[ARC5] Q-5er

[D C *Mac* Macdonald]

The Q-Muiltiplier introduced regeneration
into the last I.F. amplifier which greatly
improved selectivity. If the regeneration
were increased far enough, the I.F. stage
would go into oscillation which could give
the means to copy ICW on a receiver without
a BFO. Hammarlund used that shortcut on the
HQ-100 receiver.
 
I did it to an old RCA Model 10K 1930s multi
band console radio to use as a ham receiver.
Later I added a Morrow 5BR-1 converter to the
RCA to get much better higher band sensitivity.
That was my station receiver for several years.

* * * * * * * * * * *
* 73 - Mac, K2GKK/5 *
* (Since 30 Nov 53) *
* Oklahoma City, OK *
* USAF, Ret (61-81) *
* * * * * * * * * * *
 


----------------------------------------
> Date: Sun, 6 Mar 2011 12:25:36 -0800
> From: jfor at quik.com
> To: wrcromwell at gmail.com
> CC: arc5 at mailman.qth.net
> Subject: Re: [ARC5] Q-5er
>
> Thanks Mac.
>
> -----
>
> A Q multiplier was a posttive FB scheme to narrow IF bandwiths, hence
> selectivity of the radio.
>
> Using a second conversion, as by hooking up a 0.190 to 0.550 MHz SARC=-5,
> does functionally the same thing.
>
> Hence my question.
>
> Best,
>
> -John
>
> ================
>
>
> > Hi Ken,
> >
> > I vaguely remember something about a signal report of Q5 or some such
> > thing that meant a good copy. That might not be quite right or
> > completely wrong. But the Q5ers I have and others I know about don't
> > have a Q multiplier involved so that might not be right, too. Maybe
> > earlier "Q5ers" did use a Q multiplier - before there were R-23 radios.
> >
> > Any help here?
> >
> > 73,
> >
> > Bill KU8H
>
>
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