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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.
The Type 77 is a sharp cut-off pentode similar to 6J7G.
The outer screen connects to a pressed plate and the top opening is small - just sufficient for the top cap connection to the control grid supports.
The classic envelope is 39 mm in diameter, and excluding the UX6 base pins is 98 mm tall.
References: Datasheet & 4059. 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 January 11, 2017.
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