Ground Zero Ampworks modded Mesa Triple Rectifier Rev G

  • Thread starter Thread starter RedPlated
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That sounds fantastic - great work! I’d be interested in one of those if that mod goes on general release for sure….
 
Wow...From that short clip, I'm very impressed. Are you going to actively offer Mesa Recto mods?
Yes, I definitely hope to do that. I'm playing catch up right now with amps but that's the plan.

You modding everything?
Haha, no. My original plan was just Marshalls only. But a couple strays have made their way on to the bench. I really like this recto mod. Lots of clarity and articulation with killer feel. Makes you want to play more, if you know what I mean (I know you do!).

Have you ever modded or cracked open a JCM 2000 DSL? I may want you to mod mine for a nice modded plexi on the green channel and a hot rodded 800 for the red channel.
Never got into those amps. Had a couple of them back in the day but nothing recent.

Sounds great ?

What made you want to take on a recto? I have to say it sounds very unique. I hear a cross between Mesa mark and recto like it’s an earlier version recto of some type.
That's a great question...!

I bought a Rev G from a buddy of mine recently with the intent of "slightly" tweaking it and seeing f I could get along with it. I've had a couple Rev F's and a multi watt in the past. Didn't really like any of those. However, you know how out goes and many weeks later I was still tweaking the thing. The circuit was much more of a challenge than I expected. Inter-stage signal control needs to be very precise to get the right sound. Easy to have too much signal, or lack of saturation going the other way. Also, getting the taper of the gain control right is very difficult. So that there is a usable range of gain, without losing definition when turned to 10. As you know, a stock recto goes to mush after 6 or so on the audio taper gain pot. Right when the signal really starts kicking in.

Another thing that took a long time was keeping that recto core signature tone. I really wanted to retain that. Some mods just remove to completely.

Wow! This sounds great! Gonna do more than only one?
So far I've done 4 with one more sitting on my shelf ready to get done. These are all for local guys, sort of the trial run. I do plan on doing more once I can catch up with other commitments. I really enjoy the sound and response of this circuit and would love to offer it publicly.

Man Jeremy i love this thing, its sending my Rev F Hermanssons packing!!!!
Glad you love it man! I also was digging your clip you posted on FB. Definitely showcases the heavier side of the circuit.

That sounds fantastic - great work! I’d be interested in one of those if that mod goes on general release for sure….
Thanks, hopefully soon!
 
Yes, I definitely hope to do that. I'm playing catch up right now with amps but that's the plan.


Haha, no. My original plan was just Marshalls only. But a couple strays have made their way on to the bench. I really like this recto mod. Lots of clarity and articulation with killer feel. Makes you want to play more, if you know what I mean (I know you do!).


Never got into those amps. Had a couple of them back in the day but nothing recent.


That's a great question...!

I bought a Rev G from a buddy of mine recently with the intent of "slightly" tweaking it and seeing f I could get along with it. I've had a couple Rev F's and a multi watt in the past. Didn't really like any of those. However, you know how out goes and many weeks later I was still tweaking the thing. The circuit was much more of a challenge than I expected. Inter-stage signal control needs to be very precise to get the right sound. Easy to have too much signal, or lack of saturation going the other way. Also, getting the taper of the gain control right is very difficult. So that there is a usable range of gain, without losing definition when turned to 10. As you know, a stock recto goes to mush after 6 or so on the audio taper gain pot. Right when the signal really starts kicking in.

Another thing that took a long time was keeping that recto core signature tone. I really wanted to retain that. Some mods just remove to completely.


So far I've done 4 with one more sitting on my shelf ready to get done. These are all for local guys, sort of the trial run. I do plan on doing more once I can catch up with other commitments. I really enjoy the sound and response of this circuit and would love to offer it publicly.


Glad you love it man! I also was digging your clip you posted on FB. Definitely showcases the heavier side of the circuit.


Thanks, hopefully soon!
I can see scoring a Rev G for this. Edited to ask if it would also work on a 3 channel Triple Rec?

I'm curious what your thoughts would be on modding an SLO for a similar sound. I know that the Recto is based on the SLO, but also sounds quite different. Would they even be in the same realm?
 
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That sounds great man. Like Sam said, would love to hear the orange channel.
 
Another thing that took a long time was keeping that recto core signature tone. I really wanted to retain that. Some mods just remove to completely.
can your mod be done on other recto models or just the 2 ch's?
 
can your mod be done on other recto models or just the 2 ch's?
I’m fairly positive it’ll have the same result on a 3 channel. I just haven’t had the time to test on one. The R&D process for this one alone was at least 50 hours. So it’s hard to squeeze them in between builds etc…

I just happened to pick up a Rev G that my buddy was selling. So that’s the first version to get developed.

It’s surprising that Rev G’s are getting harder to find. They made 1,000’s and 1,000’s of them. I remember a few years ago they were $900 all day long.
 
@RedPlated

Sounds amazing Jeremy!! Great work as usual.

Does this change the orange channel at all? I tend to live there on Rectos.
 
I’m fairly positive it’ll have the same result on a 3 channel. I just haven’t had the time to test on one. The R&D process for this one alone was at least 50 hours. So it’s hard to squeeze them in between builds etc…

I just happened to pick up a Rev G that my buddy was selling. So that’s the first version to get developed.

It’s surprising that Rev G’s are getting harder to find. They made 1,000’s and 1,000’s of them. I remember a few years ago they were $900 all day long.
I don’t get it either. Used to be able to swing a dead cat and hit one. I swear there’s amp buyers who are only about the investment and when they see prices rising they buy a lot of the amps and just hold on to them waiting for a perceived peak. This kind of happened with 5150’s as well. Used to see them all the time for 4-600 and once the prices started going up you would see a lot less of them around.
 
A DSL is a weird amp. Vintage gain doesn’t snap like an 800 does and can be a little too thick and the lead channel is way too thin and raspy in comparison. They made a two channel amp that was unusable as a two channel amp. The EQ disparity was so big between them. Those amps just need the channels better balanced with a thickening and gain reduction on the lead channel and a leaning out of the vintage gain with a more snappy top end. Make the low end resonance button variable with a knob like should be done on a 6100 and the amp could be very nice.
 
I can see scoring a Rev G for this. Edited to ask if it would also work on a 3 channel Triple Rec?

I'm curious what your thoughts would be on modding an SLO for a similar sound. I know that the Recto is based on the SLO, but also sounds quite different. Would they even be in the same realm?
I have a feeling it’ll work similarly on a 3 channel. I just happened to have a 2 channel handy so that was the first one to get developed. I plan on doing some R&D on a 3 channel when I get the time.

SLO is similar in preamp but things like filtering are different. I experimented with higher filtering in the recto. It sounds killer but starts to sound like a mark if you go too far. I did adjust the filtering a little for this mod.

@RedPlated

Sounds amazing Jeremy!! Great work as usual.

Does this change the orange channel at all? I tend to live there on Rectos.

It affects both channels. Orange sounds killer too. More mid heavy for sure. The cleans are actually improved as well with the mod.
 
Here’s an SM57 on an V30, into my iPad. Another one I just wrapped up yesterday.

Bright switch was off. It’ll get more saturated with it on. I actually like the sound and feel with it off the most.

 
Here’s an SM57 on an V30, into my iPad. Another one I just wrapped up yesterday.

Bright switch was off. It’ll get more saturated with it on. I actually like the sound and feel with it off the most.


DAMN MAN! You're gonna make me sell a Kidney.
 
Well I was satisfied with my MOAB…I guess I have to find myself a recto now…thanks a lot Jeremy haha
 
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