My RMS Engineering receiver is quite old and in fact was designed to only receive 18 or 20 KHz signals. All the transistors are 2N404 Ge. Way back someone was selling a conversion kit to make this unit operate on 60KHz for WWVB. The way it works is the 100KHz from an external standard is fed to an injection-locked divide by 5 divider to get 20 KHz then fed to the modification which is an X3 board to give 60 KHz to directly compare with the received and amplified 60 KHz from WWVB, then sending the difference as a d.c. voltage to a strip chart recorder. The external standard is ideally adjusted to get a zero slope on the strip chart recorder. Generally the only way to know if the signal is being received are the 5-minute phase shifts 10 minutes after each hour.
To see the difference you can with a T-bolt and Lady Heather in a few minutes might take 24 hours or so with the WWVB unit. Making a series of adjustments to zero a standard might take days. -Arthur _______________________________________________ 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.