Beaten by VT100 PSU.
ard at p850ug1.demon.co.uk
Wed Aug 17 13:07:04 CDT 2016
> When I used a variable load on the 12V both the amplitude and the period
> varied. More load less amplitude.
More load _reduces_ the ripple? That's very unusual.
> Added the AVO option. Then I have perfect picture. So the extra loading
> makes a difference.
But that mostly loads the +5V line.
I am wondering what on earth can generate a waveform of around 390Hz in that
Have you checked that the +12V Startup supply is nice and smooth. I doubt that's
the problem, but it is worth eliminating it.
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