4 Jul
2006
4 Jul
'06
6:37 a.m.
der Mouse wrote:
Turns out it is the power transformer (not surprising,
in view of the
dark filaments). It continued making popping noises well over a minute
after I unplugged it, and for a few seconds I was even mentally making
sure I knew where the nearest fire extinguisher was, since it gave the
impression it might actually catch fire.
*Sigh*
ISTR the power supply for our Marconi's paper tape reader doing exactly that;
the Selenium rectifier downstream of the transformer decided to develop a dead
short, resulting in a rather cooked transformer. Luckily, with the machine
being ex nuclear-plant, we could lay our hands on a spare.
I assume the popping noises are the sounds of the transformer windings
distorting with the heat. I expect you've now got a very dead transformer on
your hands :-(
Maybe somewhere like the CHM would be worth contacting to see if they've got
an identical 'scope from which someone can take voltage / current readings and
allow you to build a replacement supply for yours. (Unfortunately all of our
ancient 'scopes are either Tek or Cossor, so I can't do anything - I will
check just to be certain of that, though)
cheers
Jules