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7C7

Sensibly equivalent to:
6W7G CV1777 VT-193
    
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The 7C7 is a sharp cut-off RF pentode on a B8B or Loctal base. The characteristics are close to the older 6J7GT.
The outer screen covers the rest of the construction.
The mirror dome carries the Type designation.
The wide glass tube envelope is 27 mm in diameter, and excluding the B8B base pins is 53 mm tall.
Reference: Datasheet. Type 7C7 was first introduced in 1940.

 

Pin Connections
B8B
1
2
3
4
5
6
7
8
h
a
g2
g3
s
g1
k
h

 

Absolute Maximum Operating Conditions
Pentode
Vh
Ah
Va
Vs
Vg
mAa
mAs
ra
gm
6.3
0.15
250
100
-3.0
2.0
0.5
2M
1.3
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated April 20, 2015.
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