{Collins} Re: KWM-2A Restore Help Needed (New Member)



----- Original Message ----- 
From: "W. Harris" <nbcblue@xxxxxxxxxxx>
To: <collins@xxxxxxxxxxxxx>
Sent: Friday, December 07, 2007 3:13 PM
Subject: {Collins} Re: KWM-2A Restore Help Needed (New Member)


>
>
>
> >From: "Bill  Carns" <wcarns@xxxxxxxxxxxxx>
>
> >By the way, the whole use of a variac is controversial unless you go
really
> >slowly. You have no way of monitoring the leakage current in the caps and
> >particularly in any individual cap. There is a mil spec on reforming caps
> >and you should at least read this to see what the issues are. I always
try
> >and isolate the main caps and do them that way to the mil spec which
> >requires the cap to be reformed up to the maximum rated voltage, not the
> >working voltage. If you think about it, if the cap is badly depolarized,
> >reforming just to the working voltage does not really finish the job.
>
> In my hobby of restoring vintage radios, I have attempted to reform old
> electrolytic capacitors on several occasions, and in my humble opinion it
> just isn't worth the trouble. I have had too many fail later. Why take the
> chance on a old capacitor that is likely to fail and maybe take an
expensive
> transformer with it when new caps are very expensive and easy to replace.
If
> one is a purists, the guts of the original capacitor can be removed and
new
> caps installed inside to keep the original look.
>
> Bill - K5MIL
>
>
> .
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> .
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.
SHARE THE FUN: JOIN THE COLLINS COLLECTORS ASSOCIATION TODAY !
      http://www.collinsradio.org/membership/    -paypal accepted-
.
 NETS: Tues & Thur: 3.805 MHz-2000 Central + Fri: 3.895 MHz-2000 Pacific
  SUNDAYS: 14.263 MHz-2000 UTC  +  AM Net: 29.050 MHz-1200 Central
       1st Wednesday AM Net 3.880 MHz-2000 local (ET, CT, MT, PT)





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