Id check the SSB/CW switch carefully for arcing to a metal part. Common
problem with an underated switch.
Carl
KM1H
----- Original Message -----
From: "Larry" <lknain@nc.rr.com>
To: <amps@contesting.com>
Sent: Wednesday, September 11, 2013 2:43 PM
Subject: [Amps] Clipperton-L question
One day when I switched from CW to SSB mode on my Clipperton-L it blew the
fuse with a good bang. The switch picks between a tap and one side of the
power transformer secondary – tap being for CW. I forget but for SSB I
think the power supply supplies 2500V(+/-) and somewhere around 2000V(+/-)
for CW. Nothing obviously wrong that I could see with just the covers
off. I replaced the fuse and as soon as I turned the amp on it blew the
fuse again. I searched the web to see if someone had seen this problem
before and had written about it but I didn’t find anything. I have had
the amp since it was new (1984?) but I put a Harbach power supply board in
it about 2 years ago. As a long shot I thought I might ask here if anyone
had seen a similar problem before I try to troubleshoot this.
73, Larry W6NWS
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