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HL92

Sensibly equivalent to:
50C5 CV1959
See also:
Brimar American Miniature Valves Advert, November 1950
    
Extras ▼

 

This audio output valve has been designed for American voltages as the Brimar advert confirms.
With an anode load of 2,500 Ω it would deliver in a single ended configuration 1.9 Watts at 9% distortion.
The folded anode has a joining flange - seen on the left. Under the anode can be seen a bright sheet, this is the end of the beam plate.
Face view of the anode. At the base can be seen a large number of heater wires that look to have been held together with a ceramic paste.
The thin glass tube envelope is 18 mm in diameter and, excluding the B7G base pins, is 60 mm tall.
References: Data-sheet & 1040. Type HL92 was first introduced in 1950. See also 1950 adverts.

 

Pin Connections
B7G
1
2
3
4
5
6
7
k
g1
h
h
g1
g2
a

 

Absolute Maximum Operating Conditions
Pentode
Vh
Ah
Va
Vs
Vg
mAa
mAs
ra
gm
Pout
D
50.0
0.15
110
110
-7.5
49
4.0
10,000
7.5
1.9
9%
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated July 21, 2021.
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