I thought about the standby switch I think it would have to be something else. Steve D would have a better idea as to where to look next. Was the amp working before your mods? You can use a voltmeter to test along the signal path. But you have to know the resistance of each component and see if the...

The forum is under repair. Read Surf's post. As for your amp, how did it sound before the maintenance? From the sound of your video it is hard to tell what it could be. Not familiar with some of your modifications. If it is not tube related then something is creating interference with the signal pa...

Nobody ?

Hi, I did the maintenance on a mid 70's 2203. - 6 filters caps - 2 Bias Caps - Add 1ohm resistor on each power tube socket for bias setting - Changed all the pots - Changed 3 preamp tube sockets - Relocate the 68k directly to the socket tube - Relocate the NFB on 8 Ohms instead of 4 Ohms - Put a shi...

I bought a bunch of parts to test them and keep the result to myself.

Thanks anyway

Interesting I mostly use a Strat. But also use an acoustic with onboard preamp. On occasion an Ibanez with Seymour Duncan humbuckers. My V M is a 2266c. I have never felt the tone to be muddy! Are you using Vintage Modern greenbacks? It seems to me a lot of time and effort to extensively mod the am...

Stratmauler said "Hi there, Not an amp expert by any stretch, but the slight issue I had when I bought my 2266, is that it was too bright. Easily fixed with the amps treble and mid controls, and the guitar tone knob. I thought they were known as bright amps. Maybe check out the amps condition first...

I may be wrong but my understanding is the VM is a modification of the JH 100 circuit which would make it closer to a 1959 than a 2203 circuit. Getting this amp closer to 2203 specs may require some serious re-engineering that may or may not prove successful. The VM is a great amp as is but if you ...

Someone here can help?

Torshalla wrote: ↑

01 May 2022, 13:38

Steve Dawson designed the VM :)
He is a member here, hopefully he sees this thread and responds :)

Oh yeah, sure, it would be awesome if it help me to design a 2203/2203 High Gain ahah

Steve Dawson could give you the right answer i'm sure! Who's Steve Dawson? Treble Channel: Replace R4, 1K5 with 2K7 not 820r Normal Channel: Replace C4, 25uf 35v Replace R6, 820r NFB: Replace R58, 100k Filter Cap: Replace C71/C46/C45/C44, 50uf 500v Ok so at the time I did what I was able to do with...

Ok, So I check all the data that I could. On the Twango mod he put a 820r on R4 (V1a) that is Detail Volume or High I input in Plexi, but on Plexi 820 is on V1a too but it's Low II Input. So I might go with 2K7 instead and put the 820 on V1b with 25uf to cut some mud. JMP 2203 had 50+50uf filter cap...

Hi there, Not an amp expert by any stretch, but the slight issue I had when I bought my 2266, is that it was too bright. Easily fixed with the amps treble and mid controls, and the guitar tone knob. I thought they were known as bright amps. Maybe check out the amps condition first; tubes etc. Then,...

Hi, I bought a VM 2466 in November 21 because I needed an amp, and this one was fairly cheap (I use to make my own amp, but for budget I rather bought this one). Changed the tubes and fix some issues too. It sound good, but too muddy to me, like playing a Stiff Upper Lip album song is impossible bec...