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
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.