Upgrade for 70s vintage Svetlana el34

I like Svetlana's el34, atleast those from the 70s, but can anyone suggest a tube that would be a noticeable improvement? Also,if possible, please tell me in what areas the tube you suggest might be an improvement. Thanks very much.

Showing 1 response by thorman

Why not try the Cryo'd Svetlana el34 from Tube Depot? $ 150 a quad . cheaper than a nos quad and may sound as good and last longer ....I haven't yet tried it but will eventually....( Thor monos )