Eeyore said:
And what makes you so sure you haven't just experienced a statistical
anomaly ?
I mean, you'd have to believe in black magic or voodoo / whatever
otherwise.
There's certainly no possible scientific explanation.
What amazes me as much as anything is that you'd keep a record of this !
Graham
Well, all right then. Just *what* qualifies *you* to tell *me* that I'm
wrong ? I have probably changed more bridge rectifiers in the 35 years that
I've been repairing stuff for a living, than you have ever even seen. Do you
think that you are teaching me something by coming out with 'big' words like
"statistical" and "anomaly" ? And what qualifies *you* to be so certain that
there is "no possible scientific explanation" ? Explain why it's always the
neutral terminal screw that comes loose in a plugtop, for instance. Same
current flows in both pins.
I don't "keep a record" of this. If you knew the first thing about the
practical world of service, instead of just pretending that you do all the
time, you would know that this is just the sort of thing that sticks in a
proper service engineer's head. As it happens, the reason that I brought it
up was that a colleague of mine, just last week, made the comment to me, and
I agreed with him. Then, this morning, the very first job on the bench, had
a faulty bridge in it, and what d'ya know - it's one of the diodes in the
negative arm again that's short circuit.
Whilst the magnitude of the current in all diodes is theoretically the
same - and even that might not be quite true if there is any residual DC
magnetism in the core of the transformer - the current which flows in the
diodes in the negative arm, flows in the opposite direction to that in the
positive arm. Also, the arse end of the diodes in the negative arm,
typically go to the chassis mass, which may well be tied to power ground
(mains earth) so I think that there might very well be a "possible
scientific explanation".
Anyone with a better understanding of the real world than Graham care to
comment ?
Arfa