Re: Pye CT205 - a partial success story!
I would imagine there's two seperate faults ie: ringing on the CDA, proven by swapping the panel and hanover bars on the decoder. I would deal with one fault at a time to avoid confusion. You certainly raised an interesting point about incompatability between the Pye and Dynatron panels. usually lack of black level clamp (with flyback lines) is due to the BC108 transistor close to the PL802 on the CDA panel, but if all is ok on the Dynatron it seems there are extras on this panel that make it incompatible with the Pye one!
Cheers,
Brian
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