At first I did not monitor the Lock Voltage, just the frequency. After it finally locked (~ 2 hours) the case temperature was not that hot. I could leave my hand on it. The frequency did vary about 10 MHz (+/- 200 Hz). The second time I did monitor the Lock Voltage. It was stable (~4.6v) until Lock, when it went to Zero. I was hesitant to return it due to the Postage costs involved. Glad it did Lock.
73, Dick, W1KSZ -----Original Message----- >From: Don Key <[email protected]> >Sent: Jul 25, 2009 1:36 AM >To: Discussion of precise time and frequency measurement <[email protected]> >Subject: Re: [time-nuts] LPRO-101 Status > >I recently bought 2 LPRO-101's. The first worked perfectly, locking up >within 5 minutes. > >The second one would not lock within 15 minutes, so I returned it (to China) >for a replacement. As I didn't have a heatsink, I didn't want to leave it >any longer. Besides, if it doesn't lock within 5 minutes, then I assume it >is faulty. Instead of the frequency sweeping up & down, the Xtal volts >started at around 6V2, then swept down to 0V & stayed there, leaving the >frequency about 180Hz low, as seen on a HP 8591E analyzer. > >Out of interest, did your unit sweep up & down, or was it similar to mine? > >...Jim > > >----- Original Message ----- >From: "Richard W. Solomon" <[email protected]> >To: <[email protected]> >Sent: Friday, July 24, 2009 6:39 PM >Subject: [time-nuts] LPRO-101 Status > > >>I fired it up last night and it took about 2 hours to lock. >> This morning it only took about 20 minutes to lock. >> I guess I need to stir the electrons a bit more ?? >> >> It's sitting there on the counter, with a 1000 sec Gate time >> and it is as accurate as I can measure (BTW, the counter >> reference is a GPSDO - TrueTime). >> >> Looks like a keeper. >> >> 73, Dick, W1KSZ >> >> >> > > >_______________________________________________ >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.
