Voltage amplifier tetrode
The CK510AX Vacuum tube, also known as a CK510, 510 and
510AX, is a voltage amplifier tetrode used for battery
operated wearable or portable sets. It was designed as a
special dual tetrode for cascade voltage amplification in
hearing aid applications.
This special design shares the single filamentary cathode
to save battery power.
Electrical Data:
Heater Voltage ........................ 0.625 Volts
Heater Current .........................0.06 Ampere
Gain over 150 cascading both sections.
It has a 7 pin flat subminiature base.
Pin 1 grid #1
Pin 2 plate #1
Pin 3 space-charge grid
Pin 4 filament +
Pin 5 plate #2
Pin 6 grid #2
Pin 7 filament
For a lot more information click the link below.
CK510AX
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