KT-88's are relatively difficult to manufacture and there are a lot of mediocre to bad ones being sold - people with amps that use them must be very careful. E.A.T. makes high quality KT-88's, but they are expensive (the list price for an octet was $1,400, the last time I looked).
Ghosthouse is correct: current Winged C production comes out of St. Petersburg.
I would contact Andy Bowman at Vintage Tube Services in Michigan - he is an excellent tube vendor.
Ghosthouse is correct: current Winged C production comes out of St. Petersburg.
I would contact Andy Bowman at Vintage Tube Services in Michigan - he is an excellent tube vendor.