KE9EX wrote:
I read here or somewhere about how to translate the numbers stamped on
a FT-243 Crystal
to be able to tell the Crystal's Frequency. I have some with these
numbers stamped on them,
and want to be certain of the frequency, since the ink with the exact
Frequency has long since faded. TNX ex 73, Mike

I don't know offhand, BUT I know one of the Hints and Kinks books has
a Pierce crystal oscillator circuit intended as a crystal tester. One
FET, a couple resistors, and you take the output to a counter. Now you
know what any crystal is, even one that some ham has polished down to a higher
frequency. I have seen quite a few hamfest crystals that have been
modified since they were surplussed.
--scott
--
"C'est un Nagra. C'est suisse, et tres, tres precis."