[Amps] Clipperton-L question

[Larry]

Thanks guys for the input.

I looked at the switch and it didn't have any obvious problems but I figured 
a better inspection is required.

Disconnecting the transformer leads was on my list as well. A new 
transformer is about $300 unless I can find a used one that still works. It 
also looks like a bear to get out.

The filter caps are only a couple years old which doesn't guarantee that 
they are still good of course. I had a Henry 1KD5 years ago that blew a cap 
within a year. A bit more spectacular than this one. The Henry arced through 
a 0.25 inch phenolic board among other things and didn't blow a fuse!

Since I had replaced the power supply board I thought maybe there was a wire 
I didn't get on correctly and when I turned the switch it finally moved 
enough to short or arc. I didn't see any obvious arc sites or wires out of 
place which is why I sacrificed another fuse.

-----Original Message----- 
From: Carl
Sent: Wednesday, September 11, 2013 2:58 PM
To: Larry ; amps at contesting.com
Subject: Re: [Amps] Clipperton-L question

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 at nc.rr.com>
To: <amps at 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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