Re: Bush DAC 90A Conversion
Quick test put a 500 K fixed resistor between the lead you have lifted off the volume control and the common end of the volume control (cathode of V2 and V3) this will return a load onto the detector
See if that improves it.
Cheers
Mike T
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Invisible airwaves crackle with life or at least they used to 
Mike T BVWS member.
www.cossor.co.uk
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