There are only two pins on J812 that are necessary to make the programming cable: GND [Pin 1] and IPCB [Pin 6]
Pin 6 is on the right as you view the station control tray from the front. You can verify that - measure the two pins with a high impedance voltmeter. The IPCB pin will have voltage [data] on it, the GND pin won't. Your PTT issue indicates PA shutdown due to either failure to make power or high SWR. This will happen if the station filter alignment does not match the station's programmed frequency. Trouble in the filters due to whiskers could also cause this. It could also be as simple as a dirty power set pot. Obviously, there are also other possible component failure areas such as the IPA or power control circuits, however these stations are very reliable so odds are your issue is something simple. ----------------------------------------------------------- --- In [email protected], Ken Arck <[EMAIL PROTECTED]> wrote: "... Can anyone give me a hand with some preliminary questions regarding a UHF repeater (still waiting - after a week - for the owner of the MSF5000 group to approve me!)? Specifically 2 questions 1) The Batlabs programming cable info says pin 1 of the control (programming) jack is on the left as viewed from the front of the radio, whereas the RB webpage says pin 1 is on the right. Which is correct? 2) The MSF boots up without errors and both Rx & Tx VCO LEDs light at the end. However, putting the unit into xmt (using the front panel switch) only produces a 100 ms (or so) flash of the associated PA LEDs and no RF out. ..."
