Philips India radio 15RB697 (Algemeen)

door Piet van der Pol , Alblasserdam, 02.12.2020, 14:03 (1452 dagen geleden) @ Pandu Rajan

Hallo Pandu,

Maybe this extra coil and capacitor is necessary for a more constant oscillator voltage over the whole band. You see also an extra resistor (22 Ohm) in the circuit, that can be necessary for the same purpose. With the changes you have made, the circuit will oscillate probably more easy, but with a more variable voltage. This can give more conversion distortion. So maybe you need a new B1 mixer tube.

Piet