Hi I would dump the batteries. If you need backup, run a UPS or some sort of external DC setup. Batteries inside something like the 105 only seem to lead to messy problems down the road.
Bob > On Oct 10, 2019, at 2:10 PM, Roy Thistle <roy.this...@mail.utoronto.ca> wrote: > > Hi All: > A 105B (quartz oscillator) is blowing the 1A fuse, after it is on about 1 > hour. > The fuse appears to have just melted (not a black mark as the result of a > flash, in the case of a high current short.)… just looks like the fuse wire > (inside the glass capsule) melted into some little blobs, for about 1/4 the > fuse length, near the middle. It wasn't a fast-blo or slow-blo fuse... just > the normal kind. > I think the unit is drawing just a little too much current, as the result of > the batteries needing charging (I had the fast charge option on when the fuse > blew.) And so, the fuse heated up, and finally melted. Not sure why the > batteries were not charging normally... but 20.1 volts is what I measured > across the pack, initially, and 23.4 V after about 45 min of charging. > I am charging the batters, from a power cube, at 510 ma, and dropping (cube > gives 25V, 500mA max)… the batteries are 20 C size NiCads, wired in series... > that of course is a retrofit. > I don't want to put another fuse in, and blow that too, without some > reasonable explanation of why the first one failed! > Please, any comments, or hints/suggestions... much appreciated. > _______________________________________________ > time-nuts mailing list -- time-nuts@lists.febo.com > To unsubscribe, go to > http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com > and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@lists.febo.com To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
