[ARC5] R-23 Receiver

[Bob Groh]

The Q5'er was my first 'real' receiver - the narrow bandwidth (compare to
my S-40B) and the 'huge' tuning range was just super nice. Long gone now
(don't even remember that I did with it!) but I have two BC-453's on the
shelf for building a 'new' Q5'er someday.

73
Bob Groh, WA2CKY

On Mon, Aug 7, 2023 at 10:23 AM Robert Nickels <ranickels at gmail.com> wrote:

> On 8/7/2023 9:21 AM, Michael Kana wrote:
> > My R23 will be used more as a tuneable IF RX/Q5'er
>
> Since it's already been hammified, I hope no one will be upset by
> mentioning a couple of the best "hacks" for this receiver.
>
> As Mike says, the most common use was as a Q5-er, tapping onto the IF
> output and tuning it to 455 (or whatever the IF is) for an added stage
> of conversion.   But the real gain came from the nice narrow bandpass
> filters in the R23/BC-453.
>
> One of ham radio's most prolific writers, Don Stoner, saw the potential
> to do more, and wrote two articles about using the LF command set as the
> basis of a complete receiver.
>
> #1 - The Novice Q5er (80 and 40 meters):   scroll down to the link on
> Ken's page here: http://w7ekb.com/glowbugs/rx/receivers.htm
>
> #2 -  The 1959 SSB Q5er (80-10 meters):   This article was published in
> CQ magazine and isn't readily available.  It uses a very clever
> single-crystal circuit to generate the required LO frequencies to cover
> the SSB portion of five ham bands with a 3 tube converter and a 2 tube
> product detector.  I've always wanted to build one, but have played
> around with simple converters and with the85 kHz IF set to it's
> narrowest position the BC-453 is indeed capable of good SSB selectivity
> (about 3kHz).
>
> Some long-forgotten ham builder really took it to the next level with
> the homebrew receiver that I have - building from scratch using the
> BC-453 IF transformers and circuitry - described here:
> https://tinyurl.com/2ju6apcm
>
> These are fun radios to experiment with and which can still be used to
> provide good performance on the ham bands.
>
> 73, Bob W9RAN
>
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