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Old 24th Nov 2022, 10:21 pm   #2
SiriusHardware
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Join Date: Aug 2011
Location: Newcastle, Tyne and Wear, UK.
Posts: 11,586
Default Re: ICOM IC-M21 Mystery part

It's almost certainly a one-shot thermal fuse which, if it is, did exactly what it was designed to do (went open circuit / high resistance when the batteries got too hot).
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