Shuguang 300B S AEG ECC83 Paar Gold Aero 6922 Philips ECG Audio Research Siemens ECC82 Telefunken EL84 Welter EL34-S Electron EL-34 National 6922 Valvo PCC88 Philips ECG Orion EL34 6CA7 Svetlana 6H13C ECC82 Röhre Valvo ECC83 Valvo ECC81 GE 6550 A Telefunken General RSD EL84 Siemens RS 1029 Electro National 6922 Philips E88CC AEG EL34 Electro Telefunken RSD EL34 Orion EL34 6CA7 General RFT EL34 Siemens EL84 Sovtek 6550 WA Philips Valvo AZ1 Philips 6CG7 E88CC Röhren Ultron ECC82 Hoges EL12 375 Fullmusic 300B The Fisher 7189 Telefunken KR Audio KT88 EAT 300B Röhren Siemens ECC83