I am now Annoyed [Re: Old oscilloscope help: ideas sought]

I wrote about an old oscilloscope which was giving me trouble. After some poking and prodding, I managed to get things tweaked back into operation. Then I was hacking on some software, pursuant to driving the 'scope as an X-Y display off a soundcard output, when I became aware of the 'scope making small popping noises. Small popping noises are not a normal operating sound for that 'scope. I used it enough to know _that_. Then, looking over at it, I saw that (at least some of) the tube filaments were dark, and there was nothing on the display. So I turned it off. The popping sounds continued, and I saw a wisp of smoke. I unplugged it and turned it over in search of the part that was upset. 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. It's now been at least ten minutes since I unplugged it, and the transformer is still too hot to rest my hand on for longer than about a quarter-second. And, it is giving off odours which I am also quite certain are not part of normal operation. Tomorrow, I'm going to try turning it on (very briefly, with a current-limiter in series with the primary) to see if it's healthy enough to give me useful voltage measurements. The only winding whose voltage I am confident of is the one that drives the tube heaters. Based solely on wire count I am sure there are at least two others - and based on the application I expect at least one for the final anode voltage and one for power to most of the circuits. Anyone know a good supplier for ten-kg power transformers? :-( /~\ The ASCII der Mouse \ / Ribbon Campaign X Against HTML mouse at rodents.montreal.qc.ca / \ Email! 7D C8 61 52 5D E7 2D 39 4E F1 31 3E E8 B3 27 4B