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C3m

Sensibly equivalent to:
TS49
See also:
Siemens C3m Box
    
Extras ▼

 

The C3m is a general purpose pentode with a 125 mA heater requirement for series heater chains. The construction is all glass with a built-in aluminium screening can.
The serial number Nr. 1820241.
The maker and Type on the top of the black painted screening can.
The C3m out of the screening can. Image courtesy of DiyAudio.
The wide glass tube envelope is 32 mm in diameter, and excluding the B8B base pins is 53 mm tall.
References: Datasheet. Type C3m was first introduced in 1953.

 

Pin Connections
B8B
1
2
3
4
5
6
7
8
h
a
g3
g2
-
g1
k,s
h

 

Absolute Maximum Operating Conditions
Pentode
Vh
Ah
Va
Vs
Vg
mAa
mAs
gm
μ
20.0
0.125
220
150
-14
16.0
3.0
4.7
250
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated January 15, 2018.
shape:wide.glass.tube construction:all.glass type:pentode age:1950.1960 base:b8b pins:8 pin:1.h pin:2.a pin:3.g3 pin:4.g2 pin:5.- pin:6.g1 pin:7.k.s pin:8.h
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