Marshal JCM800 2210 FROM SCRATCH !!! HEEELPPPP !!!

[guajiro2000]

From Spain, Barcelona, dear friends!
Let me introduce myself, my name is Frank, and I am a musician, guitarist and rocker.
I've seen here photos of Marshall JCM 800 2210, a stunning amplifier!
I'm trying to build one from scratch, but can not find enough information online, there are no good photos of electronic circuits.
It would be helpful if someone could give me detailed photos of the electronic circuit for the front and back, which are detailed in the values ​​of the electronic components and printed circuit tracks.
It can be hard work, but if necessary can say the cost and will pay it with pleasure.

Sincerely grateful.

I hope someone can do for me.

Thank you very much.

Receive a warm and friendly greeting from Frank.

[Firetone]

Can't realy help but DR Tube got some info:
http://www.drtube.com/marshall.htm#JCM800-2210

[Gibsonman63]

Welcome, guajiro2000.

I owned a 2205 for a while (Split Channel 50W Head) and I still have my 4210 (Split Channel 50W combo) The schematics are readily available, but not the layouts or boards. You might consider building a 2203, which is the single channel 100W JCM800. The boards are readily available,, it is an easier build and most people prefer the tone over the split channel amps. Also, there are tons of mods for the 2203 and with a home built amp, you don't have to worry about hacking up a vintage amp to try them out. I don't believe that you will be able to build a 2210 without having to do a lot of the design work yourself.

Here are the issues with the JCM800 split channel amps as I see them.
1. Channel bleed - The tone controls from the two channels are interactive with each other.
2. Switching - They have an IC chip mounted on the circuit board for the switching (1985 and later). If I was redesigning, I would use relay boards, since you can't buy the PC boards anyway.
3. Layout - The board is layed out where the preamp tube wiring crosses back over itself. On the stock amps there are a lot of lead dress issues as well. (Incoming AC mixed with B+, poor heater wiring layout, etc...)

Search Marshall 4210 on this forum and you can see some of my pics.

There is a lot of good reading on Marshalls here:

http://forum.metroamp.com/viewforum.php ... 6c49043ec3

[jelle]

Why not just buy one....with the cost of parts involved, I would be surprised if a home built one would be cheaper... Plus these amps are a bit complex so the designing phase will take a long time.....

Hope this helps. Jelle

[jjman]

I wouldn't want to spend the Euros to buy at the price it must be in Spain for a real JCM800. JCM800 "clone" kits are out there no?

[xtian]

JCM800 "clone" kits are out there no?

Yes: http://ceriatone.com/productSubPages/BS ... 0_2003.htm

[guajiro2000]

Thank you very much everyone for your comments and help, but I explain my reasons for doing a 22010 from scratch:
1 - Do not try to buy a 2210, that's easier, I think in the effort and the satisfaction of creating things and make them work.
2 - I am electronic engineer and I can design and manufacture a PCB without problems, but I respect the distribution of the original circuit with some personal modifications, so I need the pictures.
3 - I've assembled some amplifier kit, but the sound is quite normal. I prefer the Marshall sound.

I hope to find the damn pictures at some point, thanks anyway.

[diagrammatiks]

Thank you very much everyone for your comments and help, but I explain my reasons for doing a 22010 from scratch:
1 - Do not try to buy a 2210, that's easier, I think in the effort and the satisfaction of creating things and make them work.
2 - I am electronic engineer and I can design and manufacture a PCB without problems, but I respect the distribution of the original circuit with some personal modifications, so I need the pictures.
3 - I've assembled some amplifier kit, but the sound is quite normal. I prefer the Marshall sound.

I hope to find the damn pictures at some point, thanks anyway.

[img:860:645]http://av-pix.com/2010/Marshall_JCM/JCM800-A.JPG[/img]

[rp]

Welcome aboard. Must it really be a 2210? Have you built tube amps before? If not then really go with what Jelle said, very good advice.

Then build something much more practical for a first tube amp that there is a ton of web info and parts for like a JCM800 2204 or 2203 (or go even more retro with a JMP50, JTM50 or JTM45 etc. All great sounding amps, all variations of the basic 5F6A, I think you'll learn a lot more this way than than just jumping ahead to a 2210.

Here's a start on a 2204, and you can search this forum too, plenty of discussions:

http://www.mhuss.com/MyJCM/index.html