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VR65A

Sensibly equivalent to:
ARP19 CV1335 CV1574 SP41
    
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The VR65A is an amplifier pentode with external zinc loaded paint metalisation as shielding. The 4.0 V heater was common in the 1930s when mains sets first began to appear.
By the 1960s they were again in limited demand for maintaining ex-Services test equipment (oscilloscopes, etc.) which was then popular in Amateur circles, and in Third-World countries.
The reverse has the detail 0LW17 in a circle..
The classic envelope is 32 mm in diameter and, excluding the MO base pins, is 80 mm tall.
References: Private communication, datasheet, 1040 & 1043. Type VR65A was first introduced in 1938.

 

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

 

Absolute Maximum Operating Conditions
Pentode
Vh
Ah
Va
Vs
Vg
mAa
mAs
ra
gm
4.0
0.95
200
200
-1.5
10.9
2.7
0.7M
8.5
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated May 05, 2019.
shape:classic construction:pinch type:pentode age:1930.1940 base:mo heater:4.0v pins:8 pin:1.h pin:2.k pin:3.a pin:4.g2 pin:5.g3 pin:6.m pin:7.- pin:8.h pin:tc.g1
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