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RE: ok, what is happening here????

Vinnie, this is the issue I described earlier about some of the lighting transformers I purchased more recently. They should output 24V pk-pk, but they're running about 30-35V instead. The only way to reduce this is with resistors. Even at 24V (12V rms), I had to do that for my 10V filaments.

My suggestion is to first load it more heavily. Wire two or preferably three of your 813 filaments in series and connect them to the output. Then examine it again with your scope. With careful trimming of the Trigger Level control, you should be able to get a fairly clean display.

Report back regarding amplitude and waveshape. :)



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