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ARP34

Sensibly equivalent to:
CV1053 EF39 OM6 VR53
    
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The ARP34 is a pre-CV UK Army screened variable μ Recieving Pentode designed for radio receiver use. The frequency range of operation would be up to 30 MHz and it was probably used as an IF amplifier. The commercial equivalent is the Mullard EF39.
The zinc paint is starting to flake off the glass envelope.
The classic envelope is 30 mm in diameter and, excluding the IO base pins, is 85 mm long.
References: Datasheet, 1040 & 1043. Type ARP34 was first introduced in 1939.

 

Pin Connections
IO
1
2
3
4
5
6
7
8
tc
m
h
a
g2
g3
-
h
k
g1

 

Absolute Maximum Operating Conditions
Pentode
Vh
Ah
Va
Vs
Vg
mAa
mAs
ra
gm
6.3
0.2
250
250
-2.5
6
1.7
1.5M
2.2
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated January 14, 2017.
shape:classic construction:pinch type:pentode age:1930.1940 base:io heater:6.3v pins:8 pin:1.m pin:2.h pin:3.a pin:4.g2 pin:5.g3 pin:6.- pin:7.h pin:8.k pin:tc.g1
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