No, I haven't checked any component yet. To open it up I think that I will have to support it in such a way that both end plates can come off and then the single metal plate that covers the top and the two sides slides away.
Ah, waveform; forgot about that!!! I remembering Wrangler warning me it wouldn't suit my Avo163 valve tester as the output is 'distorted' sinewave, and I did once look at it on a scope and it is "irregular". I was just using an Avo8 to look at the output. Mmmm... how do I deal with that
B