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Anvil Amps Alan wrote:Interesting tone controls though.
The Marshall Major I believe was actually designed by GEC.

Wasn't it a recommended circuit for their KT88s?

Could do with one for your old H&K Puretone. Trying to figure out why it doesnt break up at any gain level. Most perplexing.

Dharmajester wrote:Could do with one for your old H&K Puretone. Trying to figure out why it doesnt break up at any gain level. Most perplexing.

Really? Clue might be in the name.

Nah, its not right. It was touted as a Trainwreck style clean to mean all from the guitar vol pot type machine and that's what they do in all the youtube vids. This bugger is just plain clean to loud clean. Quite a feat in itself but usable not muchly.

Dharmajester wrote:Nah, its not right. It was touted as a Trainwreck style clean to mean all from the guitar vol pot type machine and that's what they do in all the youtube vids. This bugger is just plain clean to loud clean. Quite a feat in itself but usable not muchly.

Ah. I see. Is it on the way out now he's got the Blankenship?

Yeah, but it's an amp you'd buy for the drive potential not as a super clean machine. I've given it to Danny to sort but schematics are conspicuously absent from the usual providers. I'm also curious to see how it performs when functioning correctly as a couple of the youtube vids sound very promising. Super sparkly fender clean into sustainy gain territory. Wicked with a Strat. We'll get there

Anvil Amps Alan wrote:

Slowy wrote:

Anvil Amps Alan wrote:I am going to build this:

You trying to kill someone?

No, just have a Gunn 200 slave which I will modify and I have another set of transformers.
I might build two killer Bass Amps if the first one goes to plan.

Well I built it, This thing is brutal indeed.

What are the tone controls like ? they looked pretty interesting in the schematic, mixing two differently EQ'd stages into one.

I thought so too. :notafuckingclue:

Anvil Amps Alan wrote:
Well I built it, This thing is brutal indeed.

Really? Well that's a surprise!

So now you have it, what you going to do with it?

Slowy wrote:

Anvil Amps Alan wrote:
Well I built it, This thing is brutal indeed.

Really? Well that's a surprise!

So now you have it, what you going to do with it?

Get some players to trial it, tweak it, cosmetics, flog it.
Then I will scratch build another one in a rack cabinet.
The treble circuit was lame so I modified the (unity gain) buffer in that section to give it sufficient boost.

The cathode follower buffer will be out of phase to the bass circuit which seems a bit counter intuitive to me. Did you just change it to a common cathode stage instead ?

sizzlingbadger wrote:The cathode follower buffer will be out of phase to the bass circuit which seems a bit counter intuitive to me. Did you just change it to a common cathode stage instead ?

Just configured it the same as the bass buffering stage.
Does not sound like it is outa phase, although now you mention it I will use the other channel of my scope to check it out.
I have a mate coming over on Sunday bringing a very large speaker set and his guitars to do some tests.
Luckily my workshop is zoned industrial!

They will be in phase now then, will be a cool jam !

My copy turned up last night, very cool book but it does have a few mistakes in it. The coverage on some non USA amp manufacturers is a bit weak in places but overall a good reference with some amazing guitars included in the photos.