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VR38

Sensibly equivalent to:
41MLF CV1038 MHL4 NR26 POVT91
See also:
CV1038 short entry
    
Extras ▼

 

The VR in the VR38, tells us that this was an RAF designation prior to WWII. The valve, on a B5 base, is an ampplifier triode for detector of audio amplifier applications.
The etched identification lozenge is clearly of M-OV style and the MHL4 looks the same.
The opacity of the envelope veils the internal structure.
The classic envelope is 42 mm in diameter and, excluding the B5 base pins, is 91 mm tall.
References: Datasheet & 1040.

 

Pin Connections
B5
1
2
3
4
5
a
g1
h
h
k

 

Absolute Maximum Operating Conditions
Triode
Vh
Ah
Va
Vg
mAa
ra
gm
4.0
1.0
250
-8
8
8,000
2.5
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated April 03, 2015.
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