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PM1HF

Sensibly equivalent to:
AR4 CV1303 HL210
See also:
The Azide Process - The Philips-Mullard (PM) Series - Mullard PM1HF Box - Mullard PM1HF Box
    
Extras ▼

 

The PM1HF is part of the first series of Philips-Mullard valves. The filament has an oxide coating applied by the Azide process. The PM1HF was introduced in 1926 as an HF amplifier and Also for use as a Detector. The µ or amplification factor is 15.
The glass at the top of the balloon is etched with the main information relating to the valve.
The balloon envelope is 40 mm in diameter and, excluding the B4 base pins, is 74 mm tall.
References: 1931 datasheet & 1043. Type PM1HF was first introduced in 1926.

 

Absolute Maximum Operating Conditions
Triode
Vh
Ah
Va
ra
gm
2.0
0.1
150
28k
0.5
Thanks to Andy Cowley for supplying the above PDF datasheet.
Updated December19, 2012.
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