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Checked the voltages - seem OK. Not right on the money but then I am using a variac plus a modern Fluke DMM, plus my speaker's field coil is 500 Ohm and not 1.5kOhm, so.....I don't sweat it, they are within the ballpark.
All coils are OK and the DC resistances are within reason to what the schematic names for them.
The 6A7 would be the easy usual suspect except somehow I feel that when I buy a new one it will behave the same. OK, will spend 10 bucks......
Sadly none of my other radios has a 6A7 in it; I do have a 6A8 but the pinout is different.
Oh, I even pulled a couple of stations around 10 MHz on the FBC, and one around 6.5MHz (where the oscillation does not work) which tells me one of the tubes was acting as an attenna all on its own.
Messages In This Thread
RE: 38-15 Restoration - by morzh - 04-22-2013, 05:24 PM
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Recent Posts
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Philco 42-345 Restoration/Repair
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| Please tell me this was it, I replaced resistor 27 and it's playing on the broadcast band. I am afraid to change the ban...osanders0311 — 06:12 PM |
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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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