Valvestate 8040 transformer taps

[dweingarden]

I bought a Valvestate 8040 used. Looks like parts have been replaced before and the boost channel is not working.
The voltage on the tube's heater is...

[jondoe]

Hi All,

I have a Marshall Origin 50 which is misbehaving, I don't often touch valve amps so I was hoping I could share the problem with the great...

[Yankazaz]

Hi guys,

My Code 25 amps has an issue, as after some minutes after power on (working out loud as normal), then it automatically going in silent....

[asfi]

I have a vintage Marshall 2203 JCM800 on the bench and the impedance selector is intermittent. Tried looking inside the selector to see if it's repairable...

[Jaoon]

Hey Guys,

so i finally tried to fix my old Valvestate vs100. Iam far away from an Expert. I can repair my guitars and stuff but never tried...

[JamesFilth]

Hi!
I recently bought used Marshall VS100 combo. I noticed that it hissess a little bit on clean channel. It's not that loud, but it's slightly annoying....

[evil79]

Did work on a 4100 JCM900 w/5881’s. Cap job, replaced tubes, replaced a few burnt resistors, resoldered almost all solder joints, cleaned jacks and...

[trip]

Can someone help me with next steps here?

bought this "amazing build" but it was redplating

So i'm reading that this...

[GasMask52]

Hey all once again ,

A day after jamming with my Marshall Valvestate VS100 (That was working like a charm) , I noticed a constant sooshy-windy...

[Stoffie1974]

Hi,
It's been a looong time i came here, but i had to do this one...

I had to service my DBS 7400, it made i clipping sound on higher volumes...

[GasMask52]

Hey all new around here -
My Marshall VS100 was 100% alive when suddenly the Clean channel reverb stopped working (But the Overdrive Channel Reverb...

[christarak]

Greetings from chilly Sydney.

I’m hoping you can help me out with a Marshall JTM60. It came in as “not working”. I got that...

[Scottjo64]

Hi,

Real quick, with nothing plugged in and the FX loop at max, I get what can only be described as "alien white noise". Two heads,...

[brady]

Hey everyone, I'm new here so be gentle. I purchased a Marshall AVT100 Valvestate 2000 1x12 combo amp off of a coworker of mine because he gave me a good...

[Palomacy]

Hello dear MEFrs,
I'm trying to keep it as short as possible:
My Marshall MG50FX screeches when im turning any pot (except Master). Master seems...

[Moony]

Hi there,

it would be very nice, if someone could help and give me the schematics of the Marshall DSL5CR (not the DSL5C) and DSL20CR. ...

[cluster]

Hello Everyone,

Just got a used Marshall DSL100H at a great price. Everything works as it should except for this one weird thing: after about...

[jondoe]

Hi all,

I'm in the process of refurbishing a Marshall DSL40c, it had a bad bias resistor which was causing the valves to get quite upset....

[Dylpickle]

Hey Guys,

I'm currently looking at getting my amp (Marshall TSL60) modded and I am trying to understand the gain stages and how they flow through...

[PR Repair]

Hi.

I have a Marshall MB30 demage. Contrary to what is common with technical information about Marshall amplifiers, we can not find the schematic...

[cluster]

Hello all,

Disclaimer: I'm a newb at certain aspects of amp design.

So, I'm in the middle of designing my own Marshall style...