Many thanks to all who replied, both on-list and off. Apparently these things
are available even if I couldn't find them. I guess I need to improve my
research skills, and maybe make more visits to hamfest flea markets. In any
case, once again the group on this reflector came through. My thanks.
73 all,
Ted, KN1CBR
------------------------------
Message: 14
Date: Sat, 16 Jun 2018 23:57:06 -0700
From: Walter Underwood <wun...@wunderwood.org>
To: Elecraft Reflector <Elecraft@mailman.qth.net>
Subject: Re: [Elecraft] OT - Source for Air Variable Capacitors
Message-ID: <506d8e2a-6eb9-45ad-b905-45c4e448a...@wunderwood.org>
Content-Type: text/plain; charset=utf-8
For a magnetic loop, the contact resistance of the wipers on typical air
variable capacitors causes big losses. That is why he?s specifically looking
for vacuum, butterfly, or split stator variable capacitors.
The MFJ butterfly capacitors are reasonably priced, at $70 and $90. MFJ
uses them in the mag loop tuners they sell.
wunder
K6WRU
Walter Underwood
CM87wj
http://observer.wunderwood.org/ (my blog)
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