Newsgroup: it.hobby.radioamatori
Titolo: cerco modifiche tm742

Salve a tutti!!!!
Sto cercando queste modifiche disperatamente....
vi ringrazio in anticipo!!!   :-)

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Ecco quello che cerchi.
73 de Erminio Cioffi    IZ8AJQ
pippo wrote:

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Subject: TM-742/942 Remote Control
Yes, it can be controlled remotely.  Here's what Kenwood sent me after I
called up and asked.  What they don't make clear is that when the unit
is in *microphone* remote control mode, any tones heard through the mic
will also control the radio, including what comes through the speaker!
That mode allows you to do more than the limited "official" DTMF remote
control--things like adjusting the squelch, for instance.  Also, note
that once you've given the access code, there is no access control other
than PL tones, until you turn off remote control by sending A#.  This
also means that you need to be very careful with the mic when it's
controlling the radio, because I've found that it's very liberal about
what it interprets as a DTMF tone, including such things as white noise,
road noise, and the clunks and bangs of hanging up the mic.
The remote mode described below is essentially identical to that for the
732A.
A setup that I've found works very nicely is to run crossband repeat
between 220 and 2 meter, and control through 440 simplex.  Lets me use
my HT on 220, with no control signals on the talk channel. Cool!
73,
-Randy, KD6ULI
---------------------------------------------------------------------------
TM-942A, TM-742A
REMOTE CONTROL BY EXTERNAL DTMF SIGNAL, Instruction Manual Addendum
This transceiver can be remote-controlled by any other transceiver which
can transmit DTMF tones. This instruction is similar to Remote Control
by DTMF Microphone, page 61
FUNCTION SELECTION
1. Select a common band for the TM-742A/942A and the remote control
   transceiver, and enter the same frequency on both transceivers. Enter
   a 3 digit DTSS code (xxx) on the TM-742A/942A (Refer to Note 2.)  The
   DTSS icon must be displayed. (See DTSS code selection, pages 72
   through 75.) 
2. Press the Band Sel key (push the volume control) to select the band
   to be controlled. DTSS should be turned off on this band.
Repeater Mode: If you intend to operate the transceiver in the Repeater
mode, review Instruction Manual pages 59 & 60, Operation as a Repeater,
for an explanation of Fixed Band and Cross Band Repeater modes.  This is
not a 100% duty cycle transmitter. Before selecting the Remote Control
mode, set the transmitter output power to Low or Medium, and set the
Time-Out-Timer (page 32) at three (3) minutes.
3. Press the RC key on the transceiver. The RC and DTSS icons will
   flash.
OPERATION
1. Be sure the frequency for the remote transceiver is the same as the
   TM-742A/942A, and that the remote transceiver's DTSS (if so equipped)
   is off. 
2. Control mode initialize. Place the remote transceiver in transmit,
   and send "A" (fourth column key, not alphabet) followed by the
   correct 3 digit DTSS code (xxx), then "#". Each key press and space
   must be less  than 1 second each. Using DTMF memory will be the most
   convenient method to send this control string. (Two or three attempts
   may be required.) 
3. On the transceiver under remote control, the DTSS icon will display
   steadily, and the RC icon will continue to flash. The transceiver is
   now ready to accept external DTMF Remote Control. 
FUNCTIONS WHICH CAN BE CONTROLLED BY THE REMOTE TRANSCEIVER
Function			DTMF keys (Notes)
CALL CH. mode ON                7
CALL CH. mode OFF               8
  (Return to VFO mode)
Control mode initialize         A, xxx, #
Control mode exit               A, #
CTCSS ON                        3
CTCSS OFF                      6
Frequency entry                 A, 0-9
  (In VFO mode. Use numeric keys)
MR mode ON                      9
MR mode ch no. select           A, xx
  (In MR mode. Use numeric keys)
MR mode OFF                     8
(Return to VFO mode)
T.ALT ON                        1
T.ALT OFF                       4
Tone Freq. Sel                  B, A, xx
  (xx=2 digit tone ch. no 0138)
Tone ON                         2
Tone OFF                        5
TX power (H=no letter, M, L)    0
UP (freq, tone or MCH)          #
Down (freq, tone or MCH)        *
VFO mode                        8
X-Band Repeat ON                C, A, #
  (& then exit Control mode)
X-Band Repeat OFF               A, xxx, #, D
  (Restart Control mode initialize)
Notes
1. To set the memory channels or tone frequency channels, select the
   mode, then input the channel number using the numeric keys. For the
   tone freq. channel numbers, please see page 70. (The UP or DOWN
   buttons may also be used to increment or decrement channels or VFO
   frequency, but no acknowledge or feedback is provided.)
2. It is presently not legal to transmit control codes below 222MHz.
   Since it is illegal to transmit control tones (DTMF) on the 2m band,
   you must enter a 3 digit DTSS code (xxx) on the 440MHz band. The DTSS
   icon must be displayed on the 440MHz band.  
3. The microphone, and the mic element, are always on, including in the
   RC mode. DTMF tones from the transceiver's speaker, or from a
   telephone with speaker, may "take control" of the radio, just as
   pressing a DTMF button on the microphone. It is not advisable to
   leave the radio unattended in the RC mode.  
4. There is one function which is not supported and cannot be recovered
   by the remote transceiver: RC cancel, go to the Intercom mode. Press
   A, B. This is one-way & must be reset with transceiver RC button! 
--
Internet: 
gob...@ucsd.edu
----------------------------
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Copied from the QRZ! Windows Ham Radio CDROM
 
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Subject: TM742 freq extension .1
Original from JP1LRT to MODS@WW
Hello!!!! I have recieved message from N8QXP Charles. He asked me mdification
of KENWOOD TM-742. I found it on radio magazine. The modification is very 
simple. But my english is very very poor. I am afraid that you can not make
out. If you have any questions , please ask me again.  N8QXP charles saied
that he do not need graphics. But I need to graphics to explain. HI!
1. Open the lower panel of TM-742.
 ****** There are TWO version. Please check which version your rig is.******
                      FRONT PANEL IS UPER SIDE
      ___                               ___    ___    ___       <<<=== BAND SEL
   ---|-|-------------------------------|-|----|-|----|-|--------
  |                                                              |
  |______________*_______________________________*_______________|
  |     11                    2222                               |
  |    111                   22   22                             |
  |     11                      22                               |
  |11      22                                 |       
  |     11                   22222222                            |
  |                                                              |       
  |                                                              |       
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
2.   ******  FOR OLD VERSION ******
     SEE THE POINT OF [ 2 ] .If you can find a small board masked with black
     sponge , your TM-742 is OLD VERSION.
3.   On right side small board , there are three lines. Make short circuit
     with midlle line and lower line.
2.   ****** FOR NEW VERSION ******
     SEE THE POINT OF [ 2 ] . If you can not find a small board , your rig is
     NEW VERSION.
3.   SEE THE POINT OF [ 1 ]. There is a chip [ 2R7 ] . And below this chip
     [ 2R7 ] , there are small chip [ 473 ] .  
          [ GRAPHIC IS FOR JA VERSION ]
      *-*-*-*-*-*-*-*
              R R R X            R =  chip [ 473 ]
      * * * * * * * *
      * * * * * * * *            Make short circuit two X point.
              X     R            Maybe on your TM-742,there are chip [ 473 ]
      *-*-*-*-*-*-*-*            with different patern. This graphic is for
                                 JA version.  So please try until modification
                                 will succeed.
OPERATION
1. ON 144MHz  PRESS BAND SEL MORE THAN 1SEC .   MODE CHANGE AM <-> FM.
2. ON 430MHz                 DITTO              BAND CHANGE 430 <-> 870
3. ON 1200MHz                DITTO                          1200 <-> 870
4. [F] + BELL  ->  REPEATER DUAL RCV.
5. 118-136MHz  MODE CHANG TO AM AUTOMATICALY.
6. X-BAND REPEATER OPERATION.     SELECT ONE BAND BY [BAND SEL]  SELECT ONOTHER
   BAND BY [CONT SEL].   PRESS [F] KEY MORE THAN 1SEC. PRESS [MUTE] KEY.
   X-BAND OPERATION WILL WORK.
   PRESS [F] THEN [MUTE] KEY -> CANCEL X-BAND REPEATER OPERATION.
73s                DE JP1LRT @ 
JL1YVX.10.JNET1.JPN.AS
                              YOSHIHARU "KEI" TSUKUURA
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TM742.2
From: 
VE2...@VE2PAK.PQ.CAN.NA
VE2PAL/TPK 1.81 Msg #:17  Le 31/05/93 a 8:27Z
Subject: TM-742/942 Beyond Mars/CAP Mod. Guide
Procedure:
1. Detach the front panel from the main chassis.
2. Remove the bottom cover of the transceiver by removing the 4 screws on
   the bottom of the cover and loosening the 4 screws on the side of the
   unit.
3. Orient the radio so the bottom is up and the front panel area is near
   your chest. Near the front panel area you will find a large board, this
   is the control unit.
4. Remove the chip resistors "Y" noted in the diagram below, and reinstall
   them in position "Z" as shown.
5. Reinstall the bottom cover of the transceiver and reattach the front
   panel.
6. Reset the microprocessor. Press and hold the MR key while the power is
   switched on. Then release the MR key. This will erase all operator
   programmed data.
7. The frequency range after modification will be:
        28  Mhz Band:   RX:   18.0 thru  54.0 Mhz
                        TX:   26.0 thru  45.0 Mhz
        50  Mhz Band:   RX:   40.0 thru  90.0 Mhz
                        TX:   46.0 thru  76.0 Mhz
        144 Mhz Band:   TX:  136.0 thru 174.0 Mhz
        220 Mhz Band:   RX:  215.0 thru 260.0 Mhz
                        TX:  215.0 thru 235.0 Mhz
        440 Mhz Band:   TX:  410.0 thru 470.0 Mhz
        1.2 Ghz Band    RX/TX: 1100.0 thru 1400.0 Mhz
        Please note that these are theoretical ranges only. Not
        all radios will be capable of tuning the entire range.
          Control Unit X53-346X-XX A/2
      _____________________________________   
                                          I
                                          I   Remove Y resistors and 
                         ---- ----        I   reinstall in position Z
                            Z IIYY        I
                         ---- ----        I
                         oooo oooo        I
                         ---- ----        I
                         IIIY   ZZ        I
                         ---- ----        I
                                        2 I
                                        R I
                                        7 I
VE2PAL
Paul Lambert
2080 Dunant
Sherbrooke (Quebec)
Canada J1H 5G9
(819) 821-4470
VE2PAL @ VE2PAK 
PQ.CAN.NA
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