Valvo ECC83 Telefunken EL84 Golden Dragon Ultron ECC82 Telefunken Svetlana 6H13C GE 6550 A Valvo AZ1 RSD EL84 Philips ECG National 6922 Welter 6550 A-S Welter EL34-S Fullmusic 300B Telefunken Hoges EL12 375 RCA 2A3 Golden Dragon Ruby Tubes KT88 KR Audio KT88 Valvo PL36 Valvo ECC81 Gold Aero 6922 AEG EL34 Philips E88CC Philips ECG Telefunken Electron EL-34 RSD EL34 National 6922 Siemens ECC82 Mazda 12AT7 Shuguang 300B S ECC82 Röhre Audio Research The Fisher 7189 Audio Research E88CC Röhren Philips ECG Orion EL34 6CA7 Telefunken Golden Dragon McIntosh KT88 Orion EL34 6CA7 Valvo PCC189 General