12AX7WA
Siemens ECC88
General
Electron EL-34
Philips ECG
AEG ECC83 Paar
RAM 12AX7 Paar
Tungsram ECH84
AEG EL34
Svetlana 6H13C
JJ Electronic
KR Audio KT88
5814A E82CC
Philips ECG
RSD EL34
Valvo ECH81
Valvo ECC83
GE 12AU7A Paar
Siemens RS 1029
SEL Lorenz
Mazda 12AT7
Valvo PL36
JJ Electronic
Telefunken AZ41
Ei ECC82 Paar
Audio Research
Valvo ECH4
Valvo PCC88
RSD EL84
Orion EL34 6CA7
RSD ECH81
McIntosh KT88
Philips 12AU7
Telefunken
Orion EL34 6CA7
Welter EL34-S
Telefunken
Siemens ECC82
Haltron ECC82
Ultron ECC82
AEG E88CC
Valvo PL84
Telefunken
Philips 12AT7WC
Philips ECC86
ITT Lorenz
Angeschaut