Posts: 1,409
Threads: 72
Joined: Oct 2007
City: Linn Creek, MO
There is a couple of things you can do that don't require any test equipment. First, touch the center terminal of the volume control. You should hear a 60 cycle hum. If you hear the hum, you have proven that the output section and the power supply are working. Next, place a working radio next to your 42-365. with both radios turned on, tune the 42-365 to about 1000, tune the working radio to about 1455. Now, rock the dial on ether radio. You should hear a rushing sound or possibly a whistle coming from the working radio as it picks up the local oscillator of the 42-365. If you haven't already, double check all your work. Check the part values against the schematic and make sure each part that has been replaced is connected to the proper terminals. Make sure your solder connections are good. Take voltage measurements on all tubes and compare them to the service information.
Steve
M R Radios C M Tubes
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Need Help to ID this radio 11 tube Philco
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Thank you.
I went to your online library and found 2 schematics.
I will download and compare to components!Ken D. — 06:31 PM |
Need Help to ID this radio 11 tube Philco
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It is a 16B tombstone.morzh — 06:13 PM |
Zenith H725
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David - sorry, I reread your post and finally saw THD - now the % figures make sense. Thanks for explaining.
The PSU...EdHolland — 06:06 PM |
Need Help to ID this radio 11 tube Philco
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Hi Everyone,
New member but have been reading this for awhile for tips!
Vaccum tubes were before my time so bear with ...Ken D. — 06:03 PM |
My Philco 37-116 Restore
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Thank you MrFixR55, I appreciate your comments very much. I do not detect much hum if any so I will be staying with the ...dconant — 05:15 PM |
My Philco 37-116 Restore
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Hi DConant
Yes, you can replace chokes with resistors. You do stand the risk of increased hum. the solution is to inc...MrFixr55 — 04:23 PM |
Zenith H725
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1.7-3.9 %, a modified Sine wave inverter is around 25%. Most generators from big box stores run 10% at a 50% load. What ...David — 04:06 PM |
My Philco 37-116 Restore
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I am having a heck of a time doing the alignment on the AM band. I can't seem to dial in the 1500 KC oscillator. I can h...dconant — 03:35 PM |
Zenith H725
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David - I think I understand but what units are you discussing (Low of 1.7, high of 3.9)?
Budget constraints for Ham ...EdHolland — 01:43 PM |
My Philco 37-116 Restore
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You're doing great.
I wish I could be more involved, but my mind is right now preoccupied with the reason I am here in ...morzh — 12:21 PM |
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