"Michael A. Terrell" ) writes:
Scott Dorsey wrote:

In article .com,
wrote:
Hello, i am looking for a schematic for a 100kHz crystal calibrator,
nothing fancy.

The ARRL Hints and Kinks book has a nice one. Takes a 100 KHz crystal
and uses a single low-grade MOSFET.
--scott
--
"C'est un Nagra. C'est suisse, et tres, tres precis."


You can use a 1 Mhz crystal and a divide by ten. A lot easier to
find, and a lot less expensive.

Plus, it gives you markers every 1MHz, which can be useful.

Yes, after logic ICs became available in the late sixties, the trend
was towards a crystal higher than 100KHz. It doesn't even have to
be 1MHz, 10 or 4 or any exact multiple of 1MHz will do, since it
takes really no more circuitry or cost to divide by 4 or 10, or
whatever first. And once the divider chain is in place, one
can have other output frequencies, like 50KHz or 25KHz for those
bands that don't end on 100KHz multiple.

Michael VE2BVW