Ultron ECC82 AEG ECC83 Paar E88CC Röhren Valvo ECC83 National 6922 Electro Electro JJ Electronics Valvo ECC81 AEG ECC83 Telefunken Tesla E83CC Amperex 6DJ8 Standard Brand Siemens E88CC Siemens E83CC Philips Ei ECC83 Ei 12AT7 Paar National 12AU7 Siemens ECC85 AEG E88CC Philips 12AT7WC Philips 6N9P Röhren Telefunken Golden Dragon Sovtek 12AX7WC Telefunken Electro Philips ECC86 Raytheon 12AZ7A 5814A E82CC Siemens ECC83 Valvo ECC83 Philips ECC82 Siemens ECC83 Gold Aero 6922 Sovtek 6SN7GT Lectron ECC83 National 12AX7A SEL Lorenz Valvo PCC88 I.E.T. 12AZ7 Raytheon 12AZ7A 6N8P Röhren