Marshall Major Schematics

In 1967 Marshall introduced the Marshall 200 amps. These amps only had 3 knobs: Treble, Bass and Volume. This early Marshall 200 was also known as “the Pig”. In the course of 1968 the Low-High tone control circuitry was changed to a Low-Mid-High tone control and these amps were now called the Marshall Majors.

Using four KT88 power tubes, these amps were very powerfull, obnoxiously loud and very expensive. They were in production up to 1974. An ECC82 was used as the driver tube for the four KT88s.

Marshall 200 Amp, 200W head

Photograph of a rare Marshall 200 head a.k.a. the “Pig” from 1967 (thanx to and courtesy of Jacques of www.TS808.com).

Marshall Major Amp, 200W head

Generic 200W Amp schematic with 2x ECC83, 1x ECC82 & 4x KT88 (Marshall, 1968).

Major 1966 PA, 200W head

This amp had 4 channels and 8 inputs. The 1976 PA Columns were designed to be used in pairs with this 1966 Major PA amp.

Schematic with 3x ECC83, 1x ECC82 & 4x KT88 (Marshall, 1970).

Schematic with 3x ECC83, 1x ECC82 & 4x KT88, 70-04-12 (Unicord, 1970).

Photograph of a red Marshall 1966 PA head (thanx to Jesse Petas).

Major 1967 Lead, 200W head

Schematic with 2x ECC83, 1x ECC82 & 4x KT88, 70-02-12 (Unicord, 1970).

Major 1978 Bass, 200W head

Schematic with 2x ECC83, 1x ECC82 & 4x KT88, 70-05-12 (Unicord, 1970).

1976 PA Column, 4×12″ 100W PA cabinet

The 1976 PA Columns were designed to be used in pairs with the 1966 Major PA amp.

See the Marshall Arts Major page for more information on these Marshall Majors.