Posts: 1,199
Threads: 49
Joined: Oct 2017
City: Allendale, MI
The AVC by itself is worth the mod. Certainly won't be original any more, but should perform much better. I have no 35's so I just emailed Bob to see if he has 6! Also need a couple of 500K pots. Just did some reading on diode detectors in tube radios. they can be made to perform better than the original tube diodes but it takes a bit of work with forward biasing and temperature compensation. Too much for this purpose. I'll just stick with the germanium diode though this guy said it was not the best for tube radios. He had a lot of math to explain why. More than I wanted to plow through!
Messages In This Thread
RE: Philco 570 - by rfeenstra - 05-11-2019, 10:32 PM
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Recent Posts
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Philco 42-345 Restoration/Repair
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| So far still no broadcast, I am posting pictures of #14 Oscillator and also a resistor #27 which connects to an XXL tube...osanders0311 — 04:02 PM |
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Part numbers to model cross
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| I believe there is that document, and I think we might have it in the Library.morzh — 03:29 PM |
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Philco 42-345 Restoration/Repair
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| Ok MrFixr55,
I have tried the DeoxIT D5 on the band switch and even though it has relieved the tension I felt when turn...osanders0311 — 11:11 AM |
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Part numbers to model cross
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| Is there a reference somewhere where you can punch in Philco part numbers and see what models those parts were used in?Jim Dutridge — 10:17 AM |
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Philco 42-345 Restoration/Repair
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| Hi OSanders,
Look carefully at the band switch. Turn it slowly and "wiggle" it around the desired band. ...MrFixr55 — 12:33 AM |
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5U4 vs 5Z4 tubes
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| I think that RCA and GE introduced metal tubes in the USA in 1936. I don't know if they were being made by RCA, GE or b...MrFixr55 — 11:20 PM |
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Philco 42-345 Restoration/Repair
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| Vlad95,
Thank you for the stringing guides and wow there are so manyosanders0311 — 06:01 PM |
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5U4 vs 5Z4 tubes
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| A pre war Hallicrafters, and an early one too, very nice! 1936 is pretty early for metal tubes too, which would explain ...Arran — 05:58 PM |
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Philco 42-345 Restoration/Repair
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| Thanks Rod,
"When you hear the background hiss and no station it usually indicates that the oscillator quit" ...osanders0311 — 05:52 PM |
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Philco 42-345 Restoration/Repair
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| RodB
:beerchug:Vlad95 — 10:22 AM |
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