I've been having problems with a farty sound when driving the input hard with pedals, so in an attempt to get to the bottom of it I thought, why not, lets put the set of EL34's in that I had from Nik when i bought it. Needed quite a change on the bias pot to bring them up to about 28mV.

First think i noticed was they are bright right from the off, the 6L6's needed a burn in time to get them chimey. Different sound more mid I think, maybe a little less bass, but without A/B ing one after the other its difficult to tell (there was a gap of about two hours from the 6L6's to getting around to putting the EL34's in). Will give it a whirl at rehearsal tomorrow.

Finally found the farty problem I think, V1 had the original JJ in it (though it was taken out for a while to try an AT7, but then i put it back when that went nasty on me). Just put an EH ECC83STR in V1 and it now seems OK and the OD seems smoother aswell somehow.

I would have thought a 12ax7 would last longer than this, its not as though i've been giggin with it a lot, and only averaging one rehearsal a fortnight or so. Still put it down to experience. Farty OD sounds, try V1 first!!