Terrific in Fender 68 Custom Deluxe Reverb
This is the third set of 12AX7 in V1, V2 of my amp. The stock GT branded JJs were decent when driven, but a bit dull when clean. Up next were Tung Sols, which were beautiful clean and just on the verge of breakup, but grainy and harsh when really driven. The Svetlana hits the best of those 2, and then some. The description is bang on - clear and open, not too bright. They have a beautiful warmth when driven, and can be driven both smooth and with punch.