12 Sep
2014
12 Sep
'14
9:58 a.m.
On Sep 11, 2014, at 7:06 PM, Tony Duell <ard at p850ug1.demon.co.uk> wrote:
That reminds me of an article, perhaps in the late 1960s, in QST by John Troster, w6ISQ,
author of all manner of joke articles. The title was something along the lines of
?Murphy?s laws of electronics?.
One of them: ?A transistor, protected by a fast acting fuse, will protect the fuse by
blowing first?.
Another one: ?A dropped tool will land where it does the most expensive damage ? this is
know as the Law of Selective Gravitation?. (That came with a cartoon showing a hammer
nudged off a shelf, on a direct path to an expensive vacuum tube in an open chassis on the
bench.)
paul
Well, they do say that the device is there to protect the fuse...
Actually my experience relating to thsoe expensive FF fuses used in
SMPSus ios that hte chopper transsitor will fial short-circuit, thus
ensurign the fuse is destroyed too?