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

Possibly, though I find Chuck Guzis's guess that it's boiling varnish somewhat more plausible. Just a thought - does anyone know what happens to a steel-core transformer if its core goes above its Curie temperature? While I don't think it got anywhere near the Curie temperature of plain iron (about 1000?K - and paper catches fire at something like 500?K), I don't know the Curie temperature of transformer-core metal.... That's what I fear too. :( I haven't done anything with it, yet; I've been at work all day. When I get back home I'm going to trace out a schematic of everything the transformer feeds, mostly meaning the power supply, to tell whether the suggestion of pulling all tubes really will remove all load from the transformer. (I expect it to, given the apparent absence of semiconductor diodes, but am not about to count on it without checking.) I may do that, but first I'm going to see if I can get voltage measurements off mine my removing all load. If necessary I'll cut wires; even if this transformer works in isolation, I am not about to try to run the 'scope off it for more than moments, so I definitely will be cutting wires to remove it at some point. The thought is much appreciated! /~\ 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