1Ж42А. As a mixer/Frequency changer????

[Amie]

Hello all.

I find these rod valves fascinating.

Just one question though, I've seen diodes used as in Trevor's diagram occasionally, But what is its purpose? Is it acting as a clamp?

(There is no DC continuity at its anode so is therefore just floating?)

Would the circuit still work if it were not there?

A suggestion would be either another diode anode to ground, cathode to first diode anode, Mikes peak detector, or a choke in the same position to provide DC continuity and block RF.

Thanks.
Amie.