1973 Radio Shack Science Fair AM radio model RK-111 repair @retrochad

1973 Radio Shack Science Fair AM radio model RK-111 repair @retrochad

Uploaded July 2011 | Updated September 2026, 4 days ago

This radio had a bad interstage transformer and I got it working by replacing the primary winding with a resistor and capacitor.

1973 Radio Shack Science Fair AM radio model RK-111 repair

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1973 Radio Shack Science Fair AM radio model RK-111 repair