here are some marshall mod schematics!!

[Kapo_Polenton]

Hey xenrelic, that is really great that you share your mods by the way. There looks like there is a lot packed into that amp. Helps give ideas as well for those of us who like to tinker. You are squeezing an awful lot into three preamp stages!

 

[xenrelic]

Hey xenrelic, that is really great that you share your mods by the way. There looks like there is a lot packed into that amp. Helps give ideas as well for those of us who like to tinker. You are squeezing an awful lot into three preamp stages!

Thanks, Kapo. It's actually 4 gain stages, you should see the two channel version... The way I fit everything into a 50watt chassis looks pretty neat. Standoffs and cable ties are our friends! :]

 

[LP Freak]

Hey xenrelic, that is really great that you share your mods by the way. There looks like there is a lot packed into that amp. Helps give ideas as well for those of us who like to tinker. You are squeezing an awful lot into three preamp stages!

Thanks, Kapo. It's actually 4 gain stages, you should see the two channel version... The way I fit everything into a 50watt chassis looks pretty neat. Standoffs and cable ties are our friends! :]

Pics.

 

[MississippiMetal]

The Langer mod is 3 consecutive stages of the 2k7/470n cathode arrangement. .47uF, not 4.7uF. Devil is in the decimal. May also benefit from a plate bypass at some point due to the treble peaking. Oscillation isn't as much a concern with this circuit due to the incredible amount of gain that is being dumped between stages due to the 68k grid leak resistors.

 

[syncrodude007]

randall /xenrelic modded some of my fx pedals...top shelf work...good dude

 

[FUZZboat]

mucho gracias

 

[FUZZboat]

Smoother gain version 3.1 http://img838.imageshack.us/img838/6065/xloschematicv31.jpg

mucho gracias

 

[khelstrom]

Hey bmf5150,

Your schematic shows two resistors in parallel across the transformer but your parts list states 330 ohm resistors. How can this be? Two 330 ohm resistors in parallel would equal 165 ohms. Am i missing something? Could you shed some light on exactly how the transformer leads are connected?

Thanks