Re: Valve preamp.
"Bang on" is not really the right term, I'm familiar with valve circuits not having a close tolerance but the Vgk measurements were well off putting the ECC83 near cutoff , couldn't get the first stage diff amp to balance too.
Am using valves David for some of the reasons you mentioned (certainly not because I think they're magic) but mainly cos I've got the bits but mostly because I've had the mains tfmr's for a while knocking about crying out to be used. I've not written off the idea of using opamp or fet based design for the phono stage, just experimenting at present.
Andy.
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