[ARC5] Command Set Field Day

[Kenneth G. Gordon]

On 1 Jan 2013 at 17:35, hwhall at compuserve.com wrote:
 
>  Would a simple Q-multiplier help the selectivity enough?

Well, it sure wouldn't hurt. However, the things are at least 9 KHz wide at 
their narrowest, as I remember it. 

The IF frequency is 2830 KHz, and that is pretty hard to narrow down with 
conventional IF circuits.

> I see a
>  1-transistor (old PNP type) Q-mult in the 1964 ARRL Handbook.

Yes. I have seen that one. As I remember it, that one will peak a signal, but 
won't notch one as most tube-type "Q" multipliers will.

> Battery
>  powered and a single coax lead to an i.f. tube plate. The article was
>  for a 455-500 kHz i.f. but that can be altered I imagine.\

Yes. Of course.

Ken W7EKB