[R-390] Was - AGC voltage issue - Now - Original cap kit by Birmingham Dave.

[David Wise]

I have a little box from Senco, called the "Up-Down" that uses that idea.  A three-position switch puts the 12V winding in phase, out of phase, or bypassed.  It's very convenient.  But I still expect to build a special-purpose box sometime, to combine ICL, bypass relay, and stepdown-auto.

Dave Wise

________________________________________
From: R-390 [r-390-bounces at mailman.qth.net] On Behalf Of Bob Camp [kb8tq at n1k.org]
Sent: Wednesday, September 17, 2014 6:29 PM
To: Barry; 390 list
Subject: Re: [R-390] Was - AGC voltage issue - Now - Original cap kit by        Birmingham Dave.

Hi

If you want to step down to 110 V, something like a 12V filament transformer hooked up as an autotransformer is a much cheaper / smaller / (likely) more reliable solution. The first reliability gotcha with a Variac is bumping the setting. The second gotcha is having something strange come in contact with the exposed wiring. Yes with care and custom packaging you can avoid both for years and years. Why bother - just wire up a still cheap fixed transformer. $12 at Radio Shack. Slightly less at Mouser ….

Bob