Study ValveAmplifier D.I.Y but in Spanishgood for you.old Argentina book.
Single Ender EuropaEDERER EDERER Amplifiers
Vintage circuit from UK about Old Europian Radio'sCircuits
Main Site of VintageRadio and Electronics
By Google translate
How about use for sound source from Raspberry Pi B+ This is not toy..High End Audio
Only in JapaneseRadio Boy
Where can you buy EL3N NOS from Europa also can buy Japanese Transformer and components
since 21st May 2011.last up date on 7th Sep 2024 from Yachiyo Chiba Japan
If would like to know more ?
Single Ended Amplifier D.I.Y
Marlhori Audio 2003-2024