Siemens ECC83 Philips 12AT7WC Raytheon JJ Electronic Siemens E83CC Siemens E88CC Valvo ECC86 Telefunken Electro Telefunken Ultron ECC82 6N8P Röhren Gold Aero 6922 Siemens ECC88 RCA 6SL7GT AEG ECC83 I.E.T. 12AZ7 Tungsram ECC82 Siemens ECC82 National 6CG7 EI ECC-88 Paar Valvo ECC85 AEG ECC83 Paar Valvo ECC83 Mullard E88CC National 6922 Telefunken ECC83 GE 12AX7WA 7025 Golden Dragon National 6922 5814A E82CC E88CC Röhren National 12AX7A Philips E88CC Ei 12AT7 Paar Valvo ECC83 12AX7 China Sovtek 12AX7WC PrimaLuna 12AU7 Siemens ECC83 Standard Brand Philips Lectron ECC83 Philips ECC86 Philips