EVH Marshall NOT modified??

rockstah · Post by **rockstah** » Wed Nov 22, 2006 3:28 pm

cary chilton wrote:Kewl! Which trany is it that affects your tone so much the output or power trany?
Mark, in your latest mod in your amp, what tranformers do you have?

I have that OEI 100 watt plexi tranys are supposed to the shit. My 67 trany is on the way out, should I buy the OEI when I need to replace it?

merc ojm100sl OT and georges dual tap PT

cary chilton · Post by **cary chilton** » Thu Nov 23, 2006 8:33 am

Which trany affects tone the OT or the PT?

Is mercury better than oei?

cary chilton · Post by **cary chilton** » Fri Nov 24, 2006 9:58 am

nobody willing to information share?

mightymike · Post by **mightymike** » Fri Nov 24, 2006 10:40 am

Both, but the OT more.

The different volatges of the PTs change the feel, but an OT change is a huge difference.

cary chilton · Post by **cary chilton** » Fri Nov 24, 2006 12:59 pm

PT = supply trany, right? Can you describe the feel? Examples, sounds interesting

BrownSound1 · Post by **BrownSound1** » Fri Nov 24, 2006 3:55 pm

It's a subtle thing really. Using a Variac would be much more pronounced way of seeing how a PT effects tone...just because you're changing the voltages supplied to the components. Things are are going react differently at certain voltages..maybe give you some sag or whatever. No audio signal goes through the PT, so there isn't necessarily a "wow" factor with a PT change. The output transformer though...that's where the magic is.

Tone Slinger · Post by **Tone Slinger** » Thu Nov 30, 2006 10:40 pm

I think that the Cerrum and other early accounts of Edwards amps are correct. Those references seem to have influenced Ralle on his spec. Eddie's amp did have 3 switches in front which made it a non American export Marshall. Thanks to this Forum the "Brown" sound isnt so elusive any more. Rockstah used a 1200 series spec with a PPIMV and nailed it, as did Ralle who used a similar circuit and attenuater/load box set up. The 4/12 with 25 reissues(yes even the new ones) are also key. It seems that "Softening" the sound with the switchable PT or variac is also of signifigance. Some seem to have the amp teching down, but not the playin, but when the two meet, you can hear it. There's no secrets.

master keeper · Post by **master keeper** » Fri Dec 01, 2006 2:42 am

cary chilton wrote:THe first time I did that test I only score 74, I did it again to 86 then 91.7. Try it again when you can, I am sure you will score well.

My amp is got to a 12 series, for sure since it is a 1967. Where did you get a bare bones kit? How the hell did you learn to fine tweak the amp to sound so good that that other fellow said you amp sounds spot on (that poster said he saw many of Ed's amps). I think that is remarkable you could so exact!

This is a '67/68 12-series:

Yours could just as well be a 10-series '67, if it indeed is a '67.

cary chilton · Post by **cary chilton** » Sat Dec 02, 2006 3:32 pm

what is" cerrum?"

How many guys here have built there own 12 series like Rockstah? Seems like many have

Guitar Adjuster · Post by **Guitar Adjuster** » Sat Dec 02, 2006 3:37 pm

cary chilton wrote:what is" cerrum?"

How many guys here have built there own 12 series like Rockstah? Seems like many have

Cerrum===Chris Merrin, he builds transformers among other things. He is out in California. PM me if you want his phone #. Many of us on the board have built a 12xxx clone. It was my first build a 1 1/2 ago, I am on #6 now

cary chilton · Post by **cary chilton** » Sun Dec 03, 2006 4:43 am

Are cerrum trany's better than the mercury tranys?