Little help please - Marshall value

[stratjacket]

The mod was installed haphazardly. Improper shielded wire techniques, poor heater wrap, and non-shielded wires aren't twisted. I'm literally spending the same time fixing stuff like this on my own. They also didn't ground the un-used triode correctly minus the heaters.

I'm also not a fan of drawing extra heater filament current off of original transformers. I have an original Dagnall in mine and I am removing the pre-amp tube filaments completely from the PT to help it run a bit cooler.

If you want to be able to defeat the mod at-will, a push-pull pot in the back could be installed in place of the new pre-gain to bypass it without harm back to stock without much hassle. I'd want the rest of it fixed at the same time though.

Wow that’s good stuff, thank you. I like the idea of being able to bypass it completely.

As background, I’ve never worked on amps. However, I did spend 6 years in the Navy as an Electronics Technician where I worked on radars down to the component level. So I have basic electronics knowledge as far as ohm’s law, kirchoff’s voltage law, know what caps, resistors, etc...do. Can read a schematic and can solder decently. I’m just not sure what I may need to reconnect if I tried pulling that gain stage out of the circuit. Having a push-pull for it would be perfect.

Could you provide some basic instructions for a push-pull? If not or it’s too much to try to explain, it’s cool.

 

[glpg80]

I could draw up a schematic and send it over in PM. Up to you to do the rest of course

 

[stratjacket]

I could draw up a schematic and send it over in PM. Up to you to do the rest of course

That’d be awesome. You !!

 

[stratjacket]

PM your email too. I’ll send you something as a token of appreciation.

 

[SpiderWars]

I like these pull-pots.