Magnus Danielson wrote: > John Miles wrote: >> Interesting! 500 picoseconds is a lot of drift. Can you try 74AC390s as >> well? > > While that may be interesting, I think we should stop here and think a > little... where would a seemingly stable oscillation/beat frequency > with a period of about 1250 seconds (4 cycles in 5000 seconds) come > from? Also, it is being triangular as noted by Brian. The only thing I > can come up with from the top of my head is power or temperature related. > > The relative quietness of the TADD-2 was nice to get confirmed. I have > not yeat had the time to measure that with mine. > > Cheers, > Magnus > Diurnal temperature variations convolved with A/C cycling?
Alternatively modulation of the 5V Vcc supply (150mV pp) with a 22 minute period would also produce the same effect. Bruce _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
