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, [email protected] 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: [email protected] [mailto:[email protected]] 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 <[email protected]> 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 -- [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.
