Question On Modded Jcm800 4010

[thomasec]

A JCM800 4010 combo just showed up in my area, and I have been looking for a clean one for about a year now. It looks like it's in great shape, but the owner just informed me that it had a push/pull mod done to it. I'll just post what he said:

"The amp has a push-pull pot modification on the master volume. I forget exactly what part of the circuit it modifies, but it cuts a resistor and the result is an amazingly clean, natural overdrive"

I'm not especially tech savvy, so if anyone could give me an idea of what this mod does, I would really appreciate it! D

 

[mickeydg5]

Honestly we would have to see the modification to know for sure. There are many ways to pull it off.

 

[Mitchell Pearrow]

A JCM800 4010 combo just showed up in my area, and I have been looking for a clean one for about a year now. It looks like it's in great shape, but the owner just informed me that it had a push/pull mod done to it. I'll just post what he said:

"The amp has a push-pull pot modification on the master volume. I forget exactly what part of the circuit it modifies, but it cuts a resistor and the result is an amazingly clean, natural overdrive"

I'm not especially tech savvy, so if anyone could give me an idea of what this mod does, I would really appreciate it! D

Welcome to the forum new brother, I cannot answer your question, but be patient others here with more knowledge than I will come along and help you! Cheers Mitch

 

[thomasec]

Yeah, apologies for the vague post! I'm trying to get in touch with the amp tech who did the mod, but it sounds like this is actually a "bright cap" mod based on what the amp sounds like, and what I've read online.

 

[MarshallDog]

Gut shots for sure!

Anyway, I have this amp and it is one amazing amp!

Congrats and welcome to the forum?

 

[thomasec]

So I found another JCM800 4010 that is unmodified, with the G12-65 speaker. What do you think, should I get it?

I will pretty much do whatever you guys tell me to do.

 

[Jethro Rocker]

So I found another JCM800 4010 that is unmodified, with the G12-65 speaker. What do you think, should I get it?

I will pretty much do whatever you guys tell me to do.

Duh!!
Just kidding!! Well yeah if it's within budget and that's what you're after. Fantastic little amp. Your decision though.

Or, if you're rignt about doing whatever then send it to me!!

 

[Mitchell Pearrow]

Duh!!
Just kidding!! Well yeah if it's within budget and that's what you're after. Fantastic little amp. Your decision though.

Or, if you're rignt about doing whatever then send it to me!!

 

[Mitchell Pearrow]

So I found another JCM800 4010 that is unmodified, with the G12-65 speaker. What do you think, should I get it?

I will pretty much do whatever you guys tell me to do.

That looks new, the one little snag in the tolex is nothing a black marker can’t doll up, if you have the coin snag it, and ad to the ever growing stable of Marshall’s

 

[SpHj]

A 4010 with a G12-65 is the cats ass. No better club amp. Period.

 

[Gutch220]

I wish I had a 50w JCM800 2x12 combo instead of a 100w head & 4x12

 

[SpHj]

I wish I had a 50w JCM800 2x12 combo instead of a 100w head & 4x12

I had one...trust me the 4x12 and head was easier to transport...

 

[Gutch220]

.....I use a 2x12 sometimes as well. To me, a head with a 2x12 on wheels is perfect.

 

[Jethro Rocker]

A 4010 and 1 closed back extension is damn nice and easy to haul too.

 

[anitoli]

If it's what you want, get it. Life is too short for regrets.