[time-nuts] Vintage Frequency Measurement
robert8rpi at yahoo.co.uk
Sun Feb 12 12:16:18 EST 2017
In a word,Wavemeters. Classic US onwas the BC221 with built in 100kHz crystal calibrator
British was the "Class D"http://www.royalsignals.org.uk/photos/classDno1.htm
For UHF and Microwave it was Lecher lines or cavity wavemeters.
From: Scott Stobbe <scott.j.stobbe at gmail.com>
To: Discussion of precise time and frequency measurement <time-nuts at febo.com>
Sent: Sunday, 12 February 2017, 6:08
Subject: [time-nuts] Vintage Frequency Measurement
I was inspired recently coming across a Lampkin 105 frequency meter, as to
how frequency measurement was done before counters.
Certainly zero-beating a dial calibrated oscillator, would be one approach.
Is there a standout methodology or instrument predating counters?
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