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AC/HL

Sensibly equivalent to:
354V 41MHL A30D AR17 CV399 CV1037 CV2811 D4 HL4 MH4 MHL4 NR31 VR37
See also:
Shortpath Construction - 1929 Advert
    
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The AC/HL indirectly heated amplifier triode makes use of the 'Shortpath' technique construction.
See AC/HL for full details.
The balloon envelope is 57 mm in diameter and, excluding the B5 base pins, is 110 mm tall.
References: Data-sheet, 1043 & 3002. Type AC/HL was first introduced in 1929.

 

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
200
-2.75
6
10,000
3.5
PDF scanned from an original document held by the museum
Updated June 08, 2020.
shape:balloon construction:pinch type:triode age:1920.1930 base:b5 heater:4.0v pins:5 pin:1.a pin:2.g1 pin:3.h pin:4.h pin:5.k
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