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GeoffK · 15th Jul 2019, 4:42 pm

The only electrolytic capacitor in the RF side that could affect the output of the first IF transformer is 10uF C11 part of the AGC smoothing that could pull down the bias on TR2 the first IF transistor.
C22 100uF TR4 emitter bypass capacitor is part of TR3 base bias via the second IF transformer secondary so could affect TR3.

15th Jul 2019, 4:42 pm	#20
GeoffK Heptode Join Date: Mar 2016 Location: Essex, UK. Posts: 602	Re: Roberts R200 radio not functioning. The only electrolytic capacitor in the RF side that could affect the output of the first IF transformer is 10uF C11 part of the AGC smoothing that could pull down the bias on TR2 the first IF transistor. C22 100uF TR4 emitter bypass capacitor is part of TR3 base bias via the second IF transformer secondary so could affect TR3. __________________ *Geoff* Last edited by GeoffK; 15th Jul 2019 at 4:47 pm.