Hej Magnus, Did you consider switching the 5370 and the 5372 oscillators? Putting the blame either with the osc or the hosting 5370.
-- Björn On Mon, July 23, 2007 5:10, Magnus Danielson said: > ); SAEximRunCond expanded to false > Errors-To: [EMAIL PROTECTED] > > From: "Mike Feher" <[EMAIL PROTECTED]> > Subject: Re: [time-nuts] HP 5370B low frequency modulation > Date: Sun, 22 Jul 2007 22:58:00 -0400 > Message-ID: <[EMAIL PROTECTED]> > > Mike, > >> Highly unlikely, but, possible, especially if it was in a corrosive >> atmosphere. Of course then I would expect to see evidence of corrosion >> on >> other components. When we do not know the answer we can come up with so >> many >> possibilities and not have one of them correct. I have run across a lot >> of >> those defective fuses over the years as HP has been using them forever. >> There was no real evidence as to why they opened, and that is why before >> I >> guessed at just plain ageing and the wax eventually getting soft. I just >> checked the current flow within the oscillator where the fuse used to be >> plugged in, which was at least nice of them, and always found it to be >> normal. I just took a piece of buss wire and plugged it into the same >> two >> pins were the fuse used to be and never had a problem again. The >> situation >> Magnus describes of course is very unusual, and, in reality would only >> be >> found by a time nut as it is so miniscule. There is also some >> periodicity to >> it, which does suggest some control loop problem, but, I would hate to >> even >> take a guess. - Mike > > May I also point out that there may be as low as short low period per 1000 > s or > about 3-8 (rought estimate). > > I am considering all kinds of possible reasons for it. The group certainly > has > more experience shared among them than I have on these, so I concentrate > on > observations. > > I wonder if it may be some form of initial shock burnout that I am > witnessing. > I have no idea how they are suppposed to look. It is not like you want to > toss > your 10811s to the floor just to see how they behave as a result, now is > there? > If I where making them I would, but with a thad more of science attached > to it. > > Cheers, > Magnus > > _______________________________________________ > 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.