Three areas to look for bad solder connections. 1. Driver on the main PA board (usually Collector) 2. Strap between Driver and PA finals. ( this is on the PA board) 3. Strap from PA board to Filter.
I have had all three happen to me on different hiband repeater PAs. David WA4ECM ===================== From: Joe <[EMAIL PROTECTED]> Date: 2007/12/03 Mon AM 09:29:59 CST To: [email protected] Subject: [Repeater-Builder] GE MASTRII UHF PA PL19d424895g32 repair I'm slowly going through all my repeater stuff here and have a problem with the 100 watt UHF PA PL19d424895g32. No output. I checked the exciter into another identical PA and it works fine. Drive is a little low, 100mw, but it drives the other identical amp just fine. The bad PA draws 5 amps when keyed, the power control pot varies this current from 0-5 amps. No output out of the PA. This was a working repeater that is being tested on it's original frequency of a 45/1456Mhz split. No parts look burned or discolored. The straps between the boards look fine, no cracks. I touched them up with and iron anyway just to check. My first thought is to check the output of the 40watt stage. Any words of wisdom before I tear into this beast? Any ideas? I seems to remember reading about a UHF PA common problem but can't find it in any of the reflector archive messages. 73, Joe, k1ike
