[R-390] SSB Product Detector

[Stan Gammons]

Hi Ed,

Yes, the one AI2Q did is the one I was thinking of.  But, where can one 
find crystals for it these days?

Using a BFO sounds like another option. Maybe a better one.

Thanks for all the replies.


73

Stan
KM4HQE


On 8/10/19 9:05 AM, djed1 at aol.com wrote:
> You may be referring to one by AI2Q, who did a version of my converter 
> with crystals.  However, I have subsequently modified my converter to 
> crystals, then back to a tunable BFO using a surplus R-390A BFO coil.  
> I've found the tunable BFO to be stable, with the added benefit that I 
> can tailor the BFO to the filter selected (you really want the BFO to 
> be at the edge of the IF passband).
>
> Ed  W2EMN
>
>
> -----Original Message-----
> From: Stan Gammons <sg063015 at gmail.com>
> To: R-390 Forum <r-390 at mailman.qth.net>
> Sent: Sat, Aug 10, 2019 12:34 am
> Subject: [R-390] SSB Product Detector
>
> Hi All,
>
> I've been away from the list for quite awhile. But some time ago someone
> sent me the schematics of a SSB product detector they made. I forget who
> sent me that. It used a MC1496 and 456.3 Khz and 453.6 Khz crystals.
> Since we lost ICM, there isn't very many options for crystals anymore.
> Bomar has a minimum of 10 pieces and QuartSLab wants big $ for low
> frequency crystals. Anyone know of another source for crystals?
>
> Thanks
>
>
> Stan
> KM4HQE
>
> ______________________________________________________________
> R-390 mailing list
> Home: http://mailman.qth.net/mailman/listinfo/r-390
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:R-390 at mailman.qth.net <mailto:R-390 at mailman.qth.net>
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html