6418 Tube

These tubes are new old stock manufactured by Raytheon with a date code of 1983. Each tube is individually boxed. The 6418 is a subminiature wire leaded Pentode power amplifier. The filament voltage is 1.25VDC at 10 mA, and B+ is spec. at 22.5 VDC. Gm = 300 uMhos, plate resistance = 420K.