42-355 field coil gets very warm

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42-355 field coil gets very warm

Ron Ramirez
Silent Key

Posts: 13,776
Threads: 580
Joined: Sep 2005
City: Ferdinand State, Province, Country: Indiana

07-03-2008, 10:28 AM

Welcome, Pilkco! Icon_smile

Glad to have you aboard.

Just thought I would mention that while some Philco field coils may run warm (especially those made after 1938), they should never run HOT! If they do, a problem is indicated.

And as others have mentioned here, today's line voltages are higher than they were during radio's Golden Age; so transformers will run warmer (sometimes hotter). It is always good to reduce the line voltage through use of a buck/boost transformer set-up or dropping resistor, if you plan to run your radio a lot.

The voltage here varies between 125 and 128...the power transformers of various radios I have had here vary from barely lukewarm to very hot at full line voltage. My friend Ed Locker sent me a bucking transformer setup, mounted in a metal enclosure, which reduces the line voltage to 110, and makes those power transformers run cooler.

Finally, whenever I have to have a power transformer rewound, I ask for a primary of 130 volts in order to eliminate the hot transformer problem.

--
Ron Ramirez
Ferdinand IN

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42-355 field coil gets very warm - by Guest - 06-28-2008, 07:44 PM

[No subject] - by Texasrocker - 06-29-2008, 01:33 AM

[No subject] - by Guest - 06-29-2008, 11:26 AM

[No subject] - by etech - 06-29-2008, 05:48 PM

[No subject] - by Guest - 06-30-2008, 10:00 PM

[No subject] - by Texasrocker - 07-01-2008, 01:21 AM

[No subject] - by justlrnin - 07-01-2008, 07:41 AM

[No subject] - by Ron Ramirez - 07-03-2008, 10:28 AM

[No subject] - by etech - 07-03-2008, 09:00 PM

[No subject] - by Guest - 07-04-2008, 01:46 PM

[No subject] - by etech - 07-04-2008, 06:07 PM

[No subject] - by Ron Ramirez - 07-04-2008, 06:57 PM

[No subject] - by BDM - 07-04-2008, 07:37 PM

[No subject] - by etech - 07-04-2008, 09:06 PM

[No subject] - by Texasrocker - 07-12-2008, 03:11 AM

[No subject] - by etech - 07-12-2008, 09:50 AM

[No subject] - by justlrnin - 07-14-2008, 06:36 PM

[No subject] - by FStephenMasek - 07-14-2008, 06:50 PM

[No subject] - by exray - 07-14-2008, 08:57 PM

[No subject] - by etech - 07-14-2008, 09:27 PM

[No subject] - by BDM - 07-15-2008, 12:41 AM

[No subject] - by exray - 07-15-2008, 02:47 AM

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