37-60 Started repair again
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State, Province, Country: NY
Varistors are useful on units with solid state rectifiers and high value caps to limit inrush current. Common to add these to such units like the Fisher 400, 500 and 800 series Hi-Fis from the late 1950s to early 1960s.
Only issue that I have with using a matching transformer as opposed to a standard audio output transformer is that the 70V matching transformers are not designed for a DC component. If you really try to use one, use a 70V primary. I don't think that you are gonna get the turns ratio and current capacity needed from a 25V Unit, but I defer to Ron Ramirez as he has actually done it.
"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 - 05-20-2023, 12:31 PM
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Recent Posts
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Part numbers to model cross
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| Jim,
We have this index put together by Dale Cook but I don't think that is quite what you are looking for.
The Parts...klondike98 — 09:37 PM |
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Philco Model 38-7: what caps & resistors do fail typically?
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| Yep the dim bulb test is OK but I'd definitely replace all those electrolytics before I did it. Since those #47 conden...klondike98 — 09:18 PM |
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Philco 42-345 Restoration/Repair
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| The resistor is a 2.2 Meg, it was the last one I hadn't replaced. The broadcast is coming in after replacing it.osanders0311 — 09:09 PM |
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Philco 42-345 Restoration/Repair
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| What does the resistor measure? I think it should be 3.3 Meg.
If the oscillator coil has continuity and the resistanc...RodB — 09:03 PM |
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Philco Model 38-7: what caps & resistors do fail typically?
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| Good idea to check the coils... then I'll get hold of an incadescent light bulb and see what happens when the unit is sw...Musaeum — 08:49 PM |
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Philco 42-345 Restoration/Repair
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| I have that same set, ain't too much shortwave I like anyway.....it is a good AM DX set. PaulPaul Philco322 — 08:32 PM |
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Philco Model 38-7: what caps & resistors do fail typically?
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| Welcome to the Phorum, Martin! Open a new thread in Philco Electronic Restoration when you begin working on your 38-7. ...GarySP — 08:28 PM |
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Philco Model 38-7: what caps & resistors do fail typically?
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| Welcome to the Phorum!
:wave:
Here's the schematic for that radio from our digital library:
Something to do bef...klondike98 — 08:05 PM |
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Philco Model 38-7: what caps & resistors do fail typically?
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| Hi all,
on vacation in Montreal, a friend of mine showed me a Philco Model 38-7 console radio from the 30ies. Mechan...Musaeum — 07:21 PM |
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Part numbers to model cross
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| I looked thru the documents and did not see one. Might have missed it though.Jim Dutridge — 07:16 PM |
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