[time-nuts] Vintage Frequency Measurement
bob91343 at yahoo.com
Sun Feb 12 19:58:09 EST 2017
Well 5 cycles per second is more than accurate enough. That translates to a 150 Hz error at 30 MHz, definitely negligible for the uses of all these gear. There was no official Time Nuts group at the time, although many of us had the spirit. Yet the capability of the BC-221 far exceeded its specification if you could receive WWV.
I noted immediately that zero beat of WWV at 5 MHz was not as precise as at 15 MHz. In those days there was even a 30 MHz WWV but it got shut down a long time ago. And there were CHU and JJY.
On Sunday, February 12, 2017 4:02 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!
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