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CV3649

Sensibly equivalent to:
PM22
See also:
The Philips-Mullard (PM) Series - Mullard PM22 Box - Some Important British Valves
    
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This valve is marked as a CV but was manufactured as a PM22. The PM22 output pentode itself dates from 1928, and was designed for battery operation. It clearly was still effective in 1941 when the CV system was introduced for service valves.
The filament and anode voltages are printed onto the top of the envelope together with the type designation.
The anode load impedance required is 8,000 Ohms.
This valve was made in both four and five pin versions, the connections are for the five pin version.
The balloon envelope is 47 mm in diameter and, excluding the B4 base pins, is 88 mm tall.
References: 1931 datasheet & 1043. Type CV3649 was first introduced in 1928.

 

Pin Connections
B4
1
2
3
4
5
a
f(-)
g1
f(+)
g2

 

Absolute Maximum Operating Conditions
Pentode
Vh
Ah
Va
Vs
Vg
mAa
mAs
gm
Pout
2.0
0.2
150
150
-10.0
15
4.0
1.3
0.35W
Thanks to Andy Cowley for supplying the above PDF datasheet.
Updated May 27, 2014.
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