twin tube mayhem problems

mr twin

New member
hi guys,
i need some help, advice or whatever you can offer me.
Im from australia, i have an early 80s/late 70s point to point hand wired Eminar 100 twin reverb 212 combo.
for those that are unfamiliar, they were produced in mebourne australia in the 70s-80s as a local equivalent of the then marshalls and fenders.
mine is supposed to be based on the early fender 100 twin reverb. im running tad 6l6gc str (rca black plate remakes) biased at approx 21 watt
plate disspation. off memory it was running around 592volts on the plates, with around -34.7volts on the cathodes and 33.8mA bias current using the 1 ohm resistor method.
speakers a a pair of vintage 30 celestions.

Playing straight guitar into amp through my gibson Lp standard with "alnico 2 pro slash" pickups (and any of my other guitars for that matter, i.e.:76 ibanez artist with she invaders, early eighties washburn with the standard dimarzio's and my tele) the amp has a nice big deep sound that when pushed starts to break up and sound very Acdc but with heaps of bottom end grunt.
i can get a nice sound from my boss md2 mega distortion pedal and my boss me70 but as with all things solid state, i felt the tube warmth was missing from the sound.

So I did a lot of research on pedals and after watching demo video after demo video, i was really impressed with Frank Falbos demo of the twin tube mayhem, so i purchased one.

well this is where my problem lies,
no matter what i do, I can't get a nice sound out of it. using it as a pre amp, using it before a boss eq pedal, using it straight.
i can even dime my amp to get that beautiful cranked tube breakup and then when i try to use the mayhem as a boost pedal it all goes backwards.
i had big expectations of this pedal but now am just scratching my head.
im a second year electronics tech so i do a lot of my own repairs my self.
is there any trim pots or adjustment inside the mayhem that i can adjust?
no matter what i do, i just can't seem to tune/adjust the scratchiness out of the sound for rhythm playing.
I can get a reasonable lead tone out of the mayhem but nothing else.
i have different guitars set up for the different styles of music i play. everything from slash to nickel back to alter bridge etc.

any advice or help would be most appreciated.

ps when ive tried to eq the sound the worst of the scratchiness/problem area, seems to be around the 3k, 6k etc. even with the mayhems treble cut to 0 and the upper mids cut right back also.
 
Last edited:
Re: twin tube mayhem problems

I have a 68 Showman amp, not that different from your Twin-alike. I've used the Mayhem through that amp once or twice but for the video I ran straight into a power amp. So any good Fender clean should allow you to get the kind of sounds I got in the video, but ANYTHING is possible. It's possible yours is a little different because of the tubes or parts tolerance, etc. There are tons of reasons it might not be a good fit with your amp.

It's not really my sound so if I was to use it with my amp I'd probably do different things than you would. Some guys have found it behaved best with the gain lowered and a Tube Screamer in front of it. There are no trim pots to adjust. If you truly know what you're doing (no one would recomend you touch it if you don't) then you can massage the corner frequencies of the active EQ circuit, you can reduce the gain of the solid state input stage (I would recommend that) and if you're really experienced, there's room for another tube gain stage.

I also found that "Fenderish" tone stacks aren't very well matched to the Mayhem. You can't address the problem frequencies as well. I think it works better to have a graphic EQ or powerful parametric EQ.
 
Re: twin tube mayhem problems

Had a Whampler Train Wreck with the same problem. Ended up just selling it and chalking it up. Good luck.
 
Back
Top