The electron vacuum tube is a marvelous device. It makes possible the performing of operations with precision and amazing in conception, like in the vacuum tube audio amplifiers.
I believe that this web site is the most practical way to introduce a number of tube amps DIY audio applications for those who not only like to construct but listen to music as well.

Knock, knock, knockin' on heaven's door..
Knock, knock, knockin' on heaven's door..

Lyrics by Bob Dylan

My relationship with DIY tube amp design and DIY audio spans more than three decades .My relationship first started with music and "pirate" radio, then I got a taste of constructing transmitters there in the decade of 80s, "all these together and simultaneously," as my dear Savopoulos says pushed me one evening .. and I decided to start designing ... DIY Costas!

So somewhere around early 1995 I had to build my first pair of Push Pull 6550 tube amps , I visited the laboratory of my friend Giannis Spathopoulos. Everything apart from circuit was under the chassis!

Giannis had left the tube amps building some time ago ... after studying abroad ...
He said, “We will build it and it will play fabulously!”

Of course, Giannis helped too. Without his help there would not be all these tube amp DIY projects presented at this site.
Special thanks to my good friend Giannis Spathopoulos!

costas sarris