Re: [Amps] Clipperton-L question

["Carl" <km1h@jeremy.mv.com>]

I dont see how it can be the transformer since all 3 HV leads are always 
"hot" and the fuse only blows in SSB.
Something on the PS board could be the problem and all that is easy enough 
to test.
Carl
KM1H


----- Original Message ----- 
From: "Larry" <lknain@nc.rr.com>
To: <amps@contesting.com>
Sent: Wednesday, September 11, 2013 4:34 PM
Subject: Re: [Amps] Clipperton-L question


> 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@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@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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