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Old 12-23-2018, 10:54 PM
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Zsuttle Zsuttle is offline
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Location: Virginia Beach, VA
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Micamold Resistors

Anyone seen one of these? I never knew micamold got into the resistor business. This one was supposed to be the 205 ohm cathode bias resistor for the output tubes on my Grunow 1191. It was open and driving the B+ voltage through the roof. It's similar in size to on of the mica caps in the set, and in small letters says resistor.
Hopefully this might save someone else the trouble it brought me.

Micamold cap and resistor


Happy Holidays,
"If it isn't broke, you aren't trying hard enough"
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Old 12-24-2018, 09:53 AM
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Electronic M Electronic M is offline
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Location: Pewaukee/Delafield Wi
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My Zenith bugeye alarm clock has one that is still good. Quite true that you don't see many...No matter how good I get* I still find the occasional tricky problem that pulls me out of auto-fix and into (sometimes extended) full brainpower troubleshooting mode.

*Things I used to be bad at I've gotten good at. Like for example last night I fixed two record changers that hadn't moved for decades one had been dropped earlier that night (that is what I get for propping it up with a tool I frequently need while examining the motor wiring for a mod to it's amp) and the arm pivot broke and spindle bent on top of its 70-year-old petrified grease troubles and I still got it working properly and did a good job of hiding evidence of my repairs.
Tom C.

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Reading between the scan lines since the mid 2000's.
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Old 12-24-2018, 05:07 PM
Titan1a Titan1a is offline
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Remember: micamold parts have ZERO mica and should be replaced. Especially the caps!
Rick (Sparks) Ethridge
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Old 03-16-2019, 03:16 PM
Tim Tress Tim Tress is offline
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They did make mica capacitors, but got a bad name for their flat molded-paper caps that saw extensive use in the 1940s and 1950s. All of those are leaky now. Those molded resistors were used heavily by Zenith, Midwest, Emerson, and a few other makes; often, they are still OK.
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