One thing you have to watch with a tube amp is the power section.
A tube/transformer power section produces a different tone than
a solid-state rectified setup. A tube rectifier such as a 5y3 or 5y4
makes for a richer tone. If you use diodes they are too efficient and
the power is too regulated. The tube rectifier lags and droops and actually
adds a bunch to the final result. A lot of the newer tube amps have gone
to some form of solid-state rectifiers as its cheap/easy to do but they seem
pale
sound wise if you put them up next to the tube rectified models.

Dave

-----Original Message-----
From: piclist-bounces@mit.edu [mailto:piclist-bounces@mit.edu]On Behalf
Of Jinx
Sent: December 19, 2006 6:21 PM
To: Microcontroller discussion list - Public.
Subject: Re: [OT] Buikding a tube-based guitar amp


> It sounds like 15-20 watts might do the trick. I need to be able to get
> enough clean volume; I'm not so worried about the distortion

Silicon Chip did a series on valve amps. If you want I can send
you schematics. I've not built them personally but they did get
very good reviews

Pre-amp

http://www.siliconchip.com.au/cms/A_30804/article.html

20W + 20W stereo

http://www.siliconchip.com.au/cms/A_105000/article.html

How to make an HT supply from an old PC PSU

http://www.siliconchip.com.au/cms/A_102096/article.html

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