Hi Andy,
I am very interested in your propassion. Funnily enough I have been on the look out for a T.V.C. for a while to replace my souped up Q.E.D. passive, but affordable second hand examples seem rarer than hens' teeth. Do you think your passive would be a significant improvement over the QED. In case you don't know it, it has an Alps Blue pot. Mine has been re wired with silver wire and has posh RCA jacks fitted.
Thanks,
Ben
PS. does your passive have two volume controls?