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How bout wide banding this chassis?

Reason for asking is the low channels (below 26.765) will not lock on. I tried adjusting VCO but had no luck.


I read somewhere about removing C81 completely and replacing R84 with a 47k ohm resistor to widen it out for extra channels. Is this correct, or is there a better way other than messing around the balanced modulator IC?


The channel mod is kinda strange.

Pin 10 not cut but has a wire going to a spdt center off switch. Pin 11 track is cut with a wire on both sides of the cut going to a spdt center off switch. Then pin 12 is not cut and has a wire going to a spdt center off switch. Finally pin 17 has a wire coming off it to a spdt center off switch.


The channel mods I've seen calls for pin 10 to be cut, pin 11 not to be cut, and pin 12 to be cut.