I'm just popping off an e-mail to Cary to get the lowdown but thought someone here may already know the answer to this :
I have a pair of cary 572SE Sig monoblocks and the Svetlana 572-3 valves are now getting in short supply and I have heard that Cary offer a modification to use alternate valves. I suspect that they will be 300Bs but does anyone know for sure ?
Andrew