Svetlana 6H13C Hoges EL12 375 Orion EL34 6CA7 Welter EL34-S Svetlana KT88 GE 6550 A Shu Guang Electro Telefunken EL84 Ruby Tubes Audio Research Svetlana 6550 C Tung-Sol EL34 B RFT EL34 Shuguang 300B S McIntosh KT88 AEG EL34 Svetlana 6550 C Edicron EL84 6550 Röhre RSD EL84 The Fisher 7189 Fullmusic 300B Siemens EL84 Valvo PL36 Electro Tesla E34 L Welter EL34 Sovtek 6550 WA Electron EL-34 Orion EL34 6CA7 GEC KT66 RCA 2A3 Golden Dragon Philips ECG General Electron EL-34 EAT 300B Röhren RSD EL34 KR Audio KT88 Sovtek KT88 Welter 6550 A-S Philips ECG Audio Research Valvo EL84 Ruby Tubes EL84