Cornford MK50II rebuild

Tube or solid-state, this section goes to eleven!
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lhd3000
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Post by lhd3000 »

I build the MK50 II last year. The Amp is working fine.

Some people asked me for the layout and the verification fot it, but I'm the only one who build the monster yet. So I'm looking for some volunteers to check my layout.

Cheers, lhd3000
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Cornford MK50H II Schematic V2_smallversion.jpg
Cornford MK50H II Layout Ready to Build V5.0.pdf
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brejna
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Post by brejna »

Awesome project! Could you share few photos of your build with us?

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okgb
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Post by okgb »

The phase invertor looks like it has a cap going from plate to plate [ seems purposeful , is that correct ? ]
I haven't looked heard at it [ or heard a real Cornford in person ] looks to be a fender clean and marshall like o/d ?
can you describe how it sounds? sort of ? thanks

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lhd3000
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Post by lhd3000 »

The cap between the plates is completely correct.
As you have already said, the clean channel sounds more like a fender, the OD channel is more soldano, but with a good bassrange, also endless sustain.
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AAntonio
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Post by AAntonio »

very nice!!! :applause:

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AAntonio
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Post by AAntonio »

Hello
I do not understand where they go connected fsred fs orange etc.
thank you so much

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lhd3000
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Post by lhd3000 »

fs = footswitch

they're going to a 5 pole soocket (midi socket) http://www.musikding.de/bilder/produkte ... -polig.jpg

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AAntonio
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Post by AAntonio »

lhd3000 wrote:fs = footswitch

they're going to a 5 pole soocket (midi socket) http://www.musikding.de/bilder/produkte ... -polig.jpg

many thanks :wink:

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Zozobra
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Post by Zozobra »

okgb wrote:The phase invertor looks like it has a cap going from plate to plate [ seems purposeful , is that correct ? ]
I haven't looked heard at it [ or heard a real Cornford in person ] looks to be a fender clean and marshall like o/d ?
can you describe how it sounds? sort of ? thanks

The cap in the pi is to stabilise the NFB loop. There are better ways to do it but this is the most common and it's found in nearly all Marshall inspired circuits.

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brejna
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Post by brejna »

Is there any info about transformers?

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lhd3000
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Post by lhd3000 »

PT
W1 -> 320V / 270mA
W2-> 50V / 50mA
W3-> 6,3V / 6A w. CT
W4 -> 12V / 2A w. CT

It's custom build, payed s. about 100 €.

OT
http://www.tube-town.net/ttstore/Transf ... :5994.html

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