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CCa

Sensibly equivalent to:
6922 E88CC
    
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The CCa is a miniature double triode with an inter valve screen. The Siemens catalogue lists the applications that this high mutual conductance valve is suited to as:- A low noise universal twin triode for cascode, mixer and phase inverter stages, multivibrator and cathode coupled amplifiers.
For class A amplifier service the typical operating conditions would be an anode voltage of 220V and anode current of 9.2 mA. The load resistance would be 20 k Ohms.
Thanks to Kajetan Rozycki for the data from the Siemens 1962-3 catalogue.
The thin glass tube envelope is 19 mm in diameter and, excluding the B9A base pins, is 48 mm tall.
References: Datasheet & Kajetan Rozycki. Type CCa was first introduced in 1958.

 

Pin Connections
B9A
1
2
3
4
5
6
7
8
9
a(2)
g1(2)
k(2)
h
h
a(1)
g1(1)
k(1)
s

 

Absolute Maximum Operating Conditions
Triode
Vh
Ah
Va
Vg
mAa
ra
gm
6.3
0.3
220
-1
15.0
20k
12.5
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated February 22, 2013.
shape:thin.glass.tube construction:all.glass type:double.triode age:1960.1975 base:b9a heater:6.3v pins:9 pin:1.a(2) pin:2.g1(2) pin:3.k(2) pin:4.h pin:5.h pin:6.a(1) pin:7.g1(1) pin:8.k(1) pin:9.s
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