[time-nuts] Vintage Frequency Measurement

Bob Camp kb8tq at n1k.org
Sun Feb 12 19:29:57 EST 2017


That’s not the *accuracy* of the crystal mind you. That’s how close you do the zero 
beat to something else that is more accurate. The crystal is out in the open and it
drifts quite a bit as the unit warms up or changes temperature due to being moved 


> On Feb 12, 2017, at 6:11 PM, Dan Rae <danrae at verizon.net> wrote:
> To put BC-221 things in perspective, the 1 Mc/s reference crystal was adjusted, according to the manual, to within 5 c/s...
> Things have come a ways since!
> Dan
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