Mark Sims wrote: > > I need to build some small tracking transmitters (using a circuit similar > to http://www.jbgizmo.com/page4.html > > This circuit uses a fifth overtone crystal to get an output in the 216 to > 220 MHz range. The circuit is rather finicky about the crystal and > transistor... most don't work.
AFAIK, that is way too high a frequency for 5th overtone. Has something changed? Are you sure there isn't a frequency doubler after the oscillator? Anyway, you can get a complete synthesizer on a chip from Analog Devices that uses very low power (see the ADF4360-8) so you might want to consider that as an alternative. Rick Karlquist N6RK _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
