6DJ8 Röhren Philips ECG GE 12BH7A Valvo PCC88 Philips AEG E88CC Valvo ECC83 Gold Aero 6922 GE 12AU7A Paar Philips ECG Standard Brand Philips 12AT7WC National 6922 Valvo ECC85 6N9P Röhren Philips ECG RCA 6SL7GT Amperex 6DJ8 ECC83 Haltron ECC82 Telefunken Valvo PCC189 Lectron ECC83 I.E.T. 12AZ7 GE 12AX7WA 7025 Philips SEL Lorenz Electro Telefunken Siemens E83CC ITT Lorenz Siemens ECC82 National 6922 Telefunken E88CC Röhren JJ Electronics Ei ECC82 Paar Philips ECC82 Tesla E83CC Siemens ECC83 5814A E82CC Philips PrimaLuna 12AU7 Valvo ECC83 Telefunken Sovtek 6SN7GT