Wish Marshall Major

+1

And while at it, please consider adding the JTM45/100 (any model, dual transformer, single transformer, any output tube type) ass well. I still don't believe those haven't been implemented yet after all these years...
 
+1

Piing said:
What would be the existing amp closer to the 200W Marshall Major?

Click to expand...

Its preamp/PI/output circuit is a bit different than a standard Marshall, IIRC.

Will have to find a schematic and look it over again. The outputs are KT88, which are "Kinkless Tetrodes" (aka beam power tetrodes), like 6L6, 6V6, 6CA7, etc. That alone will make them perform differently to EL34s....

EDIT:
1967u.gif
Looks like the 12AX7 stage that would normally be used as the direct-coupled cathode follower to drive the tone stack is instead a cathodyne phase splitter after the stack. The usual PI tube is instead a 12AU7 set up as a pair of triode drivers driven by the cathodyne's outputs, to drive the output grids with a lower impedance, to be able drive the output tubes a bit harder. The negative feedback loop comes in at the cathode of the stage that drives the tone stack instead of the tail of the PI.

Not sure how you could adjust a standard Marshall model to accommodate all of that, beyond switching to KT88 (along with appropriate other settjns changes on that tab) and turning off cathode follower compression, which is only part of the changes involved. The lack of cathode follower will likely affect tone stack response, taking off some treble response, in addition to eliminating the compression effects it imparts.
 
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"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, very loud and very expensive. They were in production up to 1974. An ECC82 was used as the driver tube for the four KT88's."

https://drtube.com/en/library/schematics/69-marshall-schemas
 
Blackmore has said more than once that he preferred a Vox in the studio... So unless you're after a his live tone, you're chasing the wrong rabbit ;)

Also, as @Jan Geerts mentioned above, he was (at least at one point) using a Vox amp disguised as a Marshall. There's a pic I've seen a few times showing that (and pretty sure Ritchie has also mentioned it).
 
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