Mark IV 12at7 reverb tube

[Sp3ktral]

the tube labeled 12at7 that I believe is the reverb driver....

I don't have the reverb hooked up. don't plan on hooking it up again it my current rig.

can I put a JJ 12au7 in there? will it effect the sound of any of my channels?

 

[zodiac272]

if you have one try it, but check this out

http://www.grailtone.com/forum/viewtopic.php?f=4&t=4538


scott

 

[Sp3ktral]

went for it....no change in sound.

again, i keep the reverb knob on 0 and I don't even have the unit connected.