Recent content by jvk

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Hi, that schematic contains the same error in the switching circuit that was present in the original Mesa schems. Here's the actual circuit: (I've traced more than one 2C, a 2C+ and also MKIVB) https://drive.google.com/file/d/1yHC65i7Ft__IEn9lkj3Nzu-fAOaWGJk5/view?usp=sharing Cheers

Hey. Just reading my old posts and replying to years old PMs and posts :D What happened to your pedal? I build one and modded the circuit to use 9vdc, if I remember correctly. Regarding the frequencies, I tried 6600Hz and found it to be less responsive than 4823Hz - the lower frequency...

Hi George, Long time no speak :) hope you're doing well. The thread was titled "OT Comparison - 562003 vs. 562004 vs. 100W" so I guess that's why I included the 100w OT. Now that I've had all of them at one point or another, I can conclude that all of the Boogie Mark series (and 2:95) simul...

It's a small internet world :) thanks for posting them.

Drugs... are bad for you :roll: And if you ran your fingers accross the guts, you'll no doubt get a very large electric shock from the filter caps :lol:

Well mostly yeah :lol: just enjoy my gutshots then :D

...anyone had a peek inside their Mark V and wanna share? Someone sent me these. Let's see more of the chassis if you have any. They've fitted ALOT in a small space :shock:

That would be easiest mod ever, hell you could even make it switched. All I need is a few weeks with a Mark V to work out it's schematic.

Personally I want complete elimination of all pops and switching noise. This applies to ALL Mesa amps. Popping is difficult to avoid when switching between different output levels (ie different wattage levels), but a $3000 amp should not pop when switching between channels or modes. Other Mfgrs...

The link should be fixed now.

I've been reading posts on this forum by many users with interesting opinions & complaints on their new Mark V amps. Question: If you had your way with re-designing the Mark V, what would you change, improve, add or remove from it's features, in order to improve it and make it your perfect...

Hello gentlemen. Here you go: IIC+ pcb bottom Word of caution... the level of butchery that I've performed here should only be practiced if you don't mind sacrificing the amp (partly at least), because you would be desoldering, cutting wires and/or damaging the pcb traces (amazing how easy...

Hi Gerald, You've stumbled upon a design flaw concerning tube powered serial loops, where about 5% of the dry signal can be heard and you can't get rid of it. Cause: there are in fact two tubes inside the case of a 12ax7 tube. Each side's called a triode, and each can be used as a separate...

The way you describe it, it sounds like the power cuts *completely*, right? First thing I'd do is try a different power lead from another appliance, the lead could have developed a breakage inside it from years of use & abuse. Also try and see if you can reproduce the fault by moving the power...