10-13-2011, 10:49 AM
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.
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
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.
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
But already have the old one out which wasn't original to begin with and another from a parts set ready to go. 
Didn't like the one that was on there anyway. Someone had changed it and swapped the 84 rectifier for a 5Y3. The bad transformer was a 250-0-250 which I was told would work but the new one I'm putting on it is a little bigger and is 350-0-350. Had to remove 1/4" of chassis on the length but otherwise a good fit. 