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ID = 9843
United States of America (USA)
Brand: Raytheon Mfg. Co.; Cambridge, USA (also tubes)
Tube type:  Beam Power Tube   Audio Frequency 
Identical to CK512AX = 512AX

Base Subminiatur (wire-ends, flat) B5A
Filament Vf 0.625 Volts / If 0.02 Ampere / Direct /

T3x2 flat press subminiature pentode intended for use as audio or DC amplifier in wearable or portable instruments, including hearing aids.
Pinout: 1(red dot)=anode, 2=screen, 3=filament, 4=g1, 5=filament Vf=0.625V, If=20mA. Va max=45V, Vsg=45V. No power limitation, since you can't draw enough current to do anything bad.

Pentode mode: gm=160uS. Triode mode:gm=250uS, Ra=35k, MU=9.

Reasonable amplifier bias points: Pentode: 0.7V bias. Va=22.5V, Vsg=27V, Anode supply=45V. anode resistor=180k. Ia=.12mA, Isg=.06mA. Triode: 0.6V bias. Va+sg=22.5V, Anode supply=45V, load resistor=100k, Ia+sg=.2mA.
The tube 6088 has the same pinout but Vf=1.25V at 20mA and many other differences in operation.

Literature Taschenbuch zum Röhren-Codex 1948/49   
- - Manufacturers Literature   Raytheon, March 1, 1956

  CK512AX: Manufacturer's Literature
Emilio Ciardiello
CK512AX: my collection
Giuseppe Antonio Tusini

CK512AX: Essential Characteristics
Anonymous 15 Collector

CK512AX: Raytheon Manual
Heinz Höger

Usage in Models 1= 1948? ; 1= 1954 ; 2= 1956? ; 1= 1959? ; 1= 1960 ; 1= 1961??

Quantity of Models at with this tube (valve, valves, valvola, valvole, válvula, lampe):7

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