Hi
> On May 25, 2017, at 4:12 AM, Matthias Jelen <[email protected]> wrote: > > Hi Angus, > > thanks for the hint. I read through this fairly long thread - the baseline > seems to be: Replace the caps. > > Best regards, > > Matthias That’s what worked for mine ….. (at least most of them). In my case they arrived dead. Bob > > Am 23.05.2017 um 21:44 schrieb Angus: >> Hi, >> >> If you've not already looked, it would be worth checking on the >> EEVblog since there were some discussions there on faults in these >> units - particularly the capacitor and lamp voltage issues. >> One of the temperature controllers could be a little unstable too. >> >> Angus. >> >> >> On Tue, 23 May 2017 09:40:26 +0200, you wrote: >> >>> Hello Time-Nuts, >>> >>> i´ve been playing with some Rbs recently. >>> >>> I compared two LPFRS-01 to a PRS-10. One seems to behave quite well >>> (compared to the specs given here: >>> http://www.spectratime.com/uploads/documents/isource/iSource_LPFRS%20Spec.pdf) >>> - short term stability specs are met), the other one shows quite some >>> phase ripple (appx. 1 ns RMS with a frequency around 0.007 Hz) which spoils >>> ADEV in the 60 - 200s range, very similiar to the typical GPSDO bump. Long >>> term stabilty is OK. >>> >>> Unfortunatly I didn´t find any schematics on the web. Has anyone >>> encountered a similiar problem with this unit? Any idea were this might >>> come from? My first guess would be a problem in the control loop locking >>> the VCXO to the Rb, but I have no clue which time constants are used in the >>> PLL. >>> >>> Any hints are appreciated. >>> >>> Regards, >>> >>> Matthias >>> >>> _______________________________________________ >>> 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. _______________________________________________ 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.
