Amps
[Top] [All Lists]

[AMPS] ALPHA 78A HELP

To: <amps@contesting.com>
Subject: [AMPS] ALPHA 78A HELP
From: CSLC82@lmpsil02.comm.mot.com (Turkisher Dan-CSLC82)
Date: Mon, 2 Nov 1998 10:39:12 -0600
I have an Alpha 78A...works fine on all bands, BUT: On 20 meters in BANDPASS
mode there is internal arcing (frying noise). In MANUAL TUNE, the amp tunes
fine with no arcing. This with 50-100W drive into 50 ohm load.

Internal inspection didn't reveal anything obvious. There is some carbon
(maybe?) on the wire from the PHONE/CW switch that goes to chassis ground.
This could just be coincidence and contamination...the wire is not burned
and there are no other signs of arcing. I did redress the wire so it is well
away from the tuning capacitors.

Any ideas/suggestions on how to troublehsoot?

Thanks and 73

Dan
K0DAN

--
FAQ on WWW:               http://www.contesting.com/ampfaq.html
Submissions:              amps@contesting.com
Administrative requests:  amps-REQUEST@contesting.com
Problems:                 owner-amps@contesting.com
Search:                   http://www.contesting.com/km9p/search.htm


<Prev in Thread] Current Thread [Next in Thread>
  • [AMPS] ALPHA 78A HELP, Turkisher Dan-CSLC82 <=