Marshall 200 Watt "PIG" Build - diyAudio
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Old 2nd May 2015, 03:20 PM   #1
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Join Date: May 2005
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Default Marshall 200 Watt "PIG" Build

I originally posted this on another forum, but decided to post it here too as I spend most of my time here:

OK,
So here's my attempt at cloning the Marshall 200 "Pig" as per Vintagekiki's schematic.
I still need to label all the knobs and jacks, and I need to build a cabinet to house amp in.
Power output tubes will be either GL KT88s or Chinese EL156s. Main B+ is 650 volts, Screen supply is 360 volts; should be enough for well over 200 watts.
The amp is very quiet with the knobs all turned up; very little hum. I did a good job with the grounds in this amp. The controls take some getting used to, they all interact with each other, when adjusting them. The one thing that I was concerned about was the treble and bass controls; I didn't think they would match up as the treble circuit is a cathode follower which has a gain of less than 1. The bass and treble controls do match up well in this amp.
I have the Chinese EL156 tubes in for the outputs (think of an EL34 on steroids). A word of warning to people buying tubes direct from China... I bought 20 of these tubes and 8 of them are bad, right out of the box. Spend the extra money and buy tubes from a reputable dealer... That's what I get for being cheap...
Many thanks to Vintagekiki for his work on the schematic he provided. I looked at all links he provided for circuit information and I think he did a great job tracing out the schematic onto paper.

If anybody on this board lives in the Los Angeles area, namely, the Hollywood - North Hollywood area of L.A., PM me if you want to give this amp a try to see how it sounds.

PS. Does anyone have outside measurements of the "Pig" cabinet? I'm looking for length X width X height dimensions... Thanks.


EDIT: I tried uploading pictures but got an error saying "security token missing". I sent pics to Admin; hopefully they can add the pics. >>>>FIXED BELOW<<<<

Last edited by danFrank; 27th July 2015 at 04:38 AM.
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Old 3rd May 2015, 12:36 AM   #2
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Default hope ya get ya pics upbe nice to have a look

do you have the cookies turned off in your browser, if so this might be why you can't load pics and posting to the site is good. There's not much worse than going back to a thread (that you knew had an answer you need) only to find all the pics are dead links to photo bucket or sum such.

Sorry for this hijack, just one of my personal peeves.
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Old 3rd May 2015, 02:10 AM   #3
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Let's try again...
Pics:
Attached Images
File Type: jpg PIG2.jpg (90.4 KB, 86 views)
File Type: jpg PIG1.jpg (91.2 KB, 86 views)
File Type: jpg PIG3.jpg (94.0 KB, 84 views)
File Type: jpg 20150501_162803.jpg (86.9 KB, 84 views)
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Old 6th May 2015, 03:39 PM   #4
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I have the History of Marshall book by Michael Doyle and he has a few pics of it in there. There is probably 3" or so between the end of the chassis and the cab, so they must have used the same cab as the model 1959 100 watt amp except they"were slightly larger than the 100 watt heads, 11" vs. 8 1/4" deep to accommodate the transformers" and of course, the small control knob opening. Sorry, that's all I could find. They didn't make many of these a before they evolved in to the Major Model. Not much info to be found it appears.
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Old 6th May 2015, 04:08 PM   #5
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A little off topic but I really like the California Olive Ranch Olive Oil I can see the bottle in one of your pics.

Oh and BTW my herniated disk is screaming just looking at that amp.
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Old 6th May 2015, 05:34 PM   #6
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Quote:
Originally Posted by boobtube View Post
I have the History of Marshall book by Michael Doyle and he has a few pics of it in there. There is probably 3" or so between the end of the chassis and the cab, so they must have used the same cab as the model 1959 100 watt amp except they"were slightly larger than the 100 watt heads, 11" vs. 8 1/4" deep to accommodate the transformers" and of course, the small control knob opening. Sorry, that's all I could find. They didn't make many of these a before they evolved in to the Major Model. Not much info to be found it appears.
Hi, I found the cabinet dimensions after a google search. It's 29"W X 10.875"H X 11"D. Same as the Marshall Major; only difference is the cutout on the front panel is smaller in the "PIG" amps. And, yes, you are correct... Cabinet is basically the same size as the 100 watt Super Lead but about 3" deeper.

Thanks for looking this up in your Book.

The chassis I used is Stainless Steel, Somebody gave me three of them years ago and luckily I didn't throw them out. SS is a pain to work with as it's much harder than mild steel but I think the end result is pretty good.
My Chassis is much taller than a Marshall chassis but once the amp is in a cabinet, the difference won't be noticeable.

Last edited by danFrank; 6th May 2015 at 05:41 PM.
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