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77

Sensibly equivalent to:
CV616
    
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The type 77 is a general purpose pentode voltage amplifier/detector. As a high impedance device the control grid is taken to the top cap for maximum isolation from the anode circuit.
Thanks to Carl Forsyth for sending the picture.
The classic envelope is 38 mm in diameter, and excluding the UX6 base pins is 100 mm tall.
References: Datasheet & 1040. Type 77 was first introduced in 1932.

 

Pin Connections
UX6
1
2
3
4
5
6
tc
h
a
g2
g3
k
h
g1

 

Absolute Maximum Operating Conditions
Pentode
Vh
Ah
Va
Vs
Vg
mAa
mAs
ra
gm
6.3
0.3
300
100
-3
2.3
0.5
1M
1.25
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated February 20, 2013.
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