[amsat-bb] Re: PS4A polarity switcher

Alan P. Biddle APBIDDLE@mailaps.org
Sun Aug 20 08:51:12 PDT 2006


Scott,

Switchers normally use a 12 DC relay.  Unpowered, you get one direction,
powered the other.  Which is the unpowered default can depend on the
manufacturer, and/or how you wire it up.  Cushcraft has the installation
drawings on their web site, but I wasn't able to find the default value.

Alan
WA4SCA






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