[R-390] R390A SSB Reception

[Stan Gammons]

Hi Perry,

Long time no type.

Yes, low frequency crystals are expensive. QuartSLab wants 100 to 200 
pounds each to make them. Forget that. The BFO and varactor diode ideas 
are good options. It would be way overkill, but I also thought about a 
DDS BFO built using an Arduino. I have all the parts to make one. The 
Treetop adapter is also an option.

Thanks again for all the suggestions.


73

Stan
KM4HQE


On 8/10/19 5:01 PM, Perry Sandeen via R-390 wrote:
> Yo Bubba Dudes,
> Wrote: Where can I get low frequency crystals.
> With the near impossibility of getting reasonable priced low frequency crystals you might want to consider the SSB adapter from Treetop circuits.  It uses the A's BFO but has all the modern circuity for fast attack AGC and such.
> He is a Canadian ham that sells or ebay.  Besides the A, he has ones for the R390/URR, R392 and R388 models.
> He has also developed one specifically for the SP 600.
> Prices are a little over $100.
> Regards,
> Perrier
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