diyAudio - EL84 ECC83 SE Amp schematic Apr 21, 2015Hi I am looking for a schematic For a good El84 ECC83 Amp I have the valves and transformers I intend to use a sold state bridge Rectifier Can any help ? Antique Radio Forums • View topic - NOS EL84 Drawing Too This is something that a decent tube tester may be able to shed light on. Since you did a "full restoration" of the radio, presumably that means that all paper-foil caps were replaced, including the coupling cap between the plate of the first audio amp and the grid of the EL84. Guitar Amp Schematics - AudioTinker Free Guitar Amp schematics in PDF format. 2W Tube Guitar Amplifier, 12AX7 & 12L8GT Single Ended This is a low power Guitar tube amp suitable for practicing, recording or miking through a PA system. ANK Audiokits - L3 EL84 Integrated or Power Amplifier “ ANK Audiokits decided to see how far we could take this wonderful EL84 tube sonically for our extreme enthusiasts! Our external choked Power Supply, large Mains and Triple C-core output transformers results in an integrated or power amplification product of the highest standard.