I know Paul Ruby from the 18watt Marshall site (
www.18watt.com). He’s a really nice guy, posted loads of stuff there, always very helpful & very knowledgeable,; builds really nice 18watt clones (stunning amp, in case anyone still doesn’t know!) – that site is full of very knowledgeable people who really know about valve amps. Be a real shame if Paul is being troubled by Ruby Tubes or whatever they call themselves

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Ian.