37-60 Started repair again
Posts: 1,136
Threads: 11
Joined: Jul 2020
City: Greenlawn
State, Province, Country: NY
Chas, great info on the hf bypass cap. Jordan, I agree with Chas, that if you think that the speaker impedance is really that low, shoot between 7 and 10K for the transformer primary, more toward the 10K.
One other thing. If the radio was operated with an open output transformer primary, the 6F6 may be trashed. With the primary open, the screen takes all the current, and it was not designed to do so. The screen will glow bright yellow to almost white hot and eventually short to the suppressor or to the control grid, both being really BAD (burning out the cathode resistor, the field coil, the power supply, etc.). I saw this on a Philco 89 with a nice Globe 42. Fortunately, I caught it in time.
"Do Justly, love Mercy and walk humbly with your God"- Micah 6:8
"Let us begin to do good"- St. Francis
Best Regards,
MrFixr55
Messages In This Thread
RE: 37-60 Started repair again - by MrFixr55 - 05-18-2023, 11:52 PM
Users browsing this thread: 10 Guest(s)
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Recent Posts
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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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An attempt to remove the Field Coil from a G speaker
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| Arran
Yes, this is my plan for now and what do I got to lose, this is not even the speaker from this radio, but one o...morzh — 10:44 PM |
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An attempt to remove the Field Coil from a G speaker
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| Mike;
I would unwrap the field coil, and see if maybe there a break near one of the ends, like where the coil wire att...Arran — 10:23 PM |
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An attempt to remove the Field Coil from a G speaker
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