Easiest way to convert Traynor tube PA to proper guitar amp

[disorder]

I recently purchased a Traynor YVM-1 (http://www.lynx.net/~jc/yvm-1.jpg). Its a 4 channel tube PA amp, with 4 single 12AX7 gain stages feeding a 12AX7 PI and 2 x 6CA7 power tubes.

It seems like this amp is a great platform to mod and I know a lot of people have reconfigured the preamp to get something close to a Marshall sound.

I guess to start, could I simply copy this schematic as is? (https://robrobinette.com/images/Guit..._Schematic.gif)

Add the grid stopper and cathode res/cap to stage 1 V1A... run that into stage 2 V1B acting as the "cold clipper" stage, use stage 3 V2A as a cathode follower before the tone stack, and then move the master volume after the tone stack before the PI?

Or is there something big I am missing? I don't need this to be as close to a Marshall or any specific amp as possible, just looking for classic guitar sounds.

[PRR]

It IS a guitar amp already?

Just with 4 inputs and a mixer. It works fine using one input.

That's not a Fender/Marshall tone control but Ampeg and others used it often.

It's got NFB around the power stage but hardly-any, just like Fender or Gibson.

You might want 5k+1uFd cathode network in an input triode to handle hotter guitar pickups.

[Ben N]

I've got one of those! I bought it years ago to "Dumblize", but then I decided I like it the way it is. If I were to do something simple with it it might be (a) to sub (or add) grid stoppers for the coupling caps off the input jacks, (b) put some cathode R/Cs to taste on one or more of the preamp triodes, and (c) to run a couple (or three) of the channels in series--as easy as moving some wires off the volume pots.

And of course the standard modernization/safety stuff in the power supply (3-prong cord, remove hum ground switch from the circuit and put it to better use, remove death cap).