{"id":1576,"date":"2013-05-18T19:43:38","date_gmt":"2013-05-18T18:43:38","guid":{"rendered":"http:\/\/www.bartola.co.uk\/valves\/?p=1576"},"modified":"2013-05-18T19:43:38","modified_gmt":"2013-05-18T18:43:38","slug":"4p1l-push-pull-amplifier","status":"publish","type":"post","link":"https:\/\/www.bartola.co.uk\/valves\/2013\/05\/18\/4p1l-push-pull-amplifier\/","title":{"rendered":"4P1L Push-pull Amplifier"},"content":{"rendered":"

Shiny Eyes by Radu C. Tarta<\/h1>\n

This is a fantastic 4P1L push pull\u00a0incarnation\u00a0done by Radu. I hope you enjoy reading this post as much as I did. Cheers, Ale<\/p><\/blockquote>\n

Introduction<\/h2>\n

“Shiny Eyes” Push-Pull tube amplifier is the result of 6 months of research, experimentation and lots of music listening. It started in the summer of 2012 when life opportunity re-opened the door of an old passion: electron tubes. However, this time my goals were directed towards audio. I understood from the beginning that after 30 years of interruption I have to dedicate a great amount of time and energy to catch up with technology and ideas. I want to thank my wife Paula for her emotional support and understanding. I am also grateful to the fanatics from the DIYaudio community for their contribution to the world of tube audio experimentation. Personal thanks to Kevin Carter of K&K Audio for his advises and help, to Ale Moglia of Bartola Valves for his inspiring work and to Rod Coleman for his excellent filament regulators.<\/p>\n

Initial tests<\/h2>\n

\"radu1\"<\/a>Here are few images taken during design, experimentation and final building: Early stages…<\/p>\n

\"radu2\"<\/a>
Initial breadboard<\/figcaption><\/figure>\n
\"radu3\"<\/a>
Layout design stage<\/figcaption><\/figure>\n

<\/p>\n

\"Here <\/a>
Here is the top plate CNC-ed at high quality by ProtoPanel <\/div> <\/div> <\/div>
\"Earth <\/a>
Earth bond <\/div> <\/div> <\/div>
\"Loctal <\/a>
Loctal sockets for the 4P1L <\/div> <\/div> <\/div> <\/div>
\"Wiring <\/a>
Wiring the amp <\/div> <\/div> <\/div>
\"Testing\" <\/a>
Testing <\/div> <\/div> <\/div>
\"Finished <\/a>
Finished amp without transformer covers <\/div> <\/div> <\/div> <\/div> <\/div>\n

Final build and design notes<\/h2>\n

Design goals:<\/p>\n