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PM1LF

Sensibly equivalent to:
210LF CV3642 L210
See also:
The Philips-Mullard (PM) Series - The Azide Process - Mullard PM1LF Box
    
Extras ▼

 

The PM1LF is a classic battery valve. Designed to operate at low frequencies and operate from a 2 Volt accumulator and a 125 Volt HT battery. This would be used as an audio amplifier.
The label gives the operating conditions and guarantee.
The balloon envelope is 40 mm in diameter and, excluding the B4 base pins, is 85 mm tall.
References: 1931 datasheet & 1043. Type PM1LF was first introduced in 1926.

 

Pin Connections
B4
1
2
3
4
a
g1
f
f

 

Absolute Maximum Operating Conditions
Triode
Vh
Ah
Va
Vg
mAa
ra
gm
2.0
0.1
125
-0
5.8
12k
0.9
Thanks to Andy Cowley for supplying the above PDF datasheet.
Updated September 12, 2013.
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