The PHILCO Phorum

Hi guys,
I've been reading discussions but this is my first post.
I am restoring my first, a 37-89 that has been in the family since new. I have replaced resistors, all tubes with tested replacements, and capacitors (except micas). I had hoped for music but no luck.
I found I wasn't getting voltages on tube sockets. I opened the transformer and found wires had insulation falling off. I spliced each as close to the winding as I could and covered splices with heat shrink. Still nothing but hum.
What should the voltages from the transformer be? The transformer is Philco 32-7583 (with the rectifier 5Y4G on top).

Note: the rectifier tube had been replaced with a 5V4G and I bought a 5Y4G and replaced it. Are the pins the same? Should I suspect the socket has been rewired?
Any help or suggestions will be greatly appreciated, Herb

Herb

1. The information on the tubes is well available on the web, so instead of waiting for answers you could've simply do that:

Punch in "5V4G tube" in google and get this:
http://www.radiomuseum.org/tubes/tube_5v4g.html

Then do the same with 5Y4G and get this:
http://www.radiomuseum.org/tubes/tube_5y4g.html

Look at the pinouts:


You will see right away they are NOT the same.

5Y4G
[attachment=2635]

5V4G
[attachment=2636]

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Now you gotta be careful going back to original because God knows, the man who replaced it might've re-wired the circuit to accommodate the other tube and now the wiring might not work with the original.

Thank you very much for the info. I hope to be able to open it tomorrow and tinker.
I will let you know what I find.
Herb

The socket was still wired for 5Y4G (guess the other tube was just stuck in there). I am getting correct voltages but still not picking up any signals except switches and other interference.

Thanks for the tip, Herb