Hi Maybe I’ve been wrong for the last many decades …
To me a wave meter is a tuned circuit device that tells you the frequency by a resonance peak. They are a very common old school item for microwave frequency measurement in a teaching setting. https://www.britannica.com/technology/wavemeter Bob > On Feb 12, 2017, at 12:16 PM, Robert Atkinson via time-nuts > <time-nuts@febo.com> wrote: > > In a word,Wavemeters. Classic US onwas the BC221 with built in 100kHz crystal > calibrator > http://radionerds.com/index.php/BC-221 > British was the "Class D"http://www.royalsignals.org.uk/photos/classDno1.htm > > For UHF and Microwave it was Lecher lines or cavity wavemeters. > Robert G8RPI. > > > From: Scott Stobbe <scott.j.sto...@gmail.com> > To: Discussion of precise time and frequency measurement <time-nuts@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@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > > > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.