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PM24A

Sensibly equivalent to:
CV1167 NR43
See also:
The Philips-Mullard (PM) Series - CV1167 short entry
    
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The PM24A is an example of an early mains valve from 1929 and was designed as an audio output valve. With a load resistance of 8k Ohms it could deliver 1.5 Watts.
In the 1930's it was improved and the new ratings are in the second set of parameters. With a load resistance of 10k Ohms it could deliver 2.5 Watts at 10% distortion.
The balloon envelope is 48 mm in diameter and excluding the B5 base pins it is 87 mm tall.
References: 1931 datasheet & 1043. Type PM24A was first introduced in 1929.

 

Pin Connections
B5
1
2
3
4
5
a
g1
f-
f+
g2

 

Absolute Maximum Operating Conditions
Pentode
Vh
Ah
Va
Vs
Vg
mAa
mAs
gm
4.0
0.275
300
200
-21.0
21
6.0
2.0

 

Absolute Maximum Operating Conditions
Pentode
Va
Vs
Vg
mAa
mAs
gm
300
200
-22.5
20
3.5
2.0
Thanks to Andy Cowley for supplying the above PDF datasheet.
Updated April 04, 2015.
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