ECC 813, Tube ECC813; Röhre ECC 813 ID3996, Double Triode | Radiomuseum.org
Power required to drive an 813 in grounded grid linear?
813 SE triode amps
813 Thoughts | diyAudio
813 SE triode amps
900v. 100ma. Power supply for 813 tube amplifier | diyAudio
813 / GM70 amplifier with Bartolucci transformers
old 813 homebrew Amp
813 Beam Power Tube and Data Sheets
813 Beam Power Tube and Data Sheets
807 (vacuum tube) - Wikipedia
An 813 Amplifier
813 Beam Power Tube and Data Sheets
Schematics 813 SE Amp Richards Ellis | diyAudio
Shuguang Vacuum Tube 813 For Tube Amplifier Replace FU13 High Power – IWISTAO HIFI MINIMART
813 Pentode | TUBES.RS | Tube Amplifiers & NOS Tubes
SM5CBW - Tubedata
813 @ The Valve Museum
813 SE triode amps
813 Linear Amplifier | G4AKE
813 Linear Amplifier | G4AKE
813, Tube 813; Röhre 813 ID11886, Beam Power Tube | Radiomuseum.org
813 Linear Amplifier | G4AKE
813 Linear Amplifier Project – W4NPN
