Link coupling to a rotary incuctor
 

I'm building a balanced line antenna tuner and have settled on link coupling
in order to eliminate the balun from the circuit.

I have a big rotary inductor out of an old Murch 2000A and would like to use
it as the output link. I've decided on a variable (tapped) input link. I'm
wondering if anyone has done this and what technique they used to mount the
input link (i.e., how to get it close enough for effectively coupling).

This is not a good design. The tapping in generally reserved for the output
side of the tuner with the input being "relatively" fixed with only a little
bit of adjustment, via a swinging link or a series capacitor. You need a wider
impedance matching range on the output side, not the input side.

73s,

Evan

This is not a good design. The tapping in generally reserved for the output
side of the tuner with the input being "relatively" fixed with only a little
bit of adjustment, via a swinging link or a series capacitor. You need a wider
impedance matching range on the output side, not the input side.

73s,

Evan