Pentode
The Mullard 311B Vacuum tube is used for Radio and TV
reception and was first developed in Bell Telephone
Laboratories. The 311B is a suppressor grid power
pentode having an indirectly heated cathode. It is
designed for use as an audio, carrier or radio-frequency
amplifier.
For optimum tube life, a heater voltage of nine volts is
recommended. However, when nine volts is used, it must be
regulated to within, plus or minus 1%.
The 311B
tube uses a 5 pin socket.
Electrical Data:
Heater Voltage ................................... 10 V
Heater Current ................................. 0.64 A