push pull valve amplifier, using only 1 valve and 10 components .

As usual there are a few little mistakes in the video !
Demonstration of a push pull amplifier using only 1 valve instead of a minimum of 3 , obviously to get 8.5 watts out of this valve you will need another valve acting as an input pre amplifier but for lower output this amplifier can be driven straight from a mobile phone with no pre amp stage .