[Milsurplus] BC-348 w. 2nd conversion to 85kcs in BC-453

[John Franke]

It was "A New, Simplified Q5-er" and was in the July 1953 issue of CQ, pages 
25-27.

John  WA4WDL

----- Original Message ----- 
From: "Jim Haynes" <jhhaynes at earthlink.net>
To: "Marty Reynolds" <cosmoline at aa4rm.ba-watch.org>
Cc: "David Stinson" <arc5 at ix.netcom.com>; <cosmoline at netboobie.org>; 
<milsurplus at mailman.qth.net>
Sent: Wednesday, December 17, 2008 11:36 AM
Subject: Re: [Milsurplus] BC-348 w. 2nd conversion to 85kcs in BC-453


> The late W6NRM published an article in CQ - and I can't lay my hand on
> it right at the moment, but was in the mid 1950s - where he converted the
> 915 KHz down to 85, went through the transformers from the Command Set,
> and then converted back to 915 and sent it through the regular detector
> and audio.  He had an external AC power supply, so mounted this stuff in
> the dynamotor space.
>
> Based on his ideas I did something similar, and brought the conversion
> oscillator frequency control out to the front panel so it allowed
> passband tuning.  And I used a bandpass filter I had found in some
> surplus store rather than the 85 KHz IF transformers for selectivity.
>
> Jim W6JVE
>
>
>
> jhhaynes at earthlink dot net
>
>
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