GE 5751 National 6CG7 Valvo ECC83 Standard Brand I.E.T. 12AZ7 Lectron ECC83 Tesla E83CC Ei ECC82 Paar Valvo ECC82 Sovtek 6SN7GT Tungsram ECC81 Telefunken Telefunken ECC83 Mazda 12AT7 AEG ECC83 Paar Thorens ECC82 Gold Aero 6922 Valvo ECC86 Haltron ECC82 SEL Lorenz Sovtek 6922 CV492 Röhre Philips ECG Philips Ultron ECC82 5814A E82CC EI ECC-88 Paar GE 5751WA Paar Tungsram ECC82 Electro Hoges ECC81 Philips E88CC Valvo PCC88 Westinghouse Siemens ECC83 Telefunken Philips Philips ECG Ediswan ECC81 Valvo PCC189 Telefunken AEG E88CC Philips ECC82 GE 12AX7WA 7025 Philips 12AU7