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Philco 40-120C Restoration
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| I found the problem. I had some faulty wiring on the field coil. Unfortunately, now I'm getting low voltage on the plate...bluecap — 05:21 PM |
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Philco 89 indicator light.
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| Is there some trick to getting the indicator lamp evenly spaced between the frequency bands? Seems like no matter what I...Jim Dutridge — 04:37 PM |
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Philco 40-120C Restoration
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| Hi David,
Check the cathode bias resistor, it may have changed value. That will affect grid bias, etc. Also, verif...MrFixr55 — 03:26 PM |
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Philco 91 Restore Code ??
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| Hi DConnat,
Yes, the 42s are in Pentode Mode, cathode bias. I am using the schematic from the Philco Library, Link ...MrFixr55 — 03:04 PM |
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Philco 40-120C Restoration
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| Not my radio just trying to help. DavidDavid — 02:48 PM |
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Philco 91 Restore Code ??
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| Thanks Rod. Since the screen grid is not tied to the plate then my tubes are pentode right? I see the candohm ties to th...dconant — 02:29 PM |
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Philco 91 Restore Code ??
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| Yes, you can look at the schematic. When the output tube screen grid is connected directly to the plate then it's wired ...RodB — 01:51 PM |
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Philco 91 Restore Code ??
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| Can someone tell me if my 42 tubes are connected triode or pentode in fixed or cathode bias? How could I tell by looking...dconant — 10:47 AM |
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Philco 40-120C Restoration
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| Hello David,
that is great news about the tubes source being local !
Sounds like you got good start on the radio .
...radiorich — 09:41 AM |
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An attempt to remove the Field Coil from a G speaker
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| Mike;
I've only run into a speaker with an open filed coil twice, and they were on newer speakers from the 1940s. One ...Arran — 12:48 AM |
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