“Someday” i will revisit this. I decreased the capacitance by i don’t remember how much, and the IFs took off. As in, oscillation.

I think there will be a practical lower limit which wouldn’t enter into a fixed frequency IF: the trueness of the tracking of the

individual tuned circuits. This is assuming you want to retain the variable IF feature; but it seems from my reading here that

most ? users leave it set to 500 kHz. I like the “incremental tuning” feature kind of like on the Eddystone 830.  

I have wondered the same thing about the ARC-2. This radio has a very odd design, 2 or is it 3 RF amps. I came to the conclusion

that this is because the radio was intended for remote control operation only, and applying AGC to these multiple stages was

the way to control, even out gain when subjected to signals of greatly varying strength. I am wondering how well those stages

will track when the coupling caps are lowered. ( ARC-2A models only, for the cognoscenti. ) I thought about also a q multiplier

with negative resistance without tuned circuits, using only the transceiver’s tuned circuit, and using maybe a spare fuse opening

on the front panel with a small knob so that the overall effect looked pretty much original. Maybe.

-Hue Miller