Marshall "mini" major Build questions

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fusionbear
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Marshall "mini" major Build questions

Post by fusionbear » Mon Sep 26, 2016 9:25 pm

Hello all someone asked me to build a "mini" major with 2 KT88's, but I am having trouble sourcing a schematic that is fully legible. Anyone have a clear one. My main questions are regarding the V2b cathode resistor values and the Bias feed resistor values, 82k?

Lastly, I was asked to install a PPIMV. It seems the "rich II" style seems like the best option. Any thoughts, advice?

I plan to use a JTM 45/100 PT to get 560+ on the plates. I will use a 100 watt OT with 40% taps for the ultra-linear connections.

Thanks!

:rocker:
Amps: diy SLO, Splawn QR, YBA-1
Cabs: Scumback, Rockit, Deizel
Speakers: Scumback M75, Cel. V30, wgs hm75
Guitars: Suhr, B.C. Rich

Roe
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Re: Marshall "mini" major Build questions

Post by Roe » Tue Sep 27, 2016 5:17 am

http://www.myspace.com/20bonesband" onclick="window.open(this.href);return false;
http://www.myspace.com/prostitutes" onclick="window.open(this.href);return false;
Super 100 amps: 1202-119 & 1202-84
JTM45 RS OT JTM50 JMP50 1959/2203/34/39

fusionbear
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Re: Marshall "mini" major Build questions

Post by fusionbear » Thu Oct 06, 2016 9:15 am

Here is the build:

Image

Image

Image

Image
Amps: diy SLO, Splawn QR, YBA-1
Cabs: Scumback, Rockit, Deizel
Speakers: Scumback M75, Cel. V30, wgs hm75
Guitars: Suhr, B.C. Rich

fusionbear
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Posts: 94
Joined: Sun Dec 27, 2009 9:29 pm
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Location: Southern California

Re: Marshall "mini" major Build questions

Post by fusionbear » Fri Oct 07, 2016 1:37 am

More progress:


Image

Image
Amps: diy SLO, Splawn QR, YBA-1
Cabs: Scumback, Rockit, Deizel
Speakers: Scumback M75, Cel. V30, wgs hm75
Guitars: Suhr, B.C. Rich

Roe
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Posts: 5054
Joined: Thu Apr 13, 2006 1:36 pm
Just the numbers in order: 7
Location: Drontheim. Norwegen
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Re: Marshall "mini" major Build questions

Post by Roe » Fri Oct 07, 2016 2:59 am

Beatiful! (although I don't like the sound of metal oxide resistors, even in the power supply)
http://www.myspace.com/20bonesband" onclick="window.open(this.href);return false;
http://www.myspace.com/prostitutes" onclick="window.open(this.href);return false;
Super 100 amps: 1202-119 & 1202-84
JTM45 RS OT JTM50 JMP50 1959/2203/34/39

fusionbear
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Posts: 94
Joined: Sun Dec 27, 2009 9:29 pm
Just the numbers in order: 7
Location: Southern California

Re: Marshall "mini" major Build questions

Post by fusionbear » Mon Oct 10, 2016 6:17 pm

Amps: diy SLO, Splawn QR, YBA-1
Cabs: Scumback, Rockit, Deizel
Speakers: Scumback M75, Cel. V30, wgs hm75
Guitars: Suhr, B.C. Rich

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wdelaney72
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Location: Chicago Suburbs

Re: Marshall "mini" major Build questions

Post by wdelaney72 » Tue Nov 01, 2016 11:10 am

Cheers!
That is a great sounding amp!
Walter

"There's no great thing in being a soloist. I think the hardest thing is to play together with a lot of people, and do it right." - Angus Young, 1984

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thetasigma
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Re: Marshall "mini" major Build questions

Post by thetasigma » Fri Apr 28, 2017 1:45 pm

Just curious what brand and spec transformers you went with? Amp looks and sounds awesome.
-Nathan

"Eagles may soar, but weasels don't get sucked into jet engines."

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