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What could cause the volume drop on my Mark 3? I have tried new power tubes but, it didn't help. Could it be caused from a bad preamp tube?

Looking for a good source for tubes for a Mark III. Would like to get a pair of the SED 6L6s and SED EL34s. I have tried using Dougs Tubes and The Tube Store for power tubes with not such good luck. With Mesas fixed Bias it's picky on power tubes. Any suggestions. I've used Mesas 6L6 440s but, I...

Looking for the best overdrive to use as a clean boast or overdrive with a Mark III? Wanting something to use as a alternative to R2 for rhythm playing.

Anyone using a Fulltone OCD with there Mark III? Currently I have Been using a Xotic AC Boaster as a overdrive for a rhythm playing instead of using rhythm 2 on the Mark III. I tried the Fulltone OCD at Guitar Center thru a Lonestar Classic and it sounded killer with my Paul. Haven't tried it...

Just wondering if a plate current of 24.1 and 23.6ma will work with my Mark III. I will be running these with a pair of Mesa EL34 442s in the outer sockets.

I'm noticing a difference in volume in the channels on my Mark III. Could it be something as simple as the V2 preamp tube going bad, because if it where power tubes it would be all channels?

Looking for preamp tube suggestions for my Mark III Combo. I know this has been covered before but, I'm looking for fresh ideas. Also has anyone used a 12at7 instead of a 12ax7 in the phase inventer and R2 for a smoother tone? Thanks for your help.

Looking for ideas for preamp tubes to get a more aka Marshall type rhythm out of rhythm 2 on a Mark III red stripe. Any suggestions!

I bought a set of the Mesa EL34 STR 450s for my Mark III and didn't like them a bit. Well maybe a little but, I think the 442 sounds better. Mesa no longer sales the EL34 STR 442s. Where can I find them?

To continue on from my post about output tube glowing and hum. It seems like I got the problem fixed for a short time. One of the outer tubes (EL34s) would glow bright red in the center and the amp would hum. I found a broken wire at the tube socket and had it fixed. Well I used my old tubes...

I have a Mark III Combo w/ 6l6/EL34s. One of the EL34s will glow and the amp starts humming. Once I turn it to standby and back on it goes away. Its happened twice now in the last couple of weeks. Could it be just the power tube going bad or something else?

It looks like I broke one of the prongs off the plug for the fan in my Mark III combo. How easy is this to fix? Can you just replace the plug on the end?

Can you run a single C90 speaker in 4 ohms? I have a Mark III simulclass combo w/C90 speaker.

A few months back I changed out my original reverb tank in my Mark III because, some times it would work and sometimes it wouldn't. I replaced it with one from Mesa. The new tank seems to have more reverb but, it doesn't sound as good as the old one. It has a lot of sizzle and is bright in stead...

I'm looking to make a footswitch to cover all channels and reverb/eq. Anyone have a schematic of the footswitchs for a Mark III?

My reverb has quit working on my Mark III combo, I think. I can move the reverb pan around in the bottom of the amp and hear the springs and have checked the reverb tube. Any suggestions? Can I try cleaning the reverb cables ends with Caig Deoxit?

I've noticed a change in the tone of my Mark III combo in the last couple of weeks. I started getting a thinner and more crispy type of tone. Where before I had a nice thick and smooth sound. What would be more likely the problem, a preamp or power amp tube?

It seems that my reverb isn't working correctly. I can move the reverb pan in the amp around and can hear the springs vibrating, but no reverb sound. Please help!

Looking for good settings to use with a Fender Stratocaster w/ stock pickups and Mark III combo. Any suggestions.

I've noticed a strange ringing sound or what is called a ghost note when playing a open G chord. It does this using any of the channels clean or dirty. I had the amp serviced a year ago by Mike B at Mesa and he gave it a clean bill of health. So I wouldn't think it was the filter caps. Could it...