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Re: World War II Capacitors




From: 	Malcolm Watts[SMTP:MALCOLM-at-directorate.wnp.ac.nz]
Sent: 	Tuesday, July 01, 1997 1:07 AM
To: 	tesla-at-pupman-dot-com
Subject: 	Re: World War II  Capacitors

Hi Alan,

> From:   Alan Sharp[SMTP:100624.504-at-compuserve-dot-com]
> Sent:   Monday, June 30, 1997 8:58 AM
> To:     INTERNET:tesla-at-pupman-dot-com
> Subject:    Re: World War II  Capacitors
> 
> Greetings,
> 
> I just aquired a couple of capacitors dated
> from 1945!
> 
> They are inscribed:
> Admiralty pattern 1059
> Condenser Mica 0.0011MFD +/- 5%
> Tests A) 6 Amps at 300 KC - 1 hour
> B) 28000 volts D.C.
> max wkg condition approx 80% test condition
> Year 1945
> 
> They are rectangular blocks about 2.5* 3.5 * 3
> inches. Bolt terminals on top.
> 
> I think that these will still be good and that
> 10 in // will perform as well as a 0.01uf 
> commercial capacitor at up to about 7kV AC. 
> The guy wants L5 for them (about $7).
> 
> Any comments - is this worth pursueing or should
> I stick to polythene and tinfoil.

Grab them, grab them, grab them........  I have been more than 
pleasantly surprised by performance of micas just recently. Those 
sound great for a very high-L primary.

Malcolm