Posts: 1,411
Threads: 71
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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Recent Posts
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Rogers Majestic R-646
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| Vlad;
I was just reminded of something else, I'm not sure why but many Rogers built sets do seem to have open primari...Arran — 04:40 PM |
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Rogers Majestic R-646
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| Thanks RpdB
I don't think there's much difference with interstage transformers of different models other than dimersion...Vlad95 — 03:27 PM |
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Rogers Majestic R-646
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| Vlad;
I looks like your set has the same problem that mine did, both a bad output transformer, and a bad audio inters...Arran — 03:21 PM |
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Rogers Majestic R-646
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| Ouch! Not often the secondary takes a hit. Wish there was a better solution. I have a good interstage transformer but it...RodB — 02:59 PM |
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Rogers Majestic R-646
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| By the way, the bypass you suggested is a rare solution in some circuits.
For example, this schematics solution is used...Vlad95 — 01:43 PM |
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Rogers Majestic R-646
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| No, you are wrong, because you did not know the details.
Unfortunately, only ONE winding out of six is intact in both t...Vlad95 — 01:14 PM |
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Rogers Majestic R-646
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| The output 45s are still in push-pull because the transformer secondary winding is still in the grid circuit providing o...RodB — 11:52 AM |
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Rogers Majestic R-646
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| Thanks RodB for the help.
But this is not a real solution to this situation, not even a temporary one. Because the firs...Vlad95 — 11:34 AM |
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Philco Model 16 wiring question
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I was going to check the voltages as you suggested and hooked it up to my dim bulb. It appears I have a short. The bul...bobclausen — 10:34 AM |
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Rogers Majestic R-646
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| You can bypass the interstage transformer by disconnecting the primary, connect a load resistor of about 10k - 20k to th...RodB — 09:40 AM |
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