It's time to replace the tubes of my cobra.
What brand of tubes works good in the cobra power section?
ther's the stock el34 electro harmonics in my cobra at the moment.....
Depends on your budget, Ruby's have a great reputation (according to Dougs Tubes and The Tube Store) and are cheap, Winged C's are the fucking legend but are pricier. I really wouldn't consider anything else, except maybe Tung Sol