Radios - 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.
Here's what it looked like while I was working on it. It works very well now.
winter Vintage Electronics Expo
is on Feb 1, 2020 at the Costick Center, 28600 Eleven Mile Rd, Farmington Hills, MI