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E2047

Sensibly equivalent to:
W107
    
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The E2047 is an experimental valve from M-OV and this one carries the serial number 44. On the outside of the box this exhibit came in was written in pen W107 and the heater rating matches this as does the pin connections.
Our other E2047 has W77 etched into the glass but the heater ran at 12.6 Volts not 6.3. The pin connections for the W77 and the W107 are the same suggesting that the W107 was a development of the W77 with a 12.6 heater.
The The bright anode with wire grids within.
The thin glass tube envelope is 18 mm in diameter and excluding the B7G base pins, is 46 mm long.
References: Datasheet & Observation.

 

Pin Connections
B7G
1
2
3
4
5
6
7
g1
k
h
h
a
g3
g2

 

Absolute Maximum Operating Conditions
Pentode
Vh
Ah
Va
Vs
Vg
mAa
mAs
ra
gm
12.6
0.1
250
150
-0.65
8
2
0.5M
2.5
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated September 11, 2013.
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