I only use metal base Philips / Mullard EL34. The very best is the ''high heel'' version for the french market, marked ''Importé d'Hollande'', very, very (if not extremely?) rare. This is what you must look for, not the ''brown base'' crap. Or, try to find real GEC KT77, also very good, but, alas, rare.
Old EL34
Does anyone has listen to the performance of Mullar EL34 with borwn base. It cost almost $500 for four. People say that the number of good conditions EL34 is getting less and less. Some very old EL34 even worth more tha $1,500. Can someone give me your opinion regarding such old EL34 compared with other brand name which are also quite old. Thanks