[Boatanchors] Metalized Polyethylene Film

[Rodger Singley]

David,

The poly film caps are highly inductive at RF and aren't suitable.

I have used surplus Russian RF caps (many look more like a hockey puck than a doorknob)for several projects.  The quality seems to be very good.  There are several ebay sellers that usually have them and I believe one or more of them ship from the U.S.

Rodger WQ9E

-------- Original Message --------
> From: "David C. Hallam" <dhallam at knology.net>
> Sent: Friday, January 02, 2015 9:14 AM
> To: boatanchors at mailman.qth.net
> Subject: [Boatanchors] Metalized Polyethylene Film
> 
> Are high voltage metalized polyethylene film a substitute for disk 
> ceramic capacitors in the output network of a Invader 2000 (pair of 
> 4-400A)?  Johnson call for 2500V mica.  I haven't looked through my box 
> full of old mica yet to see if I have any of the correct values.  Is 
> there a source for HV mica?
> 
> David
> KW4DH
> 
> -- 
> There are two possible outcomes: if the result confirms the hypothesis, then you've made a measurement.
> If the result is contrary to the hypothesis, then you've made a discovery.
> Enrico Fermi
> 
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