Lundahl Transformers - 30W PP amplifier designed by Claus Byrith

30W Push Pull amplifier designed by Claus Byrith, Royal Academy of Music in Aarhus, Denmark.

Claus Byrith is the head of the studio at the Royal Academy of Music in Aarhus. He has a life-long experience from different sound recording and reproduction equipment.
In 1998 (or was it 1999) we asked Claus Byrith, as a return favour for some special made tranformers, for an easy-to-build tube amp schematic. It did take some time for Claus to fulfill his promise, but on the other hand he not only gave us a schematic, but a complete building instruction of a 30W push-pull amplifier, including a comprehensive theory section which discusses different tube amplifier design issues.
(Claus Byrith can be contacted directly through email address cb@musik-kons.dk)

The instruction is separated in two parts:
Building instruction (pdf file, 284k)
and

Appendix (pdf file, 854k)
with tube data sheets and some classic amplifier schematics with comments. The appendix also includes performance curves, PCBs and layout suggestions for the above amplifier (pdf file, 854k).

Transformers used in the above amplifier:
Output transformer LL1663

Mains transformer LL1669A

Per Lundahl, web_master/AT/lundahl/DOT/se
Lundahl Transformers AB
Tibeliusgatan 7
SE-761 50 Norrtälje
SWEDEN
Phone: +46 - 176 139 30
Fax: +46 - 176 139 35
Email: office/AT/lundahl/DOT/se