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








