Ceriatone Forum

i was thinking of putting

Mullard 12AX7 in V1
Tungsol 12AX7 in V2 (i hear good things about the od on these tubes)
JAN-Philips 12AT7WC in V3

i was thinking of keeping the JJ power tubes or changing to the Winged "C" SED 6L6's and using the JJ's as spares

what do you guys think. before i buy them i want to get some ideas from you guys

Thanks,
Jesse

Bad idea !!!

Just keep JJs in all three position or Tung Sols.
If you put 12AT7WC in V3 - amp’s overall volume will go down.

IMO first thing you should do is lose the JJ power tubes.  Keep 'em as spares, sell them on Ebay, give them to you neighbors kid.  Replace with Winged "C" 6L6's.  Bias them up around 32-34ma and enjoy a remarkably creamier, more authentic "Dumble" tone if you will.

Then and only then mess with the preamp tubes.  Why you might ask?  You have to give yourself a good baseline for subsequent changes in the preamp section.  The amp is night and day different with the Winged "C" 6L6's in place.  The difference is so large and unexpected, you might be happy with your current preamp tubes.

The PI preamp slot is also of critical importance I am learning.  Triodes within the PI should be matched closely, then the trimmer (on the board) has to be adjusted to a certain voltage level.  I'm admittedly foggy on this one.  I know the "experts" adjust for a 6 volt difference, but I don't know where to measure with a DMM at this point.  If someone could chime in here with pictures and further rational, we would all be ahead...tonewise.

Jim

I've decided im only going to get the new tubes for my hiwatt and im gonna try Winged "C" EL34's in my overtone and see how i like them, and if i do ill buy another set.

i really dislike JJ tubes and tungsol's are on sale so maybe i'll swap those too