Différences

Ci-dessous, les différences entre deux révisions de la page.

--- documentation:hamradio:radios:kenwood_tm733e:index [2022/06/27 23:42] – [UHF (430~450 MHZ)] f1sls
+++ documentation:hamradio:radios:kenwood_tm733e:index [2023/11/21 11:17] (Version actuelle) – [DOCUMENTATION] f1sls
@@ Ligne 2: / Ligne 2: @@
 ====== KENWOOD TM-733E ======
-===== HYBRID MODULES =====
+===== DOCUMENTATION =====
+  * {{ :documentation:hamradio:radios:kenwood_tm733e:kenwood_tm-733a-e-inst-man.pdf |Kenwood TM-733A/E Instruction Manual [EN]}}
+  * {{ :documentation:hamradio:radios:kenwood_tm733e:kenwood_tm-733a-e-inst-man_ocred.pdf |Kenwood TM-733A/E Instruction Manual OCRized, searchable [EN]}}
+  * {{ :documentation:hamradio:radios:kenwood_tm733e:kenwood_tm-733a_e_service_manual.pdf |Kenwood TM-733A/E Service Manual [EN]}}
+  * {{ :documentation:hamradio:radios:kenwood_tm733e:522-tm732-733-v2.125.pdf |Pilotage à Distance DU TM-732 ou 733 - F1LVT (et la collaboration de F1IRW) - ADRASEC 38 - Février 1999 [FR]}}
-==== VHF (144~148 MHz) ====
+===== VHF HYBRID MODULES =====
   * {{ :documentation:hamradio:radios:kenwood_tm733e:s-av17_toshiba.pdf |TOSHIBA S-AV17}}
     {{:documentation:hamradio:radios:kenwood_tm733e:toshiba_s-av17.jpg?direct&400|}}
   * ICOM SC-1091
-{{:documentation:hamradio:radios:kenwood_tm733e:sc-1091_big.jpg?direct&400|}}
+    {{:documentation:hamradio:radios:kenwood_tm733e:sc-1091_big.jpg?direct&400|}}
+===== UHF HYBRID MODULES =====
-==== UHF (430~450 MHZ) ====
   * {{ :documentation:hamradio:radios:kenwood_tm733e:m57788mr_mitsubishielectricsemiconductor.pdf |MITSUBISHI M57788MR}}
-{{:documentation:hamradio:radios:kenwood_tm733e:m57788mr_mitsubishi.jpg?direct|}}
+    {{:documentation:hamradio:radios:kenwood_tm733e:m57788mr_mitsubishi.jpg?direct&400|}}
   * ICOM SC-1318
-{{:documentation:hamradio:radios:kenwood_tm733e:sc-1318_icom.jpg?direct&400|}}
+    {{:documentation:hamradio:radios:kenwood_tm733e:sc-1318_icom.jpg?direct&400|}}
+===== TSU-8 CTCSS DECODER MODULE (OPTIONAL) =====
+{{:documentation:hamradio:radios:kenwood_tm733e:kenwood_tsu-8.jpg?direct|}}
+===== DISPLAY BACK LIGHT REPLACEMENT =====
+----
+==== UNDOCUMENTED INFOS ====
+<code>
+Scott, here is the new release of TM733A.DOC.  You can also delete the
+TM733.MOD file from /pub/hamradio/mods/kenwood because all the info in the
+.MOD file is in the .DOC file, but in a more updated and specific format.
+Thanks for the great ham radio ftp site.
+--
+Brad A. Killebrew N5LJV, EMT-B        | Student of Computer Engr Technology
+President, University of Houston ARC  |    University of Houston, Texas
+Internet: n5ljv@uh.edu                |  U of H Amateur Radio Club  WB5FND
+AMPRnet : n5ljv@sugarland.ampr.org    |      uharc@post-office.uh.edu
+Packet  : n5ljv@f6cnb.#setx.tx.usa.na | Box 85-T2, 4800 Calhoun, 77204-4083
+AT&Tnet : 713-743-6676  Fax 743-4032  | For info, finger tech14c@jetson.uh.edu
+-------------------------------- TM733.DOC ----------------------------------
+Modifications, Undocumented Features, and Bugs for the Kenwood TM-733A.
+Release 2.0   Updated October 1, 1994
+Updates for Release 2.0 are identified by parenthetical statements.
+There is also some new information sprinkled throughout the previous material
+either to update it, to correct misinformation, or to be more specific.
+This document is a compilation of Internet messages from
+Steve Haehnichen KE6JGK and Brad Killebrew N5LJV, edited by Brad Killebrew.
+------------------------------
+Extended RF Modifications
+------------------------------
+Refer to diagram below. (Inserted into Release 2.0)
+Remove power source from the radio.
+Remove the display panel.
+Remove the top cover the radio.
+Face the front of the radio away from you.
+Remove the speaker.
+Looking from the back of the radio, the control board is vertically
+mounted just behind the front panel wall (which can be removed easily
+if better access is needed.)
+Just to the right of a chip labeled XRU4066BCF and just to the left of
+two green wires (B2 & B3 which are draped over the board to the rear) are
+two zero-ohm SMT resistors, B0 and B1, marked "000".
+Remove B0. (the one on the left - furthest from the green wires)
+Taking it out might be a bit tricky.  It's glued down for surface-mount
+assembly.  Be careful not to pull the trace from the board.
+Perform a CPU reset by holding [MR] while turning on the radio.
+It will then ask if it is "OK?" to reset, press [MR] again.
+The ranges after modification are as follows:
+Tx: 136-174 410-470
+Rx: 118-174 300-470
+The cellular band is indeed missing.
+ONLY Removing Jumper 1 (B2) is the MARS/CAP modification.
+** Diagram of specified area on Control Board **
+EDGE OF BOARD, viewed from the rear, looking toward front panel
+                              Green jumper wires (B2, B3)
+     _______        ___     ___     ___     ___     ___
+   -|       |-     | _ |   | _ |   |_ _|   |_ _|   |___|
+   -| XRU   |-    B0| |   B1| |   B2 |    B3 |
+   -| 4066BF|-      |_|     |_|     _|_     _|_     ___
+   -|       |-     |___|   |___|   |___|   |___|   |___|
+   -|       |-             _______
+   -|       |-           -|       |-
+   -|_______|-           -|       |-
+                         -|       |-
+                         -|       |-
+                         -|       |-
+                         -|       |-
+                         -|_______|-
+The jumpers are actually soldered on the other side of the board,
+but the loops come up over the top and hang over the B0/B1 side.
+B0=R414
+B1=R412
+Here's something interesting!  According the Kenwood rep I spoke to,
+performing this mod *does not* void your factory warranty.  The same
+goes for any Kenwood published service bulletin or modification info.
+We are encouraged to perform the repairs ourselves to save them the
+trouble and expence.
+------------------------------
+DTMF Remote via Microphone
+------------------------------
+The TM-733 is fully DTMF remotable via the microphone (documented).
+The radio can also be externally DTMF controllable with an HT, but that
+will be described later.
+The DTMF control keys are exactly as shown on page 81 of the
+manual.  Note that the microphone is active all the time, so any
+ambient DTMF tones near your mic will also change rig settings.  This
+includes tones coming in on the other band and out the speaker.
+------------------------------
+Cross Band Repeating
+------------------------------
+Cross band repeat isn't documented but comes ready from the factory.
+To enable cross band repeat from the front panel, first select a band
+by pressing BAND SELECT.  Then, change the control to the other band by
+hitting [CONT SEL].  Next, press [F] for one second, then the "X" button
+(far right side).  Decimals will appear between the Kilohertz digits, and
+the "ON" indicator will light momentarily.  The microphone sequence to
+enable cross band repeat while in remote control mode is "DC".
+The transmitter hang time can be toggled between 500ms to 0ms by
+turning on the radio with [LOW] pressed.  They also recommend enabling
+the Time-out Timer, for obvious reasons.
+Note that the TM-733 can also be used as a "one-way" cross-band repeater.
+For example, if you can receive a distant repeater with your HT, but have
+difficulty getting into it, you can use the TM-733 to boost your transmitted
+signal.  To set this up, just omit the part where you "change the control
+to the other band by pressing [CONT SEL]."  Doing this will setup the TM-733
+to repeat your signal to the other band, but will not retransmit the distant
+station back to you. If this sounds ambiguous, play around with it a little
+and it will begin to make sense.
+------------------------------
+DTMF Paging and Squelch
+------------------------------
+The DTMF Paging & DTMF Squelch protocol (AAA*BBB) is compatible with
+the Yaesu 530 and all Kenwood radios supporting this.
+------------------------------
+DTMF Monitor
+------------------------------
+There are some serious bugs in the "DTMF Monitor" feature (Page 63:
+[PTT] + [DWN] + Power On).  This feature supposedly lets you hear the
+DTMF tones you are transmitting.  The first problem is that it only
+gives you a short tone from the internal speaker.  This is not true to
+the transmitted tone that lasts as long as you hold the key.  The much
+bigger problem is that it mixes the desired tone and the feedback tone
+resulting in an almost indecodable DTMF tone.  Kenwood is aware of this bug.
+(Updated information for Release 2.0):
+Per Ricardo, a Kenwood technician, they are aware of this bug and are
+working on a fix.  No details yet.
+------------------------------
+Front Panel
+------------------------------
+There are two undocumented icons on the display; one is the "heart"
+symbol.  Anyone know what that's for?  It could just be a spare.  I
+noticed they used the odd "spade" symbol to indicate AM receive, so
+maybe these were last minute extras.  Dunno..
+From looking at the schematic, it seems that the only programmable
+memory is physically located in the detachable front-panel.  I think
+this means that if I use my front-panel on someone else's radio, I get
+all my memories and settings.  Anyone try this?
+The whole front panel is connected to the rig by four wires (yep,
+including the volume/squelch pots.)  According to the schematic, these
+are: power, ground, data in, and data out.  I'm wondering how hard it
+would be to make a PC interface for this thing and replace the whole
+display and controls with a full-screen version.  It wouldn't surprise
+me if many of the programming limits were also imposed by the
+front panel, and not the unit.
+------------------------------
+Wireless Cloning
+------------------------------
+The advertised but undocumented Wireless Clone function is described
+in App Note AAN-0008 which they will mail out on request.  (Maybe if
+enough people ask for it, they will include all the functions in
+future instruction manuals.)  In summary:
+- Prepare the two radios for simplex operation on the same frequency.
+- Turn both radios off
+- Press [CALL]+[SHIFT] + [Pwr On].
+- This should place the radios is clone mode with "CLonE" on the display.
+- Press PTT on the "Master" radio momentarily.  This will start
+  sending the programming DTMF tones.
+- After all data has been transferred, the display of all radios will
+  read "End", indicating success.
+- If the signal is interrupted or corrupted, the "Slave" displays will
+  read "Err".  Turn them off and try again.
+Notes:
+- Both the Master and Slave radios must have the same number of
+  memory channels available for each band.  Example: You can not clone a
+  stock Master to a Slave with ME-1 memory expansion.
+- You can not clone between different Kenwood radio models, even if
+  they seem identical.
+Be careful when using the clone feature.  It has been known to wipe out
+or scramble memories on the master radio during or right after clone.
+------------------------------
+Bugs and Problems
+------------------------------
+To date, I have logged two trouble reports with Kenwood.
+The first is the well-known problem with the transmitted PL (CTCSS) tone.
+The tones are filthy.  They contain many harmonics and synthesis noise.
+I'm guessing this is because they are using 7-bits from the CPU and a
+resistor net (DAC) to synthesize the tone.  The sound/intensity of the
+noise depends on the actual frequency being generated.  The PL tones also
+come out of the radio's speaker while transmitting. Weird, but not a problem.
+The PL noise seems most messed up (on my radio) at 107.2 Hz, where the
+noise beats with the tone.  Go simplex and ask someone to describe the
+noise to you, or listen carefully to your own speaker while
+transmitting.  Some repeaters do a better job than others of hiding
+the noise for you.
+(New information inserted into r2.0):
+=============================
+Transmit PL Fix
+=============================
+Kenwood just released a Service Bulletin to address the transmitted PL
+tone noise on the TM-733A.  (Yeah!!)  Call the Kenwood Service
+Dept. (1-310-639-7140) if you want a hardcopy.  Here's a summary of
+the text.  Use it at your own risk.  If you are going to get into your
+radio with a hot iron, you should first get the real paper from
+Kenwood with the drawing.
+Kenwood Service Bulletin #ASB-1060        2 Pages
+Subject: TM-733A PL Tone Distortion       August 30, 1994
+Symptom:
+--------
+Transmitted PL tones at the receiving station have a relatively high
+level of distortion.  This is easily seen when the incoming signal is
+viewed on an oscilloscope.
+Countermeasure:
+---------------
+Change the value of the "Pull-up" resistors in the PL tone encoder
+circuit as shown in the accompanying chart and illustration.  This
+reduces the distortion from around 9% to approximately 4%.
+  Part  OLD value  NEW value
+  ----  ---------  ---------
+  R542  1.8k       2.7k
+  R543  1.8k       3.3k
+  R544  1.8k       4.7k
+  R545  1.8k       6.8k
+  R546  1.8k       10k
+  R547  1.8k       10k
+  R548  1.8k       10k
+Procedure:
+----------
+. Disconnect the power cable, microphone and antenna's, etc.
+. Detach the front panel and set it aside.
+. Remove the top and bottom covers.
+. Remove the speaker and speaker mounting bracket.
+. Disengage the plastic front panel from the main chassis.
+. Carefully disconnect the two ribbon cables from the Tx/Rx unit C/4.
+. Remove the two Phillips head screws that secure the Tx/Rx unit to
+   the chassis.
+. Turn the circuit board over and replace the resistors using the
+   parts list and illustration as a guide.
+. Reverse steps 1-7 for reassembly.
+     TX-RX Unit (X57-4360-00)     Foil Side View
+---------------------------------------------------------------
+                                R  R  R   R542
+  5  5
+  4  4   R543
+  6  4
+                                          R545
+   (IC403 on component side)      R
+
+
+       _______
+                                        -|       |-
+                                        -|       |-
+                                        -|       |-
+                                        -| IC402 |-
+                                        -|       |-
+                                        -|       |-
+                                        -|_______|-
+---------------------------------------------------------------
+Caution: This modification requires advanced surface mount soldering
+equipment that is rated for CMOS circuits.  It also requires
+familiarity with advanced surface mount soldering techniques.  If you
+do not have the proper equipment or knowledge do not attempt this
+modification yourself.  Seek qualified assistance from your closest
+Kenwood Service Center (Long Beach, CA, or Virginia Beach, VA).
+The Service Manual specifies a test for the PL.  The technician is
+simply required to verify that any one PL tone is between 500 and 1500
+Hz deviation.  This is quite a wide tolerance range!  The "standard"
+PL tone deviation should be 750 Hz.  Twice that strong might be too
+strong and become audible.  There are no trim-pots on the PL
+deviation, so I'm guessing that the deviation is pretty constant from
+radio to radio.
+The dirty PL is definitely found on early models, but we have had many
+reports that the PL problem has been fixed in newer versions of the radio.
+If you purchased your radio after September 15, 1994, (or your serial number
+is greater than 55000000) it's a good chance that you may not have the PL
+problem.
+------------
+The other problem concerns the DTMF Confirmation Tones.  This feature
+is off by default (I wonder why :), while it seems pretty useful.  To
+turn it on, press [PTT] + [Down] on the microphone while powering the
+radio on.  This will generate short DTMF confirmation tones whenever
+you send DTMF over the air from the keypad.  Unfortunately, it mangles
+the beginning of the outgoing DTMF tone!  This is serious enough that
+most local repeaters can't detect the tone, or count it as two tones.
+Get a receiver and listen to what you are sending out when the
+Confirmation tones are enabled.  It sounds to me like they may be
+mixing the confirmation tone in with the real tone and getting some
+destructive interference.  Just a guess, though.
+I called a Kenwood technician (Ricardo) and worked with him on the
+phone to reproduce the problem there.  So, as of today, this is a
+Known Problem, and they are looking into a fix. :-)
+I am really curious to know what they would say if other folks called
+up and complained about this problem.  Would they deny hearing about
+it, or would it really be a Known Problem?  Might give some insight
+into the PL-noise denial thing anyway. :-)
+Personally, I'm much more concerned about the noisy PL than the DTMF
+confirmation tones, since I can just shut those off and pretend that
+feature doesn't exist.  If enough people call about the PL problem,
+maybe they will come out with a real fix and offer it under warranty
+to all the radios out there (since they're all pretty new).  My guess
+is that it will involve a free TSU-8 tone decode module, but don't
+hold your breath. :-)
+------------------------------
+External DTMF Remote Control
+------------------------------
+The following procedure places the 733 in External DTMF Remote Control.
+Note that this mode is different than DTMF Remote Mode.  This mode
+concerns the control of the 733 with an HT, and not the microphone.
+- Press Band Select and select the UHF band.
+- Pick a UHF control frequency.
+- Turn on the UHF DTSS function and select a tone sequence. (p. 89)
+- Turn the UHF DTSS function back off.
+- Press Band Select to move to the VHF band.
+- Press [CONT SEL] to move control back to the UHF band.
+- Turn OFF the radio, press and hold [CONT SEL] while turning the radio
+  back on, then release [CONT SEL].  The S-meter scale and the DT
+  indicators for the UHF band will begin flashing.  The LOCK indicator
+  will turn ON, and most front-panel keys (except PWR) will be disabled.
+- To begin remote control, you should key the external radio and
+  press the following key sequence: "Axxx#" where "xxx" is the preset
+  DTSS code selected earlier.
+- If the proper code is received by the 733, the beeper will sound and
+  the DT indicator will stop flashing.  The radio can now be
+  remotely controlled using the function chart below.
+- To return to standby mode, press "A#" on the remote radio.
+- To return the radio to normal operation, turn the radio off, then
+  press and hold [CONT SEL] while turning the radio back on.
+Refer to this chart when using the TM-733 in "External DTMF Control".
+               2               3               A
+       T.ALT ON         TONE ON        CTCSS ON         ENTER
+               5               6               B
+       T.ALT OFF        TONE OFF       CTCSS OFF       TONE SEL
+               8               9               C
+         CALL            VFO           MEMORY        REPEATER ON
+          *               0               #               D
+         DOWN        POWER LEVEL         UP          REPEATER OFF
+There are no "shifted" functions.  Just one function per button.
+After you hit "B" for TONE SELECT, press * or # to go up or down,
+and same is true when in VFO mode or in MEMORY mode.
+Tones 7, 8, and 9 mimic the three buttons at the top of the 733 mic.
+Pressing "C" places the radio in cross band repeat mode.  You will
+recognize this because of the dots between Kilohertz digits.
+After pressing "C", put the radio back into standby mode with "A#".
+The 733 will now cross band repeat.  To disable cross band repeat, place
+the radio back into the External DTMF Remote Control with "Axxx#".
+If you can read through the lines, the 733 is capable of operating
+as a frequency agile remote base.  Now Kenwood just needs a CW IDer!
+------------------------------
+Assembly Mode Test
+------------------------------
+In the TM-733 Service Manual, it describes a test mode that I haven't
+seen mentioned anywhere else.  So, here's the scoop:
+Entering Assembly Mode:  [CALL] + [MUTE] + [Power On]
+All LCD segments should come on.  (To exit, power off.)
+Press the [VFO] key.  *This must always be done first*
+The serial port is checked and "F" with "80" on the display indicates
+test passed.  "1" or "2" means failure.
+Different keys now show different displays, with [LOW], [SHIFT],
+[TONE], and [REV] also adjusting the backlight intensity.
+Set the dials to minimum, then press the [MR] key.  Each of the dials
+shows the digitized level.
+This looks useful for checking all the keys and dials when you suspect
+a bad connection.
+-------------------------snip here and print---------------------------------
+Kenwood TM-733A Quick Reference Guide by Brad Killebrew N5LJV
+-----------------------------------------------------------------------------
+[#]                     PRESS A NUMBER, NOT THE POUND SIGN.
+[KEY]                   PRESS AND RELEASE [KEY]
+[KEY1]+[KEY2]           PRESS AND HOLD [KEY1] DOWN, THEN PRESS [KEY2]
+[KEY1],[KEY2]           PRESS [KEY1] MOMENTARILY, THEN PRESS [KEY2]
+[KEY]+[PWR]             WITH POWER OFF, PRESS AND HOLD [KEY] THEN HIT [PWR]
+[KEY1]+[KEY2]+[PWR]     YOU GET THE IDEA.
+[F] (1s)                PRESS AND HOLD [F] FOR ONE SECOND. "F" THEN BLINKS.
+[KEY] (1s)              PRESS AND HOLD [KEY] FOR ONE SEOND.
+[F],[KEY] (1s)          PRESS [F] MOMENTARILY, THEN PRESS [KEY] FOR ONE SEC.
+-----------------------------------------------------------------------------
+The following entries are listed in the order as they appear in the manual.
+RECEIVE AUDIO SWITCHING                 [F] (1s) [CONT SEL]
+AUTOMATIC SQUELCH                       [MHZ] + [PWR]
+S-METER SQUELCH                         [F] (1s), [S.QSL]
+SQUELCH HANG TIME                       [F]+[DIM]
+RD OUTPUT SQUELCH CONTROL               [TONE]+[PWR]
+VHF+VHF OPERATION                       [F],[CONT SEL]
+UHF+UHF OPERATION                       [F],[CONT SEL]
+TRANSMIT BAND LOCK                      [F],[BAND SEL]
+BLANKING A BAND DISPLAY                 [F] (1s), [BAND SEL]
+VFO TUNING LIMITS                       [F]+[C.IN],(L.FRQ)[MR],(U.FRQ)[MR]
+AM/FM MODE                              [MHZ] (1s)
+FREQUENCY STEP SIZE                     [VFO],[F],[STEP]
+MHZ/10 MHZ TUNING TOGGLE              [VFO],[F]+[MHZ]
+POWER OUTPUT                            [LOW]
+TIME-OUT TIMER                          [F] (1s),[TOT]
+WRITING MEMORY (SIMPLEX, DUPLEX)        [F],(FREQ),[MR]
+WRITING MEMORY (ODD SPLIT)              (RX FRQ),[F],[MR] (1s),(TX FRQ)[MR]
+MEMORY TO VFO TRANSFER                  [F],[VFO]
+ERASING MEMORY CHANNELS                 [MR],[F]+[MR]
+RECALLING MEMORY CALL CHANNEL           [CALL]
+CHANGING CALL CHANNEL (SIMPLEX,DUPLEX)  [F],[C.IN]
+CHANGING CALL CHANNEL (ODD SPLIT)       (RX FR),[F],[C.IN] (1s),(TX FR)[CALL]
+CHANNEL DISPLAY FUNCTION                [REV]+[PRW]
+INITIALIZE VFO ONE BAND                 [VFO]+[BAND SEL]+[PWR]
+INITIALIZE VFO BOTH BANDS               [VFO]+[PWR]
+FULL RESET (MINUS PM)                   [MR]+[PWR],[F],[MR]
+FULL RESET (PLUS PM)                    [MR]+[PWR],[MR]
+STORING PROGRAMMABLE MEMORY             [F],[PM],[#]
+RECALLING PROGRAMMABLE MEMORY           [PM],[#]
+ERASING PROGRAMMABLE MEMORY             [F]+[PM],[#],[MR]
+CANCELLING AUTOMATIC OFFET              [VFO]+[REV]+[PWR]
+AUTOMATIC SIMPLEX CHECKER               [REV] (1s)
+SELECTING A CTCSS TONE FREQUENCY        [F] (1s),[T.SEL],[UP]/[DOWN]
+DTMF CONFIRMATION TONES                 [PTT]+[DWN]+[PWR]
+STORING DTMF IN AUTOMATIC DIALER        [F]+[CALL]+[PWR],{#'s},[PF],[#]
+RECALLING STORED DTMF NUMBERS           [F]+[CALL]+[PWR],[MR],[#]
+TRANSMITTING STORED DTMF NUMBERS        [PTT]+[PF],[#]
+SCAN RESUME TOGLE (CO, TO)              [F] (1s),[VFO]
+MEMORY SCAN                             [MR] (1s)
+LOCKING OUT MEMORY CHANNELS             [MR],[F] (1s),[MR]
+BAND SCAN                               [VFO] (1s)
+PROGRAMMABLE BAND SCAN                  [F]+[VFO],(L.FRQ),[MR],(U.FRQ),[MR]
+CONFIRMING PROGRAMMABLE LIMITS          [F]+[VFO],(L.SHOWN),[MR](U.SHOWN)
+CALL/VFO SCAN                           [VFO],[CALL] (1s)
+CALL/MEMORY SCAN                        [MR],[CALL] (1s)
+PROGRAMMABLE MEMORY SCAN                [PM]+[PWR],[PM] (1s)
+AUTOMATIC BAND CHANGE (A.B.C.)          [F],[A.B.C.]
+ADVNACED INTERCEPT POINT (AIP)          [F]+[A.B.C.]
+MUTE                                    [MUTE]
+TRANCEIVER LOCK                         [F],[MHZ]
+ALL LOCK                                [F],[MHZ],[PWR],[F]+[PWR]
+AUTOMATIC POWER OFF (APO)               [F] (1s),[MHZ]
+BEEP LOUDNESS                           [F] (1s),[BEEP]
+FREQUENCY READOUT BY BEEPS              [F]+[TONE]+[PWR],[PF]
+DISPLAY DIMMER                          [F],[DIM]
+AUTO DIMMER CHANGE                      [F]+[LOW]+[PWR]
+DISPLAY DOMONSTRATION MODE              [CALL]+[PWR]
+REMOTE CONTROL MODE                     [F]+[CONT SEL]
+CTCSS                                   [TONE],TOGLE TILL "CT" APPEARS
+AUTOMATIC TONE FREQUENCY ID             [TONE] (1s)
+DUAL TONE SQUELCH SYSTEM (DTSS)         [F],[DTSS]
+DUAL TONE SQUELCH SYSTEM (TONE SELECT)  [F] (1s),[C.SEL],[#],[SHIFT],ETC.
+TONE ALERT                              [F],[T.ALT]
+TONE ALERT - CHANGE TONE                [F]+[SHIFT]+[PWR]
+PACKET BAUD RATE TOGLE                  [F]+[STEP]
+-----------------------------------------------------------------------------
+The following entries are in alphabetical order.
+MHZ/10 MHZ TUNING TOGGLE              [VFO],[F]+[MHZ]
+ADVNACED INTERCEPT POINT (AIP)          [F]+[A.B.C.]
+ALL LOCK                                [F],[MHZ],[PWR],[F]+[PWR]
+AM/FM MODE                              [MHZ] (1s)
+AUTO DIMMER CHANGE                      [F]+[LOW]+[PWR]
+AUTOMATIC BAND CHANGE (A.B.C.)          [F],[A.B.C.]
+AUTOMATIC OFFET (CANCELLING)            [VFO]+[REV]+[PWR]
+AUTOMATIC POWER OFF (APO)               [F] (1s),[MHZ]
+AUTOMATIC SIMPLEX CHECKER               [REV] (1s)
+AUTOMATIC SQUELCH                       [MHZ] + [PWR]
+AUTOMATIC TONE FREQUENCY ID             [TONE] (1s)
+BAND SCAN                               [VFO] (1s)
+BEEP LOUDNESS                           [F] (1s),[BEEP]
+BLANKING A BAND DISPLAY                 [F] (1s), [BAND SEL]
+CALL CHANNEL CHANGING (ODD SPLIT)       (RX FR),[F],[C.IN] (1s),(TX FR)[CALL]
+CALL CHANNEL CHANGING (SIMPLEX,DUPLEX)  [F],[C.IN]
+CALL CHANNEL RECALLING                  [CALL]
+CALL/MEMORY SCAN                        [MR],[CALL] (1s)
+CALL/VFO SCAN                           [VFO],[CALL] (1s)
+CANCELLING AUTOMATIC OFFET              [VFO]+[REV]+[PWR]
+CHANGING CALL CHANNEL (ODD SPLIT)       (RX FR),[F],[C.IN] (1s),(TX FR)[CALL]
+CHANGING CALL CHANNEL (SIMPLEX,DUPLEX)  [F],[C.IN]
+CHANNEL DISPLAY FUNCTION                [REV]+[PRW]
+CONFIRMING PROGRAMMABLE LIMITS          [F]+[VFO],(L.SHOWN),[MR](U.SHOWN)
+CTCSS                                   [TONE],TOGLE TILL "CT" APPEARS
+CTCSS TONE FREQUENCY (SELECTING)        [F] (1s),[T.SEL],[UP]/[DOWN]
+DIMMER (AUTO CHANGE)                    [F]+[LOW]+[PWR]
+DIMMER (DISPLAY)                        [F],[DIM]
+DISPLAY DIMMER                          [F],[DIM]
+DISPLAY DOMONSTRATION MODE              [CALL]+[PWR]
+DTMF CONFIRMATION TONES                 [PTT]+[DWN]+[PWR]
+DTMF IN AUTOMATIC DIALER (STORING)      [F]+[CALL]+[PWR],{#'s},[PF],[#]
+DTMF NUMBERS (RECALLING STORED)         [F]+[CALL]+[PWR],[MR],[#]
+DTMF NUMBERS (TRANSMITTING STORED)      [PTT]+[PF],[#]
+DUAL TONE SQUELCH SYSTEM (DTSS)         [F],[DTSS]
+DUAL TONE SQUELCH SYSTEM (TONE SELECT)  [F] (1s),[C.SEL],[#],[SHIFT],ETC.
+ERASING MEMORY CHANNELS                 [MR],[F]+[MR]
+ERASING PROGRAMMABLE MEMORY             [F]+[PM],[#],[MR]
+FREQUENCY READOUT BY BEEPS              [F]+[TONE]+[PWR],[PF]
+FREQUENCY STEP SIZE                     [VFO],[F],[STEP]
+FULL RESET (MINUS PM)                   [MR]+[PWR],[F],[MR]
+FULL RESET (PLUS PM)                    [MR]+[PWR],[MR]
+INITIALIZE FULL RESET (MINUS PM)        [MR]+[PWR],[F],[MR]
+INITIALIZE FULL RESET (PLUS PM)         [MR]+[PWR],[MR]
+INITIALIZE VFO BOTH BANDS               [VFO]+[PWR]
+INITIALIZE VFO ONE BAND                 [VFO]+[BAND SEL]+[PWR]
+LOCK (ALL)                              [F],[MHZ],[PWR],[F]+[PWR]
+LOCK (TRANCEIVER)                       [F],[MHZ]
+LOCK (TRANSMIT BAND)                    [F],[BAND SEL]
+LOCKING OUT MEMORY CHANNELS             [MR],[F] (1s),[MR]
+MEMORY CHANNELS (LOCKING OUT)           [MR],[F] (1s),[MR]
+MEMORY ERASING CHANNELS                 [MR],[F]+[MR]
+MEMORY RECALLING CALL CHANNEL           [CALL]
+MEMORY SCAN                             [MR] (1s)
+MEMORY TO VFO TRANSFER                  [F],[VFO]
+MEMORY WRITING (ODD SPLIT)              (RX FRQ),[F],[MR] (1s),(TX FRQ)[MR]
+MEMORY WRITING (SIMPLEX, DUPLEX)        [F],(FREQ),[MR]
+MUTE                                    [MUTE]
+PACKET BAUD RATE TOGLE                  [F]+[STEP]
+POWER OUTPUT                            [LOW]
+PROGRAMMABLE BAND SCAN                  [F]+[VFO],(L.FRQ),[MR],(U.FRQ),[MR]
+PROGRAMMABLE LIMITS (CONFIRMING)        [F]+[VFO],(L.SHOWN),[MR](U.SHOWN)
+PROGRAMMABLE MEMORY (ERASING)           [F]+[PM],[#],[MR]
+PROGRAMMABLE MEMORY (RECALLING)         [PM],[#]
+PROGRAMMABLE MEMORY (STORING)           [F],[PM],[#]
+PROGRAMMABLE MEMORY SCAN                [PM]+[PWR],[PM] (1s)
+RD OUTPUT SQUELCH CONTROL               [TONE]+[PWR]
+RECALLING MEMORY CALL CHANNEL           [CALL]
+RECALLING PROGRAMMABLE MEMORY           [PM],[#]
+RECALLING STORED DTMF NUMBERS           [F]+[CALL]+[PWR],[MR],[#]
+RECEIVE AUDIO SWITCHING                 [F] (1s) [CONT SEL]
+REMOTE CONTROL MODE                     [F]+[CONT SEL]
+S-METER SQUELCH                         [F] (1s), [S.QSL]
+SCAN (BAND SCAN)                        [VFO] (1s)
+SCAN (CALL/MEMORY)                      [MR],[CALL] (1s)
+SCAN (CALL/VFO)                         [VFO],[CALL] (1s)
+SCAN (PROGRAMMABLE BAND SCAN)           [F]+[VFO],(L.FRQ),[MR],(U.FRQ),[MR]
+SCAN (PROGRAMMABLE MEMORY)              [PM]+[PWR],[PM] (1s)
+SCAN MEMORY                             [MR] (1s)
+SCAN RESUME TOGLE (CO, TO)              [F] (1s),[VFO]
+SELECTING A CTCSS TONE FREQUENCY        [F] (1s),[T.SEL],[UP]/[DOWN]
+SQUELCH (AUTOMATIC)                     [MHZ] + [PWR]
+SQUELCH (RD OUTPUT CONTROL)             [TONE]+[PWR]
+SQUELCH (S-METER)                       [F] (1s), [S.QSL]
+SQUELCH HANG TIME                       [F]+[DIM]
+STORING DTMF IN AUTOMATIC DIALER        [F]+[CALL]+[PWR],{#'s},[PF],[#]
+STORING PROGRAMMABLE MEMORY             [F],[PM],[#]
+TIME-OUT TIMER                          [F] (1s),[TOT]
+TONE ALERT                              [F],[T.ALT]
+TONE ALERT - CHANGE TONE                [F]+[SHIFT]+[PWR]
+TRANCEIVER LOCK                         [F],[MHZ]
+TRANSMIT BAND LOCK                      [F],[BAND SEL]
+TRANSMITTING STORED DTMF NUMBERS        [PTT]+[PF],[#]
+UHF+UHF OPERATION                       [F],[CONT SEL]
+VFO TUNING LIMITS                       [F]+[C.IN],(L.FRQ)[MR],(U.FRQ)[MR]
+VHF+VHF OPERATION                       [F],[CONT SEL]
+WRITING MEMORY (ODD SPLIT)              (RX FRQ),[F],[MR] (1s),(TX FRQ)[MR]
+WRITING MEMORY (SIMPLEX, DUPLEX)        [F],(FREQ),[MR]
+-----------------------------------------------------------------------------
+-----------------------------------------------------------------------------
+If you have additions or corrections to this file, please send it to
+Brad Killebrew N5LJV at n5ljv@uh.edu, or packet n5ljv@f6cnb.#setx.tx.usa.na.
+Standard Disclaimer:  The authors take absolutely no responsibility for
+the material presented in this document.  The procedures contained herein
+work on the author's radios, but proceed at your own risk.
+Path: cea.fr!jussieu.fr!math.ohio-state.edu!howland.reston.ans.net!swrinde!news.uh.edu!elroy.uh.edu!st3qi
+From: st3qi@elroy.uh.edu (Brad Killebrew N5LJV)
+Newsgroups: rec.radio.amateur.equipment
+Subject: TM-733A.DOC
+Date: 26 Aug 1994 17:40 CDT
+Organization: University of Houston
+Lines: 588
+Distribution: world
+Message-ID: <26AUG199417405897@elroy.uh.edu>
+NNTP-Posting-Host: elroy.uh.edu
+News-Software: VAX/VMS VNEWS 1.41
+Modifications, Undocumented Features, and Bugs for the Kenwood TM-733A.
+August 22, 1994. Release 1.1
+This document is a compilation of Internet messages from
+Steve Haehnichen KD6RLY and Brad Killebrew N5LJV, edited by Brad Killebrew.
+------------------------------
+Extended RF Modifications
+------------------------------
+Remove power source from the radio.
+Remove the display panel.
+Remove the top cover the radio.
+Face the front of the radio away from you.
+Remove the speaker.
+Looking from the back of the radio, the control board is vertically
+mounted just behind the front panel wall (which can be removed easily
+if better access is needed.)
+Just to the right of a chip labeled XRU4066BCF and just to the left of
+two green wires (B2 & B3 which are draped over the board to the rear) are
+two zero-ohm SMT resistors, B0 and B1, marked "000".
+Remove B0. (the one on the left - furthest from the green wires)
+Taking it out might be a bit tricky.  It's glued down for surface-mount
+assembly.  Be careful not to pull the trace from the board.
+Perform a CPU reset by holding [MR] while turning on the radio.  It
+will then ask if it is "OK?" to reset, press [MR] again.
+The ranges after modification are as follows:
+Tx: 136-174 410-470
+Rx: 118-174 300-470
+The cellular band is indeed missing.
+Removing Jumper 1 (B2) ONLY is the MARS/CAP modification. (The green
+wire on the left).
+------------------------------
+DTFM Remote via Microphone
+------------------------------
+The TM-733 is fully DTMF remotable via the microphone (documented).
+The radio can also be externally DTMF controllable with an HT, but that
+will be described later.
+The DTMF control keys are exactly as shown on page 81 of the
+manual.  Note that the microphone is active all the time, so any
+ambient DTMF tones near your mic will also change rig settings.  This
+includes tones coming in on the other band and out the speaker.
+------------------------------
+Cross Band Repeating
+------------------------------
+Cross band repeat isn't documented but comes ready from the factory.
+To enable cross band repeat from the front panel, first select a band
+by pressing BAND SELECT.  Then, change the control to the other band by
+hitting [CONT SEL].  Next, press [F] for one second, then the "X" button
+(far right side).  Decimals will appear between the Kilohertz digits, and
+the "ON" indicator will light momentarily.  The microphone sequence to
+enable cross band repeat while in remote control mode is "DC".
+The transmitter hang time can be toggled between 500ms to 0ms by
+turning on the radio with [LOW] pressed.  They also recommend enabling
+the Time-out Timer, for obvious reasons.
+------------------------------
+DTMF Paging and Squelch
+------------------------------
+The DTMF Paging & DTMF Squelch protocol (AAA*BBB) is compatible with
+the Yaesu 530 and all Kenwood radios supporting this.
+------------------------------
+DTMF Monitor
+------------------------------
+There are some serious bugs in the "DTMF Monitor" feature (Page 63:
+[PTT] + [DWN] + Power On).  This feature supposedly lets you hear the
+DTMF tones you are transmitting.  The first problem is that it only
+gives you a short tone from the internal speaker.  This is not true to
+the transmitted tone that lasts as long as you hold the key.  The much
+bigger problem is that it mixes the desired tone and the feedback tone
+resulting in an almost indecodable DTMF tone.  Kenwood is aware of this bug.
+------------------------------
+Front Panel
+------------------------------
+There are two undocumented icons on the display; one is the "heart"
+symbol.  Anyone know what that's for?  It could just be a spare.  I
+noticed they used the odd "spade" symbol to indicate AM receive, so
+maybe these were last minute extras.  Dunno..
+From looking at the schematic, it seems that the only programmable
+memory is physically located in the detachable front-panel.  I think
+this means that if I use my front-panel on someone else's radio, I get
+all my memories and settings.  Anyone try this?
+The whole front panel is connected to the rig by four wires (yep,
+including the volume/squelch pots.)  According to the schematic, these
+are: power, ground, data in, and data out.  I'm wondering how hard it
+would be to make a PC interface for this thing and replace the whole
+display and controls with a full-screen version.  It wouldn't surprise
+me if many of the programming limits were also imposed by the
+front panel, and not the unit.
+------------------------------
+Wireless Cloning
+------------------------------
+The advertised but undocumented Wireless Clone function is described
+in App Note AAN-0008 which they will mail out on request.  (Maybe if
+enough people ask for it, they will include all the functions in
+future instruction manuals.)  In summary:
+- Prepare the two radios for simplex operation on the same frequency.
+- Turn both radios off
+- Press [CALL]+[SHIFT] + [Pwr On].
+- This should place the radios is clone mode with "CLonE" on the display.
+- Press PTT on the "Master" radio momentarily.  This will start
+  sending the programming DTMF tones.
+- After all data has been transferred, the display of all radios will
+  read "End", indicating success.
+- If the signal is interrupted or corrupted, the "Slave" displays will
+  read "Err".  Turn them off and try again.
+Notes:
+- Both the Master and Slave radios must have the same number of
+  memory channels available for each band.  Example: You can not clone a
+  stock Master to a Slave with ME-1 memory expansion.
+- You can not clone between different Kenwood radio models, even if
+  they seem identical.
+Be careful when using the clone feature.  It has been known to wipe out
+or scramble memories on the master radio during or right after clone.
+------------------------------
+Bugs and Problems
+------------------------------
+To date, I have logged two trouble reports with Kenwood.
+The first is the well-known (but still denied) problem with the
+transmitted PL (CTCSS) tone.  The tones are filthy.  They contain many
+harmonics and synthesis noise.  I'm guessing this is because they are
+using 7-bits from the CPU and a resistor net (DAC) to synthesize the
+tone.  The sound/intensity of the noise depends on the actual
+frequency being generated.  (The PL tones also come out of the radio's
+speaker while transmitting.  Weird, but not a problem.)
+The PL noise seems most messed up (on my radio) at 107.2 Hz, where the
+noise beats with the tone.  Go simplex and ask someone to describe the
+noise to you, or listen carefully to your own speaker while
+transmitting.  Some repeaters do a better job than others of hiding
+the noise for you.
+Kenwood's response to this complaint seems to vary depending on who
+you talk to.  One tech (I wish I would have got his name!)
+acknowledges the problem, and says they are working on a fix.  He
+guessed that it involves changing a resistor.  This would imply (to
+me), that they are simply turning the PL deviation (strength) down a
+bit to hide the noise.  Unfortunately, this may make the PL less
+reliable for getting into repeaters.  This is not an acceptable fix
+for me, so I'm insisting that they describe the modification to me
+before I send the radio in for repair.  So far, no luck.
+Other representatives will deny that they have heard of the problem.
+I don't know the cause of this, because it's a well-known and
+frequently discussed problem among local hams.
+The Service Manual specifies a test for the PL.  The technician is
+simply required to verify that any one PL tone is between 500 and 1500
+Hz deviation.  This is quite a wide tolerance range!  The "standard"
+PL tone deviation should be 750 Hz.  Twice that strong might be too
+strong and become audible.  There are no trim-pots on the PL
+deviation, so I'm guessing that the deviation is pretty constant from
+radio to radio.
+The other problem concerns the DTMF Confirmation Tones.  This feature
+is off by default (I wonder why :), while it seems pretty useful.  To
+turn it on, press [PTT] + [Down] on the microphone while powering the
+radio on.  This will generate short DTMF confirmation tones whenever
+you send DTMF over the air from the keypad.  Unfortunately, it mangles
+the beginning of the outgoing DTMF tone!  This is serious enough that
+most local repeaters can't detect the tone, or count it as two tones.
+Get a receiver and listen to what you are sending out when the
+Confirmation tones are enabled.  It sounds to me like they may be
+mixing the confirmation tone in with the real tone and getting some
+destructive interference.  Just a guess, though.
+I called a Kenwood technician (Ricardo) and worked with him on the
+phone to reproduce the problem there.  So, as of today, this is a
+Known Problem, and they are looking into a fix. :-)
+I am really curious to know what they would say if other folks called
+up and complained about this problem.  Would they deny hearing about
+it, or would it really be a Known Problem?  Might give some insight
+into the PL-noise denial thing anyway. :-)
+Personally, I'm much more concerned about the noisy PL than the DTMF
+confirmation tones, since I can just shut those off and pretend that
+feature doesn't exist.  If enough people call about the PL problem,
+maybe they will come out with a real fix and offer it under warranty
+to all the radios out there (since they're all pretty new).  My guess
+is that it will involve a free TSU-8 tone decode module, but don't
+hold your breath. :-)
+Check your PL, and if it bothers you, call them!  Their support number
+is: 1-310-639-7140, and you press [2] at their voice menu to get to
+the Amateur Radio department (8:30AM - 5:00PM PDT).  So far, they have
+been fairly knowledgeable and responsive, and they always call back
+the same day if they're busy or stumped.  I just wish they would offer
+a real fix.
+------------------------------
+External DTMF Remote Control
+------------------------------
+The following procedure places the 733 in External DTMF Remote Control.
+Note that this mode is different then DTMF Remote Mode.  This mode
+concerns the control of the 733 with an HT, and not the microphone.
+- Press Band Select and select the UHF band.
+- Pick a UHF control frequency.
+- Turn on the UHF DTSS function and select a tone sequence. (p. 89)
+- Turn the UHF DTSS function back off.
+- Press Band Select to move to the VHF band.
+- Press [CONT SEL] to move control back to the UHF band.
+- Turn OFF the radio, press and hold [CONT SEL] while turning the radio
+  back on, then release [CONT SEL].  The S-meter scale and the DT
+  indicators for the UHF band will begin flashing.  The LOCK indicator
+  will turn ON, and most front-panel keys (except PWR) will be disabled.
+- To begin remote control, you should key the external radio and
+  press the following key sequence: "Axxx#" where "xxx" is the preset
+  DTSS code selected earlier.
+- If the proper code is received by the 733, the beeper will sound and
+  the DT indicator will stop flashing.  The radio can now be
+  remotely controlled using the function chart below.
+- To return to standby mode, press "A#" on the remote radio.
+- To return the radio to normal operation, turn the radio off, then
+  press and hold [CONT SEL] while turning the radio back on.
+Refer to this chart when using the TM-733 in "External DTMF Control".
+               2               3               A
+       T.ALT ON         TONE ON        CTCSS ON         ENTER
+               5               6               B
+       T.ALT OFF        TONE OFF       CTCSS OFF       TONE SEL
+               8               9               C
+         CALL            VFO           MEMORY        REPEATER ON
+          *               0               #               D
+         DOWN        POWER LEVEL         UP          REPEATER OFF
+There are no "shifted" functions.  Just one function per button.
+After you hit "B" for TONE SELECT, press * or # to go up or down,
+and same is true when in VFO mode or in MEMORY mode.
+Tones 7, 8, and 9 mimic the three buttons at the top of the 733 mic.
+Pressing "C" places the radio in cross band repeat mode.  You will
+recognize this because the of the dots between Kilohertz digits.
+After pressing "C", put the radio back into standby mode with "A#".
+The 733 will now cross band repeat.  To disable cross band repeat, place
+the radio back into the External DTMF Remote Control with "Axxx#".
+If you can read through the lines, the 733 is capable of operating
+as a frequency agile remote base.  Now Kenwood just needs a CW IDer.
+------------------------------
+Assembly Mode Test
+------------------------------
+In the TM-733 Service Manual, it describes a test mode that I haven't
+seen mentioned anywhere else.  So, here's the scoop:
+Entering Assembly Mode:  [CALL] + [MUTE] + [Power On]
+All LCD segments should come on.  (To exit, power off.)
+Press the [VFO] key.  *This must always be done first*
+The serial port is checked and "F" with "80" on the display indicates
+test passed.  "1" or "2" means failure.
+Different keys now show different displays, with [LOW], [SHIFT],
+[TONE], and [REV] also adjusting the backlight intensity.
+Set the dials to minimum, then press the [MR] key.  Each of the dials
+shows the digitized level.
+This looks useful for checking all the keys and dials when you suspect
+a bad connection.
+------------------------------
+Radio Versions & Freq. Ranges
+------------------------------
+Out of curiosity, I've been trying to figure out how other variants of
+the Kenwood TM-733A can be easily "mutated" from the American "K"
+version.
+Here's what I've come up with so far.  I'm curious to know if anyone
+else has tinkered with this stuff.  I figure since the radio is so
+new, every one out there is still under warranty, so there probably
+aren't many folks poking about with a soldering iron...
+The K and P (Canadian) models seem physically identical so far.  Only
+the warranty card has a different part number.  Is there anything else
+I've missed?
+The M2, M3, M4, and E2 models have the most liberal Tx frequency
+ranges: 136-174 & 410-470 MHz, instead of the US ("K") version's:
+-148 & 438-450.
+The K version already has the widest 2m/70cm Rx range possible:
+-174 & 410-470, so there won't be any mods there.
+The K and P models are lacking significant hunks of the 800 MHz Rx
+circuitry.  In addition to some caps and inductors to link in the 800
+MHz font end, IC202 is completely missing (the chip with "80R"
+output).  I think it's a custom chip, so there's not much chance of
+finding one.  ALL models other than K and P have this chip.  If you're
+really desperate to get the 800 MHz Forbidden Band, you'll have to buy
+another radio, or try to order the chip from Kenwood Parts.
+Also, K and P models have a "KCB20" for IC209 instead of KCB14.  This
+is the "430 MHz Transmit Drive" chip.  I think K is optimized for ~445
+while the other is centered at ~435, but I'm guessing.  The
+test/calibration instructions use different test frequencies for the
+two models, so there is probably some difference in the specs.
+As for the CPU, it seems to detect which model it's in by reading pins
+through 93 on power-up.  (These are output lines to the DTMF
+encoder after power-up.)  The pins are selectively pulled hi/low by
+wires and resistors to set the model.
+If anyone knows how to override this setting by front-panel (software)
+controls, I'd be very interested to hear it!
+As for hardware configuration, here's the info:
+There are two wires (W1, W2) installed on the CPU board that
+apparently bypass resistors, tying the lines hi via 10k ohms (CP402
+Rpack) instead of low via 100k resistors (CP403 Rpack).  There are
+also three zero-ohm resistors that do something similar.
+For those of you following along at home, that does indeed make five
+select lines, with only four going into the DTMF chip. :) I'm not sure
+about the fifth one, R413.  It goes lots of places, including several
+dispersed pins on the CPU.  It's only installed on the M4 (Chinese)
+model of the radio.  Since the M4 model also uses a Chinese
+front-panel display, this line probably selects different glyphs and
+such.  It's also tied into the descriptionless pin 77 of the CPU,
+called "RPT" (cross-band repeat?).  Maybe they can't sell
+cross-banders in China.
+The other four: W1/R410, W2/R411, R412, and R414 are the selectors
+that pull on the DTMF data lines.  If we ignore the M4 and E models
+(which have more unique components), the K and M2/3 models have only
+these differences:
+        W1,2  R414
+  K,P   Yes   Yes
+  M2/3  No    No
+I'd bet one of those accounts for the different Tx range limits on the
+CPU.  Maybe the other allows for 800 MHz frequency tuning.
+-------------------------snip here and print---------------------------------
+Kenwood TM-733A Quick Reference Guide by Brad Killebrew N5LJV
+-----------------------------------------------------------------------------
+[#]                     PRESS A NUMBER, NOT THE POUND SIGN.
+[KEY]                   PRESS AND RELEASE [KEY]
+[KEY1]+[KEY2]           PRESS AND HOLD [KEY1] DOWN, THEN PRESS [KEY2]
+[KEY1],[KEY2]           PRESS [KEY1] MOMENTARILY, THEN PRESS [KEY2]
+[KEY]+[PWR]             WITH POWER OFF, PRESS AND HOLD [KEY] THEN HIT [PWR]
+[KEY1]+[KEY2]+[PWR]     YOU GET THE IDEA.
+[F] (1s)                PRESS AND HOLD [F] FOR ONE SECOND. "F" THEN BLINKS.
+[KEY] (1s)              PRESS AND HOLD [KEY] FOR ONE SEOND.
+[F],[KEY] (1s)          PRESS [F] MOMENTARILY, THEN PRESS [KEY] FOR ONE SEC.
+-----------------------------------------------------------------------------
+The following entries are listed in the order as they appear in the manual.
+RECEIVE AUDIO SWITCHING                 [F] (1s) [CONT SEL]
+AUTOMATIC SQUELCH                       [MHZ] + [PWR]
+S-METER SQUELCH                         [F] (1s), [S.QSL]
+SQUELCH HANG TIME                       [F]+[DIM]
+RD OUTPUT SQUELCH CONTROL               [TONE]+[PWR]
+VHF+VHF OPERATION                       [F],[CONT SEL]
+UHF+UHF OPERATION                       [F],[CONT SEL]
+TRANSMIT BAND LOCK                      [F],[BAND SEL]
+BLANKING A BAND DISPLAY                 [F] (1s), [BAND SEL]
+VFO TUNING LIMITS                       [F]+[C.IN],(L.FRQ)[MR],(U.FRQ)[MR]
+AM/FM MODE                              [MHZ] (1s)
+FREQUENCY STEP SIZE                     [VFO],[F],[STEP]
+MHZ/10 MHZ TUNING TOGGLE              [VFO],[F]+[MHZ]
+POWER OUTPUT                            [LOW]
+TIME-OUT TIMER                          [F] (1s),[TOT]
+WRITING MEMORY (SIMPLEX, DUPLEX)        [F],(FREQ),[MR]
+WRITING MEMORY (ODD SPLIT)              (RX FRQ),[F],[MR] (1s),(TX FRQ)[MR]
+MEMORY TO VFO TRANSFER                  [F],[VFO]
+ERASING MEMORY CHANNELS                 [MR],[F]+[MR]
+RECALLING MEMORY CALL CHANNEL           [CALL]
+CHANGING CALL CHANNEL (SIMPLEX,DUPLEX)  [F],[C.IN]
+CHANGING CALL CHANNEL (ODD SPLIT)       (RX FR),[F],[C.IN] (1s),(TX FR)[CALL]
+CHANNEL DISPLAY FUNCTION                [REV]+[PRW]
+INITIALIZE VFO ONE BAND                 [VFO]+[BAND SEL]+[PWR]
+INITIALIZE VFO BOTH BANDS               [VFO]+[PWR]
+FULL RESET (MINUS PM)                   [MR]+[PWR],[F],[MR]
+FULL RESET (PLUS PM)                    [MR]+[PWR],[MR]
+STORING PROGRAMMABLE MEMORY             [F],[PM],[#]
+RECALLING PROGRAMMABLE MEMORY           [PM],[#]
+ERASING PROGRAMMABLE MEMORY             [F]+[PM],[#],[MR]
+CANCELLING AUTOMATIC OFFET              [VFO]+[REV]+[PWR]
+AUTOMATIC SIMPLEX CHECKER               [REV] (1s)
+SELECTING A CTCSS TONE FREQUENCY        [F] (1s),[T.SEL],[UP]/[DOWN]
+DTMF CONFIRMATION TONES                 [PTT]+[DWN]+[PWR]
+STORING DTMF IN AUTOMATIC DIALER        [F]+[CALL]+[PWR],{#'s},[PF],[#]
+RECALLING STORED DTMF NUMBERS           [F]+[CALL]+[PWR],[MR],[#]
+TRANSMITTING STORED DTMF NUMBERS        [PTT]+[PF],[#]
+SCAN RESUME TOGLE (CO, TO)              [F] (1s),[VFO]
+MEMORY SCAN                             [MR] (1s)
+LOCKING OUT MEMORY CHANNELS             [MR],[F] (1s),[MR]
+BAND SCAN                               [VFO] (1s)
+PROGRAMMABLE BAND SCAN                  [F]+[VFO],(L.FRQ),[MR],(U.FRQ),[MR]
+CONFIRMING PROGRAMMABLE LIMITS          [F]+[VFO],(L.SHOWN),[MR](U.SHOWN)
+CALL/VFO SCAN                           [VFO],[CALL] (1s)
+CALL/MEMORY SCAN                        [MR],[CALL] (1s)
+PROGRAMMABLE MEMORY SCAN                [PM]+[PWR],[PM] (1s)
+AUTOMATIC BAND CHANGE (A.B.C.)          [F],[A.B.C.]
+ADVNACED INTERCEPT POINT (AIP)          [F]+[A.B.C.]
+MUTE                                    [MUTE]
+TRANCEIVER LOCK                         [F],[MHZ]
+ALL LOCK                                [F],[MHZ],[PWR],[F]+[PWR]
+AUTOMATIC POWER OFF (APO)               [F] (1s),[MHZ]
+BEEP LOUDNESS                           [F] (1s),[BEEP]
+FREQUENCY READOUT BY BEEPS              [F]+[TONE]+[PWR],[PF]
+DISPLAY DIMMER                          [F],[DIM]
+AUTO DIMMER CHANGE                      [F]+[LOW]+[PWR]
+DISPLAY DOMONSTRATION MODE              [CALL]+[PWR]
+REMOTE CONTROL MODE                     [F]+[CONT SEL]
+CTCSS                                   [TONE],TOGLE TILL "CT" APPEARS
+AUTOMATIC TONE FREQUENCY ID             [TONE] (1s)
+DUAL TONE SQUELCH SYSTEM (DTSS)         [F],[DTSS]
+DUAL TONE SQUELCH SYSTEM (TONE SELECT)  [F] (1s),[C.SEL],[#],[SHIFT],ETC.
+TONE ALERT                              [F],[T.ALT]
+TONE ALERT - CHANGE TONE                [F]+[SHIFT]+[PWR]
+PACKET BAUD RATE TOGLE                  [F]+[STEP]
+-----------------------------------------------------------------------------
+The following entries are in alphabetical order.
+MHZ/10 MHZ TUNING TOGGLE              [VFO],[F]+[MHZ]
+ADVNACED INTERCEPT POINT (AIP)          [F]+[A.B.C.]
+ALL LOCK                                [F],[MHZ],[PWR],[F]+[PWR]
+AM/FM MODE                              [MHZ] (1s)
+AUTO DIMMER CHANGE                      [F]+[LOW]+[PWR]
+AUTOMATIC BAND CHANGE (A.B.C.)          [F],[A.B.C.]
+AUTOMATIC OFFET (CANCELLING)            [VFO]+[REV]+[PWR]
+AUTOMATIC POWER OFF (APO)               [F] (1s),[MHZ]
+AUTOMATIC SIMPLEX CHECKER               [REV] (1s)
+AUTOMATIC SQUELCH                       [MHZ] + [PWR]
+AUTOMATIC TONE FREQUENCY ID             [TONE] (1s)
+BAND SCAN                               [VFO] (1s)
+BEEP LOUDNESS                           [F] (1s),[BEEP]
+BLANKING A BAND DISPLAY                 [F] (1s), [BAND SEL]
+CALL CHANNEL CHANGING (ODD SPLIT)       (RX FR),[F],[C.IN] (1s),(TX FR)[CALL]
+CALL CHANNEL CHANGING (SIMPLEX,DUPLEX)  [F],[C.IN]
+CALL CHANNEL RECALLING                  [CALL]
+CALL/MEMORY SCAN                        [MR],[CALL] (1s)
+CALL/VFO SCAN                           [VFO],[CALL] (1s)
+CANCELLING AUTOMATIC OFFET              [VFO]+[REV]+[PWR]
+CHANGING CALL CHANNEL (ODD SPLIT)       (RX FR),[F],[C.IN] (1s),(TX FR)[CALL]
+CHANGING CALL CHANNEL (SIMPLEX,DUPLEX)  [F],[C.IN]
+CHANNEL DISPLAY FUNCTION                [REV]+[PRW]
+CONFIRMING PROGRAMMABLE LIMITS          [F]+[VFO],(L.SHOWN),[MR](U.SHOWN)
+CTCSS                                   [TONE],TOGLE TILL "CT" APPEARS
+CTCSS TONE FREQUENCY (SELECTING)        [F] (1s),[T.SEL],[UP]/[DOWN]
+DIMMER (AUTO CHANGE)                    [F]+[LOW]+[PWR]
+DIMMER (DISPLAY)                        [F],[DIM]
+DISPLAY DIMMER                          [F],[DIM]
+DISPLAY DOMONSTRATION MODE              [CALL]+[PWR]
+DTMF CONFIRMATION TONES                 [PTT]+[DWN]+[PWR]
+DTMF IN AUTOMATIC DIALER (STORING)      [F]+[CALL]+[PWR],{#'s},[PF],[#]
+DTMF IN AUTOMATIC DIALER (STORING)      [F]+[CALL]+[PWR],{#'s},[PF],[#]
+DTMF NUMBERS (RECALLING STORED)         [F]+[CALL]+[PWR],[MR],[#]
+DTMF NUMBERS (TRANSMITTING STORED)      [PTT]+[PF],[#]
+DUAL TONE SQUELCH SYSTEM (DTSS)         [F],[DTSS]
+DUAL TONE SQUELCH SYSTEM (TONE SELECT)  [F] (1s),[C.SEL],[#],[SHIFT],ETC.
+ERASING MEMORY CHANNELS                 [MR],[F]+[MR]
+ERASING PROGRAMMABLE MEMORY             [F]+[PM],[#],[MR]
+FREQUENCY READOUT BY BEEPS              [F]+[TONE]+[PWR],[PF]
+FREQUENCY STEP SIZE                     [VFO],[F],[STEP]
+FULL RESET (MINUS PM)                   [MR]+[PWR],[F],[MR]
+FULL RESET (PLUS PM)                    [MR]+[PWR],[MR]
+INITIALIZE FULL RESET (MINUS PM)        [MR]+[PWR],[F],[MR]
+INITIALIZE FULL RESET (PLUS PM)         [MR]+[PWR],[MR]
+INITIALIZE VFO BOTH BANDS               [VFO]+[PWR]
+INITIALIZE VFO ONE BAND                 [VFO]+[BAND SEL]+[PWR]
+LOCK (ALL)                              [F],[MHZ],[PWR],[F]+[PWR]
+LOCK (TRANCEIVER)                       [F],[MHZ]
+LOCK (TRANSMIT BAND)                    [F],[BAND SEL]
+LOCKING OUT MEMORY CHANNELS             [MR],[F] (1s),[MR]
+MEMORY CHANNELS (LOCKING OUT)           [MR],[F] (1s),[MR]
+MEMORY ERASING CHANNELS                 [MR],[F]+[MR]
+MEMORY RECALLING CALL CHANNEL           [CALL]
+MEMORY SCAN                             [MR] (1s)
+MEMORY TO VFO TRANSFER                  [F],[VFO]
+MEMORY WRITING (ODD SPLIT)              (RX FRQ),[F],[MR] (1s),(TX FRQ)[MR]
+MEMORY WRITING (SIMPLEX, DUPLEX)        [F],(FREQ),[MR]
+MUTE                                    [MUTE]
+PACKET BAUD RATE TOGLE                  [F]+[STEP]
+POWER OUTPUT                            [LOW]
+PROGRAMMABLE BAND SCAN                  [F]+[VFO],(L.FRQ),[MR],(U.FRQ),[MR]
+PROGRAMMABLE LIMITS (CONFIRMING)        [F]+[VFO],(L.SHOWN),[MR](U.SHOWN)
+PROGRAMMABLE MEMORY (ERASING)           [F]+[PM],[#],[MR]
+PROGRAMMABLE MEMORY (RECALLING)         [PM],[#]
+PROGRAMMABLE MEMORY (STORING)           [F],[PM],[#]
+PROGRAMMABLE MEMORY SCAN                [PM]+[PWR],[PM] (1s)
+RD OUTPUT SQUELCH CONTROL               [TONE]+[PWR]
+RECALLING MEMORY CALL CHANNEL           [CALL]
+RECALLING PROGRAMMABLE MEMORY           [PM],[#]
+RECALLING STORED DTMF NUMBERS           [F]+[CALL]+[PWR],[MR],[#]
+RECEIVE AUDIO SWITCHING                 [F] (1s) [CONT SEL]
+REMOTE CONTROL MODE                     [F]+[CONT SEL]
+S-METER SQUELCH                         [F] (1s), [S.QSL]
+SCAN (BAND SCAN)                        [VFO] (1s)
+SCAN (CALL/MEMORY)                      [MR],[CALL] (1s)
+SCAN (CALL/VFO)                         [VFO],[CALL] (1s)
+SCAN (PROGRAMMABLE BAND SCAN)           [F]+[VFO],(L.FRQ),[MR],(U.FRQ),[MR]
+SCAN (PROGRAMMABLE MEMORY)              [PM]+[PWR],[PM] (1s)
+SCAN MEMORY                             [MR] (1s)
+SCAN RESUME TOGLE (CO, TO)              [F] (1s),[VFO]
+SELECTING A CTCSS TONE FREQUENCY        [F] (1s),[T.SEL],[UP]/[DOWN]
+SQUELCH (AUTOMATIC)                     [MHZ] + [PWR]
+SQUELCH (RD OUTPUT CONTROL)             [TONE]+[PWR]
+SQUELCH (S-METER)                       [F] (1s), [S.QSL]
+SQUELCH HANG TIME                       [F]+[DIM]
+STORING DTMF IN AUTOMATIC DIALER        [F]+[CALL]+[PWR],{#'s},[PF],[#]
+STORING PROGRAMMABLE MEMORY             [F],[PM],[#]
+TIME-OUT TIMER                          [F] (1s),[TOT]
+TONE ALERT                              [F],[T.ALT]
+TONE ALERT - CHANGE TONE                [F]+[SHIFT]+[PWR]
+TRANCEIVER LOCK                         [F],[MHZ]
+TRANSMIT BAND LOCK                      [F],[BAND SEL]
+TRANSMITTING STORED DTMF NUMBERS        [PTT]+[PF],[#]
+UHF+UHF OPERATION                       [F],[CONT SEL]
+VFO TUNING LIMITS                       [F]+[C.IN],(L.FRQ)[MR],(U.FRQ)[MR]
+VHF+VHF OPERATION                       [F],[CONT SEL]
+WRITING MEMORY (ODD SPLIT)              (RX FRQ),[F],[MR] (1s),(TX FRQ)[MR]
+WRITING MEMORY (SIMPLEX, DUPLEX)        [F],(FREQ),[MR]
+-----------------------------------------------------------------------------
+-----------------------------------------------------------------------------
+If you have additions or corrections to this file, please send it to
+Brad Killebrew N5LJV at n5ljv@uh.edu, or packet n5ljv@f6cnb.#setx.tx.usa.na.
+Standard Disclaimer:  The authors take absolutely no responsibility for
+the material presented in this document.  The procedures contained herein
+work on the author's radios, but proceed at your own risk.
+Path: cea.fr!jussieu.fr!math.ohio-state.edu!cs.utexas.edu!swrinde!ihnp4.ucsd.edu!network.ucsd.edu!vigra.com!news.vigra.com!steve
+From: steve@vigra.com (Steve Haehnichen)
+Newsgroups: rec.radio.amateur.equipment
+Subject: Kenwood TM-733A: Undocumented "Assembly mode"
+Followup-To: rec.radio.amateur.equipment
+Date: Thu, 11 Aug 1994 02:26:12 GMT
+Organization: Vigra, San Diego, CA
+Lines: 24
+Message-ID: <STEVE.94Aug10192612@susie.vigra.com>
+Reply-To: steve@vigra.com
+NNTP-Posting-Host: dbrown.extern.ucsd.edu
+In the TM-733 Service Manual, it describes a test mode that I haven't
+seen mentioned anywhere else.  So, here's the scoop:
+Entering Assembly Mode:  [CALL] + [MUTE] + [Power On]
+All LCD segments should come on.  (To exit, power off.)
+Press the [VFO] key.  *This must always be done first*
+The serial port is checked and "F" with "80" on the display indicates
+test passed.  "1" or "2" means failure.
+Different keys now show different displays, with [LOW], [SHIFT],
+[TONE], and [REV] also adjusting the backlight intensity.
+Set the dials to minimum, then press the [MR] key.  Each of the dials
+shows the digitized level.
+This looks useful for checking all the keys and dials when you suspect
+a bad connection.
+Have fun!
+-Steve
+Steve Haehnichen                 Vigra, Inc.  San Diego, CA
+steve@vigra.com                  (619) 597-7080 x116   Fax: (619) 597-7094
+Path: cea.fr!jussieu.fr!math.ohio-state.edu!uwm.edu!spool.mu.edu!agate!ihnp4.ucsd.edu!network.ucsd.edu!vigra.com!news.vigra.com!steve
+From: steve@vigra.com (Steve Haehnichen)
+Newsgroups: rec.radio.amateur.equipment
+Subject: Working on TM-733 Mods.. anyone else?
+Followup-To: rec.radio.amateur.equipment
+Date: Sun, 14 Aug 1994 06:50:44 GMT
+Organization: Vigra, San Diego, CA
+Lines: 81
+Message-ID: <STEVE.94Aug13235044@susie.vigra.com>
+Reply-To: steve@vigra.com
+NNTP-Posting-Host: dbrown.extern.ucsd.edu
+Out of curiosity, I've been trying to figure out how other variants of
+the Kenwood TM-733A can be easily "mutated" from the American "K"
+version.  If you're one of those folks that gets their panties all in
+a bunch over the possibility of out-of-ham-band transmit, you can skip
+this article.  I'm responsible for my own transmissions, as is anyone
+else.
+Here's what I've come up with so far.  I'm curious to know if anyone
+else has tinkered with this stuff.  I figure since the radio is so
+new, every one out there is still under warranty, so there probably
+aren't many folks poking about with a soldering iron...
+The K and P (Canadian) models seem physically identical so far.  Only
+the warranty card has a different part number.  Is there anything else
+I've missed?
+The M2, M3, M4, and E2 models have the most liberal Tx frequency
+ranges: 136-174 & 410-470 MHz, instead of the US ("K") version's:
+-148 & 438-450.
+The K version already has the widest 2m/70cm Rx range possible:
+-174 & 410-470, so there won't be any mods there.
+The K and P models are lacking significant hunks of the 800 MHz Rx
+circuitry.  In addition to some caps and inductors to link in the 800
+MHz font end, IC202 is completely missing (the chip with "80R"
+output).  I think it's a custom chip, so there's not much chance of
+finding one.  ALL models other than K and P have this chip.  If you're
+really desperate to get the 800 MHz Forbidden Band, you'll have to buy
+another radio, or try to order the chip from Kenwood Parts.
+Also, K and P models have a "KCB20" for IC209 instead of KCB14.  This
+is the "430 MHz Transmit Drive" chip.  I think K is optimized for ~445
+while the other is centered at ~435, but I'm guessing.  The
+test/calibration instructions use different test frequencies for the
+two models, so there is probably some difference in the specs.
+As for the CPU, it seems to detect which model it's in by reading pins
+through 93 on power-up.  (These are output lines to the DTMF
+encoder after power-up.)  The pins are selectively pulled hi/low by
+wires and resistors to set the model.
+If anyone knows how to override this setting by front-panel (software)
+controls, I'd be very interested to hear it!
+As for hardware configuration, here's the info:
+There are two wires (W1, W2) installed on the CPU board that
+apparently bypass resistors, tying the lines hi via 10k ohms (CP402
+Rpack) instead of low via 100k resistors (CP403 Rpack).  There are
+also three zero-ohm resistors that do something similar.
+For those of you following along at home, that does indeed make five
+select lines, with only four going into the DTMF chip. :) I'm not sure
+about the fifth one, R413.  It goes lots of places, including several
+dispersed pins on the CPU.  It's only installed on the M4 (Chinese)
+model of the radio.  Since the M4 model also uses a Chinese
+front-panel display, this line probably selects different glyphs and
+such.  It's also tied into the descriptionless pin 77 of the CPU,
+called "RPT" (cross-band repeat?).  Maybe they can't sell
+cross-banders in China.
+The other four: W1/R410, W2/R411, R412, and R414 are the selectors
+that pull on the DTMF data lines.  If we ignore the M4 and E models
+(which have more unique components), the K and M2/3 models have only
+these differences:
+        W1,2  R414
+  K,P   Yes   Yes
+  M2/3  No    No
+I'd bet one of those accounts for the different Tx range limits on the
+CPU.  Maybe the other allows for 800 MHz frequency tuning.
+So, is anyone else working towards mods for this radio, however useless?
+Happy Hacking!
+-Steve
+Steve Haehnichen                 Vigra, Inc.  San Diego, CA
+steve@vigra.com                  (619) 597-7080 x116   Fax: (619) 597-7094
+Newsgroups: rec.radio.amateur.equipment
+Path: cea.fr!jussieu.fr!math.ohio-state.edu!usc!cs.utexas.edu!convex!news.duke.edu!concert!mms!kn4aq.gary
+From: kn4aq.gary@mms.raleigh.nc.us
+Subject: WORKING ON TM-733 MOD
+Message-ID: <9408140945.0DP7D00@mms.raleigh.nc.us>
+Distribution: world
+Date: Sun, 14 Aug 94 09:45:07
+Lines: 44
+ Ne> There are two wires (W1, W2) installed on the CPU board that
+ Ne> apparently bypass resistors, tying the lines hi via 10k ohms (CP402
+ Ne> Rpack) instead of low via 100k resistors (CP403 Rpack).  There are
+ Ne> also three zero-ohm resistors that do something similar.
+ Ne> The other four: W1/R410, W2/R411, R412, and R414 are the selectors
+ Ne> that pull on the DTMF data lines.  If we ignore the M4 and E models
+ Ne> (which have more unique components), the K and M2/3 models have only
+ Ne> these differences:
+ Ne> W1,2  R414
+ Ne> K,P   Yes   Yes
+ Ne> M2/3  No    No
+ Ne> I'd bet one of those accounts for the different Tx range limits on the
+ Ne> CPU.  Maybe the other allows for 800 MHz frequency tuning.
+ Ne> So, is anyone else working towards mods for this radio, however
+ Ne> useless?
+I got a "Kenwood Supplementary Info" sheet from the dealer with my
+.  It describes removing a chip resistor "B0," also identified as
+R414, followed by resetting the CPU by holding the MR key and turning
+on power, then pressing MR again.
+It says that will open transmit from 136-173.995 MHz and 410-469.974
+MHz, and receive from 118-173.995 MHz and 300-469-975 MHz.  (I've seen
+net bulletins that say it's not really receiving 300 MHz even if the
+display is reading 300 MHz).
+The sheet also shows "B1" (R-412), and two jumpers, B2 and B3 which
+jumper solder pads right next to R-412 and R-414.  The instructions
+don't make any mention of doing anything with those parts.
+Thanks to Steve for his early hacking, and especially writing about
+the 733.
+, Gary KN4AQ, Raleigh NC
+KN4AQ.GARY@MMS.RALEIGH.NC.US
+___ Blue Wave/QWK v2.12
+Path: cea.fr!jussieu.fr!univ-lyon1.fr!swidir.switch.ch!scsing.switch.ch!news.dfn.de!Germany.EU.net!EU.net!howland.reston.ans.net!agate!ihnp4.ucsd.edu!netw
+From: steve@vigra.com (Steve Haehnichen)
+Newsgroups: rec.radio.amateur.equipment,rec.radio.amateur.misc
+Subject: Kenwood TM-733A undocumented functions.
+Followup-To: rec.radio.amateur.equipment
+Date: Thu, 18 Aug 1994 00:44:51 GMT
+Organization: Vigra, San Diego, CA
+Lines: 110
+Message-ID: <STEVE.94Aug17174451@susie.vigra.com>
+Reply-To: steve@vigra.com
+NNTP-Posting-Host: dbrown.extern.ucsd.edu
+Xref: cea.fr rec.radio.amateur.equipment:1310 rec.radio.amateur.misc:3498
+I just talked to Kenwood and found out a few new things about the
+TM-733A.  I haven't tried most of these yet (because my radio is all
+taken apart), but I'll pass the info along.
+////
+The extended range modification:
+  They *do* have an official extended range modification, but they will
+  not send it to you unless you first send them proof of MARS or CAP
+  enrollment.  I tried to explain to them that I want to transmit into
+  the hamsats at 435 MHz, but they didn't care.
+////
+The official word on the dirty CTCSS tones is that it's still an
+unknown problem, and there is no Service Bulletin to correct it.  If
+enough people notices the grunge in the outgoing tone and call them
+about it, maybe they will check into it.
+////
+The partially-documented "External Remote Control Operation" is
+documented in App Note AAN-0006.  Some people have found that when
+remote control is enabled, the microphone is hot and will hear DTMF
+tones coming from the speaker if the volume is turned up and the mic
+is near.
+To remote-control the radio with the microphone disconnected (yeah!),
+they offer this procedure:
+- Pick a UHF control frequency.
+- Turn on the UHF DTSS function and select a tone sequence.
+- Turn the UHF DTSS function back off.
+- Press Band Select to move to the VHF band.
+- Turn OFF the radio, press and hold the [CONT SEL] key, turn on the
+  radio, and then release the cont key.  This will place you in the
+  EXT standby mode.  The S-meter scale and the DT indicators for the UHF
+  band will begin flashing ON and OFF.  The LOCK indicator will turn ON,
+  and most front-panel keys (PWR stays) will be disabled.
+- To begin remote control, you should key the external radio and
+  press the following key sequence: "Axxx#" where "xxx" is the preset
+  DTSS code selected earlier.
+- If the proper code is received by the 733, the beeper will sound and
+  the "DT" indicator will stop flashing.  The radio can now be
+  remote-controlled, using the function chart in the manual (p. 81?).
+- The return to standby mode, press "A#" on the remote radio.
+- To return the radio to normal operation, turn the radio off, then
+  press and hold [CONT SEL] while turning the radio back on.  Repeat
+  one more time. (really!)
+Wow!  I would have never figured this out on my own.  I was beginning
+to think that the acoustic-coupled mic/speaker was the only way to
+remote control it.
+My reading of the instructions is that it starts off the remote
+control mode "locked", which is a good idea.  You can then unlock and
+relock it with the DTMF code sequence.  Pretty cool.
+////
+The advertised but undocumented Wireless Clone function is described
+in App Note AAN-0008 which they will mail out on request.  (Maybe if
+enough people ask for it, they will include all the functions in
+future instruction manuals.)  In summary:
+- Prepare the two radios for simplex operation on the same frequency.
+- Turn both radios off
+- Press [CALL]+[SHIFT] + [Pwr On].
+- This should place the radios is clone mode with "CLonE" on the display.
+- Press PTT on the "Master" radio momentarily.  This will start
+  sending the programming DTMF tones.
+- After all data has been transferred, the display of all radios will
+  read "End", indicating success.
+- If the signal is interrupted or corrupted, the "Slave" displays will
+  read "Err".  Turn them off and try again.
+Notes:
+- Both the Master and Slave radios must have the same number of
+  memory channels available for each band.  Example: You can not clone a
+  stock Master to a Slave with ME-1 memory expantion.
+- You can not clone between different Kenwood radio models, even if
+  they seem identical.
+////
+The advertised but undocumented cross-band repeat function is
+described in App Note ANN-0009.  Most people have already figured this
+one out.
+Basically, you set up the VHF and UHF bands, then select the "X" icon
+from the [F](for 1 second) menu.  For bi-directional repeater
+operation, make sure the PTT and Control bands are different, usually
+by pressing Cont Sel once.  If the PTT and Control indicator are on
+the same side, then it will only retransmit the other band to that
+side (for one-way extender operation).  All the decimal points will
+light up when in repeater mode.  The remote control sequence to turn
+on/off repeater mode is "DC".
+The transmitter hang time can be toggled between 500ms to 0ms by
+turning on the radio with [LOW] pressed.  They also recommend enabling
+the Time-out Timer, for obvious reasons.
+////
+The "Assembly Mode" for testing the control panel indicators, buttons,
+and knobs is documented only in the Service Manual.  I posted a
+summary a few days ago.
+////
+So, there you have it!  When I get the mods all figured out and
+tested, I'll try to post a full report with details on all the
+undocumented features and the mods.  This should end up in the
+archives somewhere.
+Happy Hacking!
+-Steve
+</code>

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