Cerrem mod as told by Eddie.

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Cerrem mod as told by Eddie.

Postby ampdude on Wed Dec 15, 2004 12:51 am

Eddie mentions the cerrem mod in two guitar player interviews from 1979 and 1980.

Eddie isn't an amp tech so he gets a few details wrong.

He's using capacitor when he really means resistor.

it looks like a stick of dynamite, only fatter (ohmite resistor).

He also mentions where to hook it up

I hook it up to the fuse holder and the mains, and it lowers the voltage
about ten volts so the amp lasts a little bit longer.

He really means he hooks it up across the output transformer primary.

EVH: Yeah. I don't even use fuses in my amps. See, I use a combination of two
different amps. They're both Marshalls, but one of them is actually lower
powered, and the other one is boosted. I use 'em together. One of them has this
giant capacitor - I don't know what they're used for, but it sucks off ten volts.
It doesn't really change the sound, but whatever I use, I use to the max. I just
turn it all the way up. And a standard on-the-market amp won't last that long
doing that. So I put this capacitor in there, which lowers it down to about 100.
You know, a Marshall is under-rated. They're actually like 150 watts, even though
they say they're a 100-watt amp. So I lower it about 10 volts, and it lasts a
little longer. I still have to retube them once a week.

GP: How do you modify your amps?

EVH: Okay, I use a combination of two different
kinds of amps. They’re both Marshalls, but one kind actually has less power than
the other, which is boosted. I use them together. The ones that have less power
have a giant capacitor in conjunction with the fuse; if anything happens, the
fuse blows first. The capacitor has something to do with the computerized
ignition system of a car. I can’t give you the exact specs, but it looks like a
stick of dynamite, only fatter. What it does is suck juice. I hook it up to the
fuse holder and the mains, and it lowers the voltage about ten volts so the amp
lasts a little bit longer. It doesn’t really change the sound, but whatever I
use, I use to the max. I just turn it all the way up. So this capacitor lowers
the voltage and the amp lasts a little longer. I still have to retube them once a
week. (Editor’s Note: This is not a recommended procedure for modifying amps and
should not be attempted by anyone inexperienced in the field of electronics and
amp modification.)

GP: What is done to the other kind of amps?

EVH: I use a
Variac, which is like a dimmer on a lighting system. It’s an autotransformer
which goes all the way from 0 to 160. In the studio I crank it up to 140 and
watch the tubes melt! (Editor’s Note: Again, this is not a recommended procedure
for modifying amps, as Paul Rivera of Rivera Research and Development points out:
“You can cause severe damage to the amp besides melting tubes. Since a Variac is
an exposed transformer, by hooking it up incorrectly you could get the hot of the
AC line on the chassis of the amp and electrocute yourself. Anyone wishing to
attempt this sort of modification should go to a knowledgeable repairman.”)
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Re: Cerrem mod as told by Eddie.

Postby Bombay on Wed Dec 15, 2004 1:23 am

I hook it up to the fuse holder and the mains, and it lowers the voltage
about ten volts so the amp lasts a little bit longer.

He really means he hooks it up across the output transformer primary.
:D I think you are reading a little too much into what is being said here and coming up with the answers you want to hear.
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Re: Cerrem mod as told by Eddie.

Postby BillyBatz5303 on Wed Dec 15, 2004 1:29 am

So he's hard wiring in the resistor in line with the AC to get a variac-set-on-90v type deal?
Now go home and get your f*****g shinebox!
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Re: Cerrem mod as told by Eddie.

Postby ampdude on Wed Dec 15, 2004 3:52 am

That's what he says but he's got it wrong he really means he hooks the resistor across the ouput transformer primary.

Probably someone (one of his amp techs) showed him where to hook it up and that's the best explanation he can come up with, not really knowing what he's doing.

I don't think anyone in 1980 knew what he meant but if you know about the cerrem mod then read the 1980 interview, Eddie must be describing in his own way the cerrem mod.
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Re: Cerrem mod as told by Eddie.

Postby Dave M. on Wed Dec 15, 2004 4:15 am

Or Ed is, as usual, full of s%$#, as he's typically been in interviews.
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Re: Cerrem mod as told by Eddie.

Postby MarshallGuru on Wed Dec 15, 2004 4:27 am

Yes, Edward does tend to forget a few "facts" now & then :D :p
"Can you hear me now" ??? Jim Marshall (aka: "The Father of Loud")
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Re: Cerrem mod as told by Eddie.

Postby Bombay on Wed Dec 15, 2004 11:03 am

That's what he says but he's got it wrong he really means he hooks the resistor across the ouput transformer primary.

Probably someone (one of his amp techs) showed him where to hook it up and that's the best explanation he can come up with, not really knowing what he's doing.

I don't think anyone in 1980 knew what he meant but if you know about the cerrem mod then read the 1980 interview, Eddie must be describing in his own way the cerrem mod.
Without some type of proof other than someones word, because everyone and their uncle has seen the amp and knows what he did, I'd say everything in that interview is a load of bullocks and your still reading too much into what is being said. ;)
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Re: Cerrem mod as told by Eddie.

Postby BillyBatz5303 on Thu Dec 16, 2004 12:41 am

I did catch the foul, disgusting, yet strangely inviting and all too familiar smell of BS when reading it. Lets not forget, love em or hate em the guy was ***hole enough to suggest BS mods he did to get his sound knowing people would copy and blow up their amps. Sorry. Thats such a ********r move.
Now go home and get your f*****g shinebox!
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Re: Cerrem mod as told by Eddie.

Postby ampdude on Thu Dec 16, 2004 2:21 am

Modifying Eddies BS.

change "capacitor that looks like a stick of dynamite"
to ohmite resistor

change "I hook it up to the fuse holder and the mains"
to hook it up across the output transformer primary

change 2 different amps to 1 amp

change variac at 140 volts to variac at 90 volts.
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Re: Cerrem mod as told by Eddie.

Postby Bombay on Thu Dec 16, 2004 2:36 am

Modifying Eddies BS.

change "capacitor that looks like a stick of dynamite"
to ohmite resistor

change "I hook it up to the fuse holder and the mains"
to hook it up across the output transformer primary

change 2 different amps to 1 amp

change variac at 140 volts to variac at 90 volts.
Why not rewrite history as well. :)
It's all just misdirection to keep you and everyone guessing. It made money for the techs back then and it's still making them money now. What a cash cow. :)
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Re: Cerrem mod as told by Eddie.

Postby Hamilton on Thu Dec 16, 2004 4:23 am

Victor, who owns this board, told me that he has seen THE amp. Yes, the first & second album Marshall, the one that a lot of dweebs would probably bow down to, and he said it was near stock.

Sheesh, will this "Eddie" stuff ever end...
"And may you never hear...surf music...again."
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Postby cerrem on Fri Sep 07, 2007 7:13 am

I will not get involved in this particular mod...
But one secret i will let out of the bag that EVH mentioned to me..was that back in the early days bands were VERY competitive and always trying to copy each other...EVH was always trying to hide what he did, since competing bands would come to see his set-up and gear in the clubs.. So thats when he decided to throw everyone for a spin.... He started picking up all sorts of funky pedals from pawn shops and used music shops... he would then run many feet of cable running all over the place pluged into as many weird pedals as possible....So 20% of it was legit and was his actuall set-up, while the rest of it was a pile of SH##T thrown out there to confuse the CR##P out of other guitar players trying to figure his set-up.... I met him 4 times.... The last time was Cardinal Knowledge tour at Jones beach....

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Postby Highwaystar on Fri Sep 07, 2007 7:15 am

Wow almost three years dead, There were tons of threads started on this if you look with the search function, More then I want to remember right now.
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Postby spangled99 on Fri Sep 07, 2007 8:15 am

cerrem wrote:I will not get involved in this particular mod...
But one secret i will let out of the bag that EVH mentioned to me..was that back in the early days bands were VERY competitive and always trying to copy each other...EVH was always trying to hide what he did, since competing bands would come to see his set-up and gear in the clubs.. So thats when he decided to throw everyone for a spin.... He started picking up all sorts of funky pedals from pawn shops and used music shops... he would then run many feet of cable running all over the place pluged into as many weird pedals as possible....So 20% of it was legit and was his actuall set-up, while the rest of it was a pile of SH##T thrown out there to confuse the CR##P out of other guitar players trying to figure his set-up.... I met him 4 times.... The last time was Cardinal Knowledge tour at Jones beach....

Cerrem


That's very funny! All this to-the-last-resistor business is so lame.
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Postby Matt3 on Fri Sep 07, 2007 12:21 pm

What would the effect be of putting a resistor in series with the center tap of the OT? If a resistor really was added to the HT fuse holder (or put inside it) then that would essentially be what's being done. And since current is flowing through the OT it would drop some voltage to the power tube plates. And if it was actually put inside the fuse holder instead of a fuse then the amp would still look stock.
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