JUMA Amateur Radio Forum

Adrian, I can't thank you enough for your assistance. Yes, your diagnosis is correct! I read 5 vdc at R4/C4 junction, in STBY or TX. I then shorted J3-6 to ground, amp changed state from "TX" to "Operate". TR1 will have to be replaced. I am not sure what caused this but I do have some PTT questions ...

Thank you Adrian & Robert for suggestions. It's good to know that KH2BR is here in the states if I need help/repair... First, my PA100D has version 1.04 software & was assembled in Finland for me. I am using non JUma radios with amp. KX3, SDR Cube (modified to use TRX2 12 keying option, and various ...

I have just reconfigured my station and placement of the PA100D & have the following problem: When powering up the amp, the "Operate" mode is "Standby" . With the PTT left open. when I press "Operate" it goes into "TX" mode. Thus I can only use the amp in this manor. "Stby" to receive & manually ...