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I searched everywhere on here but had no luck. Im interested in slightly lowering the gain on R2 in my purple stripe. I already have the R2 volume mod. I have my R3 channel dialed in fairly low so I need more separation between R2 and R3. If I could lower the actual gain in R2 that would be...

Hey all. I just installed a bias pot to bias the power tubes properly. Im wondering how I can check the voltage with my DMM now? Thanks

I was wondering why mesa made the Mk3's reverb come before the effects loop in the chain? Was there a reason behind this? Would the amp operate ok if the reverb was changed to after the loop? If so, could it be modded to do so? I play mostly clean and think the reverb would sound better after...

I would consider trading my Mk III head for a lonestar head. The purple stripe has had a bias pot added as well as a Pentode triode switch. This thing is special but lately I have been only using the clean channel for my band so I don't make use of the other fantastic gain channels. I figure if...

So I'm pretty much done tube rolling for the exception of buying a NOS Mullard long plate or I61 codes made by phillips labled Mullard, Siemens, Valvo or Amperex. I have a NOS telefunken (smooth plate) and NOS Tungsram for sale or for trade for a Mullard like the previous discribed. If someone...

I Want to trade my 8 ohm for your 16 ohm. This is for a pair of Celestion V30's

I have a cab with two 8ohm speakers that each have their own separate cable so I can use one at a time or both. Mesa states if you have two 8 ohm speakers to plug 1 in the 4ohm and the second in the other 4ohm jack. I guess because it's wired in parallel? Anyway I noticed when I have just one...

I would like to sell or trade my mint celestion black shadow mc-90 for your V30. Or paypal. 8 ohms is the situation. Hit me up if interested. Peace

Trade my pair of Nos winged c 6l6's for a pair of winged c el34? Hit me up if your down. I also have a pair of NOS RCA 7027a's I'd be willing to trade.

I have a fully loaded Mark 3 Head purple stripe Simul-class. It has the R2 mod, Bias mod, GEQ and a Pentode/triode switch. What more could u need!? It is in great condition and was recently serviced and Re capped. I'm looking to sell or trade for a mark 3 red stipe head with GEQ. I know it's...

Would like to hear your thoughts on this. Mainly the clean channel because that's where I live 90% of the time. In reference to the MK III but would also love to hear about the differences in the MK II as well. Pros/Cons? Difference in tone and feel? Anyone own both? Audio clips? The reason...

I have a mint condition black shadow celestion mc90 (8ohm) that I would be willing to trade for a v30. If your interested in buying through paypal instead hit me up with an offer. Thanks!

I have my mark iii open currently and was dialing in the tone stack when I thought of something. As I'm sure mark owners know these amps are very touchy on the tone knobs. The slightest move makes a huge difference. What I would like to do is customize the pot taper around my magic value...

I was wondering if anyone has experimented with different values on the cathode caps on the mark 3? I've read that it is a pretty popular mod on mark ii's to lower the uf some to reduce unnecessary bass in the first stage. I feel I could benefit from a small reduction in bass on my purple...

So I've read around the Web that lowering the uf of the decoupling caps in an amp will reduce the bass some and can help with woofy issues. I was wondering if anyone has input on this type of cap adjustment on the mark series? Am I correct that these are the 3 big electrolytic 30 uf caps? I'm...

Hello again. I was wondering if anyone here has tried using 7027a tubes in their boogies? Particularly the Mark III? I know there are 2 extra pins on the 7027a's, but I need to know if the only way to make it work is to snip the extra pins? Or if it is not necessary to snip. The tubes...

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Has anyone ever tried 6550's in a mark amp? I have a mark iii. I want to try different power tubes and want to maximize headroom. I currently have winged c 6l6 and el34. If I switch to all 6l6 I should gain a small amount of headroom but is it possible to try winged c 6550 to really increase the...

Title says it all. I'm looking to sell or trade my matched pair of NOS Winged C EL34's. I would also consider a trade for your pair of Winged C 6l6's. Strait sell $115 shipped.. I figure this is a great place to post because these tubes are amazing in Boogie's! Hit me up!