Philco 37-630T only buzzes - Printable Version

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+--- Thread: Philco 37-630T only buzzes (/showthread.php?tid=17781)

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Philco 37-630T only buzzes - Tucker - 01-14-2018

I just got done with the recap of this radio and when I powered it up on a Variac I only get a faith buzz out of the speaker if the volume control is up most of the way.  I touched the grid caps on top of the tubes that have grid caps on top and only two make noise. The 6Q7G makes a buzz thru the speaker and the 6K7G (if amp) makes a click thru the speaker. The 6A8G (detector) and the 6K7G (rf) make no buzz at all.
I re-tested the tubes on my tester and they're good. Th rectifier and output tube do get warm and the transformer stays cool.
I'm new to troubleshooting a Radio this old - only worked on AA5's before this.  Would the next step be checking the voltages ? Or am I overlooking something simple?

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RE: Philco 37-630T only buzzes - morzh - 01-14-2018

Start checking continuity of the RF coils. All of them.

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RE: Philco 37-630T only buzzes - Radioroslyn - 01-16-2018

Update
Talked with Tucker did a few checks and found the shadowmeter wasn't plugged in, was still in the cabinet. Works swell now.

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RE: Philco 37-630T only buzzes - morzh - 01-17-2018

T'happens.

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