[Hammarlund] Drift of Newer Hammarlunds? was Re: Old Hammarlunds

[Carl]

----- Original Message ----- 
From: "Kenneth G. Gordon" <kgordon2006 at frontier.com>
To: <Hammarlund at mailman.qth.net>; "Darrell Bellerive" 
<drbellerive.va7to at gmail.com>
Sent: Sunday, May 08, 2011 11:51 AM
Subject: Re: [Hammarlund] Drift of Newer Hammarlunds? was Re: Old 
Hammarlunds

One of the biggest problems for us today is the availability of TC caps. 
They
are very difficult to find in any quantity or variety now.

Ken W7EKB


The rule of thumb is to start with a N-750 cap that is 10% the value of the 
circuit C (fixed and variable), if you overshoot then reduce the value. Its 
not hard to find low value N-750's and play the series/parallel game. Since 
there is no DC in the circuit and RF volatges are low that opens up the 
choices. Ive often found a 3-5pf N-750 to get me where Im happy on the 
higher bands.
Low value 5KV RF doorknobs are often N-750 and of no use most anywhere else 
so the prices are cheap.....a little bulky but available.

Carl
KM1H