[AMRadio] Breaker Info

Rick Brashear rickbras at airmail.net
Mon Dec 4 11:51:11 EST 2006

Maybe the center is for filament voltage only and when you go to the 
bottom you have filament and B+...?

Jack Schmidling wrote:

> I need some help understanding the main power switch on my powersupply.
> I posted a pic to http://schmidling.com/breaker.jpg
> In the on position, the top and the bottom terminals are connected. 
> This makes sense as this is one side of the AC line.
> I can not figure out what the center terminal is supposed to do.
> The only clue is the one of those black wires goes to a small 
> transformer for the pilot light.  The other lead goes to the bottom 
> terminal.  So center and bottom must be 110V but seems like it is on 
> all the time.
> The device is a 15A Heinamann breaker but I can not read the part number.
> Any help?
> js

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