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PM1LF

Sensibly equivalent to:
210LF CV3642 L210
See also:
The Azide Process - Mullard PM1LF Box
    
Extras ▼

 

The PM1LF is part of the first series of Philips-Mullard valves. The filament has an oxide coating applied by the Azide process. The PM1LF was introduced in 1926 as an AF amplifier. The µ or amplification factor is nine.
The balloon envelope is 40 mm in diameter and, excluding the B4 base pins, is 73 mm tall.
References: 1931 datasheet & 1043. Type PM1LF was first introduced in 1926.

 

Absolute Maximum Operating Conditions
Triode
Vh
Ah
Va
ra
gm
2.0
0.1
125
18k
0.5
Thanks to Andy Cowley for supplying the above PDF datasheet.
Updated September 12, 2013.
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