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What's Wrong With My Filament Circuit?
#1

Same 40-190.
http://www.nostalgiaair.org/PagesByModel...013339.pdf
I have about 9Vac on my filament circuit unloaded. But when I install the #47 dial lamp in its socket my voltage drops off into the mV range. The socket isn't shorted and has the same 9Vac on it until I install the lamp. I'm just getting the set checked out after a full restoration. The only tube installed is the rectifier so I could look at those voltages. They're good.

But what am I not seeing in my dial lamp/filament circuit? The lamp socket completes the circuit to ground. My ground is good. Icon_confused

EDIT: With my power transformer filament leads isolated I read an open across them. This isn't good but why do I see 9Vac when it's powered up?

Pepper

"It's Nice To Be Nice To The Nice"
Major Frank Burns Mash 4077th


Messages In This Thread
What's Wrong With My Filament Circuit? - by Pepperoni - 10-13-2011, 11:49 AM



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