[time-nuts] Vintage Frequency Measurement

Bob Albert 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.

Bob
 

    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!

Dan


_______________________________________________
time-nuts mailing list -- time-nuts at febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.


   


More information about the time-nuts mailing list