Anybody need a schematic?

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Slowy
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Re: Anybody need a schematic?

Post by Slowy »

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?
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Re: Anybody need a schematic?

Post by Dharmajester »

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.
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Re: Anybody need a schematic?

Post by Molly »

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. ;-)

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Re: Anybody need a schematic?

Post by Dharmajester »

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.
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Re: Anybody need a schematic?

Post by Molly »

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?

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Re: Anybody need a schematic?

Post by Dharmajester »

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 :)
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Re: Anybody need a schematic?

Post by Anvil Amps Alan »

Anvil Amps Alan wrote:
Slowy wrote:
Anvil Amps Alan wrote:I am going to build this:
:wtf: 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.
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Re: Anybody need a schematic?

Post by sizzlingbadger »

What are the tone controls like ? they looked pretty interesting in the schematic, mixing two differently EQ'd stages into one.
Tube amp and guitar tones straight from 1958… amazing how believable the sounds were back then, even without the modellers...

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Re: Anybody need a schematic?

Post by Molly »

I thought so too. :notafuckingclue:

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Re: Anybody need a schematic?

Post by Slowy »

Anvil Amps Alan wrote:
Well I built it, This thing is brutal indeed.
Really? Well that's a surprise! :rofl:

So now you have it, what you going to do with it?
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Re: Anybody need a schematic?

Post by Anvil Amps Alan »

Slowy wrote:
Anvil Amps Alan wrote:
Well I built it, This thing is brutal indeed.
Really? Well that's a surprise! :rofl:

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.
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Re: Anybody need a schematic?

Post by sizzlingbadger »

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 ?
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Re: Anybody need a schematic?

Post by Anvil Amps Alan »

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!
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Re: Anybody need a schematic?

Post by sizzlingbadger »

They will be in phase now then, will be a cool jam !
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Re: Anybody need a schematic?

Post by sizzlingbadger »

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.
Tube amp and guitar tones straight from 1958… amazing how believable the sounds were back then, even without the modellers...

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