NCD Marshall SV212

Hi

Some months ago I bought an used Studio Vintage SV20H to mod It. I prefer JTM45 or 1986 (Superbass 50W) circuits than 1959 or 1987 (Superlead) circuits. Also I prefer standard Marshall look than ST20 look But there is nothing wrong in a SV20H. After tryed 1986 and JTM50 circuits I found ST20 schematics then I moded to ST20 specs. Studio Vintage, Studio Classic and Studio JTM (ST20) use same transformers. To mod a SV20 to ST20 it's really easy. No extra holes just take out some components and replace value on some other components. I love this little amp (ST20H) I think it's the best Marshall Studio of all.

Today arrives an used SV212 cab from 2021. I thought I couldn't install Marshall standard casters but I was wrong. It has Celestion V type speakers made in china. They sound nice but I need try It properly yet. Let's see. Maybe I'll install a Creamback 65W pair but I'd like sell the V type ones first.

Congratulations, good looking cab, nice work on the mods to bring the SV specs to ST.
Enjoy them.

That's really cool, man. I didn't know they were similar enough to mod that way.

DirtySteve said:

That's really cool, man. I didn't know they were similar enough to mod that way.

Click to expand...

Here the differences where you need install this components.

C101 100pF 500V
R102 56K
C103 220pF 500V
Shared cathode on V1, you need join pin3 to pin8
Take out R33 & C32, you need remove V1 socket
C33 22nF 400V
C30 220pF 500V
Take out C54
R28 1K you need remove V2 socket
R24 & R25 470R 5W

Then NFB R20 27K to 4R OT tap. You need cut CON306 one wire on rear PCB speaker section and connect It to 4R OT tap.

After testing It properly I love this cab. V type speakers are great.