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1B4E

Sensibly equivalent to:
32
    
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The 1B4E is electrically a Type 32 in a smaller envelope. It was designed as an RF amplifier in battery operated receivers.
The screening hides the inner structure.
The UX4 base pins.
With much enhancement the Type designation can now be read.
The box clearly places the 1B4 as equivalent to the Type 32.
Thanks to Mark Mallison for sending the images.
The classic envelope is  mm in diameter and, excluding the UX4 base pins, is  mm tall.
References: Datasheet & 1043.

 

Pin Connections
UX4
1
2
3
4
tc
f
a
g2
f
g1

 

Absolute Maximum Operating Conditions
Tetrode
Vh
Ah
Va
Vs
Vg
mAa
mAs
ra
gm
2.0
0.06
180
67.5
-3
1.7
0.4
1.2M
0.65
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated October 13, 2019.
shape:classic construction:pinch type:tetrode age:1930.1940 base:ux4 heater:2.0v pins:4 pin:1.f pin:2.a pin:3.g2 pin:4.f pin:tc.g1
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