This project describes how to build an amplifier with tubes. The original prototype was designed and built in Forssa / Finland by Juha Makkonen, who allowed us to publish the whole documentation of the project here. Hopefully you find this documentation interesting.

In following downloadable pdf-file you'll find the whole electrical description of the amplifier. Mechanical details are not concerned here, but some nice ideas may be found from the pictures Juha provided us with.

In case of comments and inquiries you may contact us directly.

On behalf of Finnish Robotics Association,

Kari Toivokoski

Download: putki.pdf (9.2Mb)(FIN)