Tiny audio power amplifier

A project log for Vacuum tube game in 21st century

Playing vacuum tube is not so difficult as expected. Let's play great heritage of human being by modern technology!

kodera2tkodera2t 07/20/2019 at 05:330 Comments

Recently I tackled with bigger tubes but now I have a quick return to sub-miniature tube.

It is quite simple amplifier by 5672 with output transformer (for transistor). It still requires 30V so I power-on with my previous making (3.7V to heater, B voltage generator board). Actual operation can be found in the following movie. Have fun!