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PM3

Sensibly equivalent to:
CV1151 NR15
See also:
The Philips-Mullard (PM) Series - Mullard PM3 Box - Mullard PM3 Box - The Dawn of Broadcasting in the UK - CV1151 short entry
    
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The PM3 was introduced in 1926 as a general purpose triode with a μ of 14. The filament current, initially 0.1 Amp was later reduced to 0.075 Amps as in PM3. This exhibit draws 0.07 A at 4.0 V.
The base has the vertical line indicating the anode pin. There is no indication that this line ever had white paint in the groove as some Mullard valves had.
The balloon envelope is 45 mm in diameter and, excluding the B4 base pins, is 91 mm tall.
References: 1931 datasheet & 1004 Type PM3 was first introduced in 1926.

 

Pin Connections
B4
1
2
3
4
a
g1
f
f

 

Absolute Maximum Operating Conditions
Triode
Vh
Ah
Va
ra
gm
4.0
0.075
125
16,000
0.85
Thanks to Andy Cowley for supplying the above PDF datasheet.
Updated April 04, 2015.
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