[Amps] Motor-Driven Caps

Floyd Sense fsense at copper.net
Sun Jun 12 22:52:32 EDT 2005


I've had a remote tuner in operation (dual balanced L design) for 3 years 
now and have had good success using surplus gearmotors to drive the caps.  I 
bought the first set of two on eBay, but now Jameco has a wide variety at a 
low price.  If you use an air variable without stops, the controls are a bit 
simpler than if you use a vacuum variable.  I use a Jennings vacuum variable 
obtained on ebay and built limit switch circuitry to avoid turning the cap 
against its stops.  It's easy to find the parts to assemble the motor driven 
cap yourself - very difficult to find something already assembled.

K8AC

----- Original Message ----- 
From: "Ronald Smith" <kb7zr at hotmail.com>
To: <Amps at contesting.com>
Sent: Sunday, June 12, 2005 8:30 PM
Subject: [Amps] Motor-Driven Caps


> I'm building a remote tune for an inverted L and am looking for a source 
> for a motor-driven cap. Need something @ 1000pf. Any info would help. 
> Thanks, Ron Smith
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