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The thing that gets me... the nine preamp tubes I've rolled (I didn't touch the PI), they can't all be bad. The fact that I heard ZERO difference, regardless what I did, which tube or where, leads me to believe it's internal. That said, I still want one LOL!!! There's too much good in it. The...

So... the tubes did arrive today LOL! The TAD is a little taller. No issues getting them in. Got them in, let them warm up... absolutely ZERO difference LOL! Still thin, still harsh (like a guitar with an OD direct), still hissy and poppy. Should I even bother actually getting new preamp tubes?

:D :D :D Ok, no 25 LOL!!! Usually I'd be all about 50 watters, but both being the same price new makes it a challenge. That said, a BAD 50 would be a cool sibling to the JP2C.

Ok... now you guys have me thinking I need a BAD 50, too, just because LOL!!! Tough choice, since the 50 and the 100 are the same price new now. I assume it's the typical difference between 50's and 100's... ? 100's maybe more punchy, 50 maybe smoother... ? The only thing that tuned me out of...

The really funny thing would be if my replacement preamp tubes turned out to be bad LOL! We'll definitely know more Tuesday. Do the power amp sections of the various Mesas behave similarly in regards to their relationships with the preamps?

I may have to get one of those, too! Same cost, but is there a bit tonal difference between the 50 and 100 models? I know that's off-topic. The power tubes will be here Tuesday. Crazy thing would be if they actually made a difference after my experiment made it seem like they weren't the...

Thanks!!! Those are my two favorites. I need to take pics of the others. The GEQ must come after the effects loop, since it did affect (heh... ) my sound. I was able to tweak it in my experiment. I do need to test the preamp section through another amp. I was a little discouraged with the OCD...

Experiment #1 complete... ran my germanium OCD directly into the effects return and plugged into the pedal. Other than it sounded muffled, there were no pops, hisses or groans. Did I prove anything? No clue LOL!!!

@bandit2013 Man!!!! You've really experimented with stuff like I have!!! Lots of different things and in the end they all sound like me LOL!!! The funny thing is pickups all seem to be two flavors to me and the rest is tweaking: ceramic vs AlNiCo. I get more open sound from AlNiCo, more...

Got it!!! I've heard some hot & cold stuff on Psvane's reliability, but not enough bad to ward me away. Hopefully we'll see some progress once the TAD 6L6GCM STR's arrive. My Shuguang preamp tubes we bought like ten years ago LOL!!! That was where I got the one to try in V1, for example. They...

What it's worth, I got the ok to get a quartet of TAD 6L6GCM STR's to try out. If they work... purchase price removed from the amp. If not, he'll still reimburse me for them.

@bandit2013 Man... I appreciate all of it. Just because I have experience with amps (too much LOL!), doesn't mean I have a lot of experience with these amps or this flavor of amps. The Mark flavor, in particular, is different. Not just from other amps in the Mesa lineup, but other amps...

@bandit2013 No worries at all!!! I appreciate the information far more than you can realize. Believe it or not, what made me fall in-love with exactly what you mention about the JP2C (other than video clips) was the Fractal model LOL!!! I know that seems weird and backward. You have no deal how...

@bandit2013 Do you mean the note definition and tone density of the JP2C or the Mark VII?

There is no audible sound when I tap the power tubes with a pencil. Thinking the issue is deeper than just tubes... pass on this one LOL!

Couple extra pics. The power tubes in standby... ...the power tubes not in standby... Everything seem normal?

Long story short... it didn't work LOL! I had four 12AX7's around and used them in every combination I had to test them, using one of the "original" tubes alternated at any time.. I lost track of how many combinations that was LOL! It made no difference at all. No better or worse. I noticed...

@bandit2013 That's going to be my question today, now that you all have shown beyond the shadow of a doubt that this isn't totally factory. They could even be super low-rated ECC83's. Or just bad. I currently have the amp to look it over and will replace those two tubes and see how it is, then...

Tube report: both of the JJ's are standard ECC83S's and are in V2 & V3. The 6L6's are STR 443's with a code of GRY. Nick

Thanks @bandit2013 !!!! I assumed they were just regular old JJ 12AX7's, but will take a second glance at them AND see which slots they're in!!!