[CQ-Contest] Q-multiplier

James Headrick headrick at radar.nrl.navy.mil
Tue Nov 27 03:07:17 EST 2001

The Q-Multiplier as most people used it employed positive feedback around 
receiver IF stage(s).  With just the right amount of feedback the IF 
passband could be really sharpened - not the most stable situation 
however.  Now if we wanted to go farther into the past maybe the digital 
filter guys could duplicate the regenerative detector.  :-)  Jim w3cp

At 10:43 11/24/2001 -0700, you wrote:

>The current poor conditions for the contest led me to do some
>research into ancient history.  In the 1950's, the ham radio
>operators had some special technology called a Q-MULTIPLIER that
>could pull signals out of the qrm/qrn. It was usually employed in
>the IF stages of their equipment.
>Obviously this would be of great value for modern contesting in
>poor conditions when the Q-rate can be as low as 10 per hour.  A
>Q-multipler of even a small value such as 5 would make this into
>50 per hour.
>It seems reasonable that a modern contesting program could easily
>have this feature added - the programmer already has an IF
>statement - just a little more work should result in a software
>based Q-multiplier.
>tony (ve6yp :-)
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