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