Maybe not for the Deluxe Reverb
This is a follow up to my post 9 months ago. Everything stated in the first review as well as what is written in TheTubeStore review is dead on correct. In summary, they gave my Deluxe Reverb a more refined tone. Same sonic signature, but a bit smoother on the top end and better attack. Unfortunately, they died after 8 months. I purchased another set and 1 died after a month. I believe the plate voltage might be a bit too high. TheTubeStore was excellent with their help. No issues at all. I paid the difference and purchased a set of TAD tube, hoping they might handle the plate voltage better. Worth trying in your Deluxe? Absolutely. I liked them so much, I might just accept the fact that I replace the power tubes each year.