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Champion SPR-910 Spark plug radio
Champion SPR-910
AC operated Spark plug radio. 8 transistors, 1 diode, 1 thermistor and 1 silicon diode. Output 250 mw.
RIC Japan. R I C SPR-B403-110-B PAT.

Champion SPR-910 Spark plug radio
Champion SPR-910 Spark plug radio PC board
Here's what it looked like while I was working on it. It works very well now.
Michigan Antique Radio Club (MARC)
The winter Vintage Electronics Expo is on Feb 1, 2020 at the Costick Center, 28600 Eleven Mile Rd, Farmington Hills, MI
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