Tetrode
The 6N1N / 6P1P Vacuum tube is a
Soviet-made miniature 9-pin beam tetrode vacuum tube with
ratings similar to the 6AQ5, EL90 and the 6V6. Because of
a different pinout (a 9-pin base versus 7-pin base) than
an 6AQ5/EL90, it cannot be used as a plug-in replacement
for these types, however, it will work in the same
circuit with component values unchanged. Its maximum
plate/screen voltage and dissipation ratings are
actually slightly higher than a 6AQ5. A
ruggedized/extended ratings version of the tube is
designated 6P1P-EV (Russian: 6Ï1Ï-ÅÂ) roughly equivalent
to the 6AQ5W. A Chinese-manufactured version of the tube
also exists, labeled 6P1.
The type was commonly used in Soviet-built vacuum tube
radios and TV sets as an output audio amplifier, until it
was replaced by the higher-performance 6P14P (EL84) tube.
It was also used in output stages of low frequency
amplifiers.
Electrical Data:
Heater Voltage ................. 6.3 V
Heater Current ................. 460 to 525 mA
Preferred Substitute.......... 6N1N, 6P1, 6P1P - EV
............................ 6AQ5, EL90