05-12-2016, 09:23 PM
It's not dual grid like a dual gate fet!
One signal needs to drive both grids in phase and the other signal drive them in antiphase, so a centre-tap RF transformer feeding g1a and g1b and then audio to centre tap might work?
Though to be osc/mixer, you need an audio transformer driving g1a & g1b and the g1a g1b both capacitive coupled to osc transformer. Use a pair of 2M2 resistors for grid leaks or one to audio transformer centre tap.
RF out(or IF if RF mixer + LO, or audio out if a BFO) on the anode.
One signal needs to drive both grids in phase and the other signal drive them in antiphase, so a centre-tap RF transformer feeding g1a and g1b and then audio to centre tap might work?
Though to be osc/mixer, you need an audio transformer driving g1a & g1b and the g1a g1b both capacitive coupled to osc transformer. Use a pair of 2M2 resistors for grid leaks or one to audio transformer centre tap.
RF out(or IF if RF mixer + LO, or audio out if a BFO) on the anode.
