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My toplessDIY preamp

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Poster:	kls (see this users gallery)
Views:	1718
Date:	Tue Apr 24, 2007
Filesize:	40.0k, 93.8k
Dimensions:	1000 x 669
Description:	6 Triode sections (6N3EP) in parallel loaded with 6cl6 pentode C.Current load. Mosfet regulators, suspended amplifer boards. Very good measured performance and sound.
Keywords:	DIY preamp

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Jeff Wong

Registered: Sep 2005
Posts: 999

Fri May 4, 2007 10:18am

That's pretty neat looking. Did you design the circuits and chassis?

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kls

Registered: Apr 2007
Location: Ankara Turkey
Posts: 15

Mon May 7, 2007 3:47am

I have done the complete mechanical and electrical design. The mechanical design was done on autocad in 3D, and circuit design was performed on pspice using custom tube models.
The circuit uses three 6H3NE russian tubes in parallel loaded with 6CL6 pentode current source with extreme linearity without negative feedback up to 45 Vpeak voltage swing. Measured distorsion levels are below 0.05% at 1 Vrms output to 10K load. All supplies are mosfet regulated less then 5mv peak noise at 350V DC.
Currently I am working on a tube phono amp.