> All, > > I purchased a 117A at a hamfest years ago and am just now looking into > it. This 117A is a bit different from the ones in the manual and > in pictures up on the web as it incorporates a telechron reduction > motor installed in fthe area in front of the TRF module harness > connector. Had not looked at this unit much as I did not have a > manual which I now have as the power supply board (A9) had a charred > hole blown in it. The TRF module does not insert fully into the > chassis due to the presence of the clockwork module. Interestingly > enough the clockwork looks like HP installed it or someone did a VERY > good job. Does anyone know what this clockwork is intended for?
Scott, I have a 117A like this too. The purpose of the motor and its gears was to slowly move the phase in order to offset the received frequency by some parts in 10^10th. This was done in the 60's and early 70's to convert between UT (universal time) and AT (atomic time). All part of leap second history. /tvb http://www.LeapSecond.com _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
