[ARC5] Command Set Field Day

[hwhall at compuserve.com]

Hi, Ken! The Handbook article said it would peak and notch, admitting that it seemed illogical, but it worked. It said the peaking was not as pronounced in effect as the notch mode. Perhaps a q-mult at the higher 2830 khz isn't as effective either. Might be worth a try someday, though.

Wayne
WB4OGM



-----Original Message-----
From: Kenneth G. Gordon <kgordon2006 at frontier.com>
To: hwhall <hwhall at compuserve.com>
Cc: ARC-5 List <arc5 at mailman.qth.net>
Sent: Tue, Jan 1, 2013 4:06 pm
Subject: Re: [ARC5] Command Set Field Day

 
 
 
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