>From what I've seen, peaking the lamp voltage with the trimmer capacitor on an LPro does not improve the stability. It may even get a bit worse. This was the case on a couple of different units; I didn't investigate further.
-- john, KE5FX www.miles.io > -----Original Message----- > From: [email protected] [mailto:time-nuts- > [email protected]] On Behalf Of Bob Camp > Sent: Tuesday, August 28, 2012 9:35 AM > To: [email protected]; 'Discussion of precise time and frequency > measurement' > Subject: Re: [time-nuts] Datum Lamp Voltage > > Hi > > 6.0 to 7.0 volts is a *very* typical lamp voltage on an early LPRO. > > Later production runs did something that bumped the number up to around > 9 > volts. I've never seen any real data showing that the 9 volt parts are > actually any better (or worse) than the 6.5 volt parts. The change could > have just been a resistor value on a buffer amp... > > Bob > > -----Original Message----- > From: [email protected] [mailto:time-nuts- > [email protected]] On > Behalf Of J. Forster > Sent: Monday, August 27, 2012 9:34 PM > To: Discussion of precise time and frequency measurement > Subject: [time-nuts] Datum Lamp Voltage > > Hi, > > I'm just powering a new to me Datum Rb, Type 102500-001, LPRO for the > first time. The unit locks up quickly, and after about an hour, I checked > the Lamp voltage. > > My unit is sitting at 6.9 VDC. > > >From the manual on Didier's site, below 3.0 or over 14 indicate failure. > Does anyone know whether the measured voltage should be for a new unit? > I'm trying to guestimat the remaining life. > > Thanks, > > -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. > > > > _______________________________________________ > 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. _______________________________________________ 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.
