[Hallicrafters] Fw: I Need SSB Mod for Hallicrafters S-40A

[Ian Webb]

I pointed out to the poster in a private e-mail, unless you're doing
this for the "fun of it" you're not going to create a receiver that is
much fun to use on SSB.  I know from experience when the S-40B was still
a popular receiver during the transition from AM to SSB that other than
40 meters and lower in frequency the drift is intolerable for
comfortable SSB reception.

I personally wouldn't bother doing anything but receiving SSB with the
RF way down and the BFO on and AVC off.  The tuning rate and drift
combine to make it a full time job to try to follow a SSB signal.  With
CW the problem is the same but there at least you don't get a garbled
voice just a CW note that is changing pitch constantly.

Ian, K6SDE


Glen Zook wrote:

> There were some modifications that would work with the
> S-40A in the first couple of editions of the ARRL SSB
> manual.
>
> Frankly, it is probably easier to "tap off" of the 455
> KHz i.f. and build a separate circuit that includes a
> good filter.  The S-40A is "way" to wide for decent
> SSB operation.
>
> Of course, you can use the old turn off the AVC, run
> the audio gain wide open, and use the r.f. gain as the
> volume control.  That does work fairly well.
>
> Glen, K9STH
>
> --- Andrisin <andrisin at verizon.net> wrote:
>
> I am looking for a SSB mod for the Hallicrafters
> S-40A,eg product detector mod. Can anyone provide a
> copy of this mod or refer me to a website that has
> such a mod?
>
> =====
> Glen, K9STH
>
> Web sites
>
> http://home.attbi.com/~k9sth
> http://home.attbi.com/~zcomco
>
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