Frequency dividers can be pretty low noise, if you choose the right class of logic. I remember that at one time in the distant past, LSTTL was considered king. Unfortunately I've been out of touch with frequency dividers long enough to be ignorant of what works well today.
i'd suggest trying something with either HC-series or AC-series CMOS, chances are fair that you'd be happy. Write me off list and I'll tell you which well-known distributor still has an excellent selection of HC and AC parts in stock. Dana On Fri, Sep 14, 2018 at 11:14 AM, <lstosk...@cox.net> wrote: > Off topic for this list, but you guys are experts in oscillator noise! > > Playing with some mechanical filters. Need USB and LSB crystals for the > BFO. No one seems to make crystals anymore, especially in the 253 KHz > range! > > Looking at the DigiKey Cardinal programmable oscillators. Cheap and > available: CPPC1LZ A5B6 > > Anyone have an idea how noisy these would be after a division by 4 to get > them in range? > > Thanks, > > N0UU > _______________________________________________ > time-nuts mailing list -- time-nuts@lists.febo.com > To unsubscribe, go to http://lists.febo.com/mailman/ > listinfo/time-nuts_lists.febo.com > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.