RF UHF Triode / Buffer HIFI Audio Preamplifier, NOS Vacuum Tube 175V 13mA (9-Pins B9A) Noval Pinnacle. Cross Reference: 6DJ8 6DL4 6N1P 6N23P 6922 8255 12AX7 12AT7 12AU7 E88C EE88S.
