Hp kinda stole the idea from the old General Radio syncro clock (I have two of these). In the longago time, we had a homemade version that generated 1 sec ticks to drive clocks in our research tower lab at New Mexico Tech. It ran for a number of years. Don Latham Chuck Harris > Sing is an understatement! > > The motor is essentially a stepper motor that is being run with > a 2 phase excitation. It is driven with 1000Hz, and whines pretty > good... Fortunately it is in a thick aluminum case that is both air > and water tight. > > It is considerably quieter if you make sure the ball bearings > are in good shape. > > -Chuck Harris > > J. Forster wrote: >> HP made one with a sync motor running a Veeder Root counter. Something >> like a 115A. Runs off 100 KHz from their crystal oscillator. Neat unit. >> It does "sing" a bit. >> >> -John > > _______________________________________________ > 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. >
-- Dr. Don Latham AJ7LL Six Mile Systems LLP 17850 Six Mile Road POB 134 Huson, MT, 59846 VOX 406-626-4304 www.lightningforensics.com www.sixmilesystems.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.
