airline15

[Reece]

B+ det try 22-1/2, "regular" B+ try 45, and amp try 90. Does it have the built-in horn?

Edit: this may have the grid leak resistor next to the detector tube open. It might be one of the ones that fits in like a cartridge fuse. It should read a couple of megohms. If open, tack in a resistor around 2 megs.

[stusnyder]

Resistor ok. No horn built in, takes a external one.
Hooked it up like you said, don't get any sound. There is a transformer underneath, checked the windings and they seem intact.
There is also a square can under the chassis with 4 wires going to it. Looking at the photo, lower right is marked "P", lower left "+", top left "F", top right "G"
Is this some kind of capacitor??
A schematic would make things so much easier........

[Reece]

That box is an interstage audio transformer. P goes to plate of the first audio, + to B+ for that tube. G goes to grid of the second audio, F to its filament. With power off, check the two windings with your ohmmeter: P to +, and then F to G. Neither winding should be open. Often they are. There are small modern replacements to hide under chassis if the transformer is open. There is also a work around to get it going temporarily if needed.

[stusnyder]

They are both open, both sides. Whats the work around, the .047 cap, 1meg and 100k resistor trick???? Where would I hook these up?