Hi ...or my lack of experience. I think I first saw problems like these in 1975. Somehow they keep showing up :)....
Bob On Feb 27, 2012, at 5:44 AM, ewkeh...@aol.com wrote: > Roberto > It is called tens of years of experience > Bert Kehren > > > In a message dated 2/27/2012 5:16:28 A.M. Eastern Standard Time, > rbarri...@msn.com writes: > > Hi Bob, > > I wonder what the other oscillators that others are receiving look like in > the SA. Replacing all the capacitors would take a serious effort, not sure > if it would be justified. > > Can I ask how can you know all that by looking at the spectrum plot? > > Thank you, > Roberto EB4EQA > > -----Original Message----- > From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On > Behalf Of Bob Camp > Sent: sábado, 25 de febrero de 2012 23:55 > To: Discussion of precise time and frequency measurement > Subject: Re: [time-nuts] Morion MV89A Repair > > Hi > > The spectrum you show in the middle is the correct one. It shows the 10 MHz > output and the sub-harmonics related to the 5 MHz crystal oscillator. The > other two are a bit broken. One appears to have a stage oscillating. The > other is more interesting. It has a stage oscillating that is injection > locked to the 5 MHz crystal oscillator. I suspect more than one capacitor > went bad in these OCXO's. Somebody may have sold Morion a bad reel of > bypass > caps. > > Bob > > > > On Feb 25, 2012, at 4:01 PM, Roberto Barrios <rbarri...@msn.com> wrote: > >> Hi all, >> >> >> >> I spent this evening repairing a MV89A that had a weak output, output >> cap was bad: >> >> >> >> http://www.rbarrios.com/projects/MV89A >> >> >> >> I also found while comparing with other two MV89A's that they show >> different output spectra, as can be seen. Test conditions were >> identical but one appears much cleaner than the others. What are the > reasons for this? >> >> >> >> Regards, >> >> Roberto EB4EQA >> >> _______________________________________________ >> time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to >> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >> and follow the instructions there. > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > > > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. > _______________________________________________ > time-nuts mailing list -- time-nuts@febo.com > To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.