); 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 -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
