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VPU1

 
    
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The VPU1 is a variable μ RF pentode introduced in 1937.
The VPU1 was used by Ekco in their 1937 AD38 radio. Other valves in the line-up were SP13C straight HF pentode, Pen36C audio output pentode and UR1C half wave rectifier. This was an AC/DC straight or TRF broadcast receiver. The AD37 receiver used a VP13C rather than the VPU1. The VP13C is an HF variable μ pentode.
The classic envelope is 41 mm in diameter, and excluding the B7 base pins is 108 mm tall.
References: 1043. Type VPU1 was first introduced in 1937.

 

Pin Connections
B7
1
2
3
4
5
6
7
tc
a(d2)
m
a(d1)
h
h
k
a
g1

 

Absolute Maximum Operating Conditions
Pentode
Vh
Ah
Va
Vs
Vg
mAa
mAs
ra
gm
13
0.2
200
200
-2
9.0
3.6
-
2.2
Updated December14, 2012.
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