Hoffman Amplifiers Tube Amplifier Forum

Amp Stuff => Tube Amp Building - Tweaks - Repairs => Topic started by: dennyg on November 25, 2017, 09:45:59 am

Title: Plexi + JCM800 2 channel
Post by: dennyg on November 25, 2017, 09:45:59 am

I'd like to build a 2 channel 50W with my 2 favorite marshalls.  The 3rd/4th stages appear nearly identical - stage 3 on a plexi with an 820R Rk vs 1K Rk on an 800, both feeding a 100K Rk CF into TMB tone stack.  I'd build Doug's plexi design for blending the first 2 stages, and the first 2 stages of the 800 2204, switching between them into stage 3. 
I'd use a standard MV into fixed-bias 50W PP w/6L6's. 
I'd think this has been done a lot. 
Am I missing anything, or any suggested tips/mods?

Title: Re: Plexi + JCM800 2 channel
Post by: sluckey on November 25, 2017, 10:11:18 am

Something like this?

     http://sluckeyamps.com/misc/_Marshall_Dual_50.pdf

Title: Re: Plexi + JCM800 2 channel
Post by: dennyg on November 25, 2017, 10:23:28 am

LOL - YES!!! Thanks so much - now I can get to ordering the parts. 
I see there's a board layout available but I like doing my own term strip layouts using g-ring, and will post that layout when I'm done for anyone else who might be interested in that approach.  Worked out great for my TOS. 

Title: Re: Plexi + JCM800 2 channel
Post by: sluckey on November 25, 2017, 10:30:40 am

I look forward to following your project.