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43

Sensibly equivalent to:
A2543 CV2514 ER43
    
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The Type 43, is an audio output pentode that is designed for use in receivers with a series heater chain. It is electrically identical to the IO based 25A6. The valve is rated for use in low power single ended output stages.
This exhibit has a slim-line classic envelope of 38 mm diameter. Other examples have an envelope diameter of 44-45 mm.
The top mica components. The control grid has a heat radiating fin and copper supports.
The classic envelope is 38 mm in diameter and, excluding the UX6 base pins, is 101 mm tall.
References: Datasheet, 1040 & 1043. Type 43 was first introduced in 1932.

 

Pin Connections
UX6
1
2
3
4
5
6
h
a
g2
g1
k
h

 

Absolute Maximum Operating Conditions
Pentode
Vh
Ah
Va
Vs
Vg
mAa
mAs
ra
gm
Pout
D
25
0.3
160
120
-18
36
12
42,000
2.4
2.2W
10%
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated November 01, 2015.
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