Sorry, but I keep all my old pre amp tubes... between my old Mullards and the large vibrating egg I have near the bed, my wife stays always happy :)...
Besides, I prefer the TungSol...
Read through it. How easy! Thanks for your help. Now I can eBay that barely tolerable Holy Grail Pedal that has been a weak sub for the tank in my Mark IV... THANKS!
My Mark IV does not have a switchable reverb. Is there a way to mod this in order to be able to turn the reverb On/Off?
Who does quality Mesa mods in Northern CA.?