Marshall JCM900 4100 w/5881’s volume drop

[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...

[blindboybenton]

Hello

I have a customer who wants me to mod his JCM900
His words below
"The issue that I would like fixed is an eq problem ......

[markammon1979]

Hi, I know there has been loads of threads about modding JCM 900's but I just wanted to ask a quick few questions. I wanted to find out about modding my mid...

[hadley101]

Just picked up JCM 900 2100 SLX with 5881,
unfortunately it came with Tung Sol 5881 and
they couldn't cope with plate voltage.
...

[sibo]

Hey guys,

I had this JCM 900 Hi Gain Dual Reverb combo that I used frequently before. Eventually I put it in the garage where it stood unused...

[norby3]

Hi Folks.

I'm getting a pop sound from my amp. The V7 LED lit up, fuse blown. I looked inside the chassis and the 1.5K that goes from pin 4...

[mastersamo]

I'm building AX84 Power Amp :http://www.ax84.com/static/corepower..._Schematic.pdf
clean channel preamp : http://www....

[Tiago]

Hello,
I'm just about to replace the power transformer on a JCM 900 that is blowing fuses.
It's a 100 watt Model (4102).
Can someone...

[misterc57]

Just bought JCM900 Dual Reverb 100 watt head a couple days ago.

After playing for a while, the volume drops, sometimes fades to nothing, eventually...

[GunalORSEL]

Dear Friends,

I am an owner of a Marshall JCM900 100W Dual Reverb Combo (Model #: 4102) which I bought new in 1992. Now, after 16 years of...