[Boatanchors] GREAT deal on eBay!!!

[Tom Chesek]

Its a longshot but the only possible useful purpose for these caps that I 
can think of would be to restore an old radio to original "appearance" for 
display purposes only assuming the old radio had been repaired or updated in 
the past with more modern components.

Tom K3TVC


----- Original Message ----- 
From: "Alex Whitaker" <ehscott at sbcglobal.net>
To: <W9RAN at oneradio.net>
Cc: <boatanchors at mailman.qth.net>; <jfor at quik.com>
Sent: Friday, December 18, 2009 11:20 AM
Subject: Re: [Boatanchors] GREAT deal on eBay!!!


They may check good for now on the cap checker, but it has been my 
experience that they won't stay that way (basically what you stated). I used 
to try to get by with replacing bypass caps that had B+ on them and coupling 
caps in the audio section. That worked for a while, but, eventually, the 
radio would start to crap out a bit at a time as it was played.

I think your idea for saving them and selling them to the low oxygen content 
speaker wire crowd is a great idea. When I saw what Black Beauties were 
going for on Epay, I about spit out my pancreas. I've still got a few brand 
new ones that I need to put on there.

73,

Alex
AA9XY

--- On Fri, 12/18/09, Robert Nickels <ranickel at comcast.net> wrote:


From: Robert Nickels <ranickel at comcast.net>
Subject: Re: [Boatanchors] GREAT deal on eBay!!!
To: "Alex Whitaker" <ehscott at sbcglobal.net>
Cc: jfor at quik.com, boatanchors at mailman.qth.net
Date: Friday, December 18, 2009, 11:12 AM


Alex Whitaker wrote:
> It would be interesting to see that stats. However, I will predict 99-100% 
> bad.
>
Maybe so Alex, but "badness" is kinda relative. I've started replacing the 
black beauties and such just out of an abundance of caution (and a desire to 
not have to go back and re-fix something I've already "fixed"), but I run 
quite a few across my Sprague TO-6 and find that probably 70% check "good 
enough", i.e. they're in the ballpark for capacitance and have leakage of 
less than 2ma or so (my rule of thumb) at rated voltage. But based on my 
anecdotal data, they *all* leak, and it's just a question of whether the 
process will continue to the point where it adversely affects circuit 
performance or causes component failure. Obviously a leaky paper cap used 
for, say, audio coupling will have a much greater impact on performance than 
one used as a cathode bypass.

Still, I'm tossing the cut-outs into a container in hopes of some day making 
myself rich selling them to some audiophoole on eBay ;-)

73, Bob W9RAN

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