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Re: [Amps] dual section cap

To: "Jim Garland" <>, <>
Subject: Re: [Amps] dual section cap
From: "Carl" <>
Date: Wed, 25 Jun 2014 21:20:37 -0400
List-post: <">>
OK that explains it Jim, I thought you bought it with those markings on it.

The poor response on the small section shows it wasnt designed for a good minimum capacitance which would be a problem on 10M with several tubes.

I got one of those from OEP as a "sample", rebuilt it with a bit less C per section but 6pf min C on the small one, returned it, and had them make several runs for me of 10-20 at a time. They sold well.


----- Original Message ----- From: "Jim Garland" <>
To: "'Carl'" <>; <>
Sent: Wednesday, June 25, 2014 7:07 PM
Subject: RE: [Amps] dual section cap

I remeasured the cap, and the two sections are 17-63pF and 24-316 pF, pretty
much what I had measured before N years ago. A single section cap on the
same frame would be 379 pF, or maybe a smidgen more since there would be
coupling between two plates that are separated in the dual-section version.
I used a good quality cap meter and compensated for the lead capacitance.
Jim W8ZR

-----Original Message-----
From: Carl []
Sent: Wednesday, June 25, 2014 4:00 PM
To: Jim Garland
Subject: Re: [Amps] Buck-Boost Transformer Selection

Jim, that OEP cap of yours got me looking and it appears that somebody
the full value for that frame. IE; the Cardwell 154-10 is rated at 347pf
that frame length was used for the dual section.


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