Marshall 5210 solid state mods?

[Matti]

Hi!
I got the 5210 for cheap and it sounds pretty ok, but some mods would be nice though. I'd like to extend the middle pots effect and open up the highs a bit like using presence pot at 9 or 10... I assume 50k middle pot instead of the default 22k would help? What about the treble? I'm lousy at reading the schematics, but I guess the components around pot VR6 make the tone stack.
All help is appreciated!

http://music-electronics-forum.com/atta ... g_0328.jpg

http://music-electronics-forum.com/atta ... ll5210.gif

[RagnarMarGunn]

This is the mod I did on my Marshall 5210, worked excellent

http://forum.metroamp.com/viewtopic.php ... 0x#p301023

[Matti]

Very nice work Ragnar!
I've been thinking about a similar project, but first I'd like to experiment with an easier solution, you know, changing some components on the original amp. My problem is to find the tone stack I know something about tube amps and have rebuilt a JCM800 2203, but this one is different.

[sfb]

VR7 is middle pot. You can also change c23 to .022 to get some low mid.

PS. Uraltonelta löytyy...

[Matti]

Thanks!
I found the tone circuitry around the VR7 and started planning my mods with Duncan's Tone Stack Calculator

[uiovbged332]

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