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Topics - Gabriel

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Schematics and Layouts / Randall X2 preamp.
« on: November 23, 2011, 10:31:12 AM »
This is my interpretation of the Randall X2 schematic.
It's not tested yet, but i hope get start my prototypes in a couple of months.

I choose to make modular sections because it was more easy to me and if you wish you could make just one of the preamps or just the tonestack. Channel selection was sugested in another post.

I also hope you enjoy. :cheesy:

Any doubts, critics, impruvements, sugestions etc are very welcome.

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Preamps and Effects / Randall Warhead
« on: June 21, 2011, 01:57:51 PM »
Based on the official schematcs that we can find on the web a friend of mine did a new schem, simplifing the Warhead.

Idid not like the french version of the X2 head just with fets. It sounds allright, to me, but not quite good as the real one.

There are, now, only the input stage, a switch channel stage, OD stage (With the "FRY" stuff - a boost using FEt)/Clean stage and a fine tonestack (half active - half passive).

I'm not sure if he finished the project, because we lost contact with each other.

But, doing a comparison between the two schemes, i can see diferences with the supply power. I'm not sure, either, if it must run with 18v bipolar or the regular 9 v.

Can anyone help me check  this schem?

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Preamps and Effects / 5150 fet french stuff
« on: January 14, 2011, 06:59:02 AM »
Hey people,

I find some 5150 peavey clone with fets, by a french dude:

http://www.fichier-pdf.fr/2010/04/13/08zhzj8/PDF%205150%20-%20V1.31.pdf

Is it any good? What are your opinion about this stuff?

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