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FC13C

Sensibly equivalent to:
13PGA 15D1 CV2956 VO13
    
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The FC13C is an octode frequency changer. It was made in two versions, the FC13 on a Ct8 base and this version on a B7 base.
In use the local oscillator would be formed between the cathode and screen grid. The signal usually being added at g4, the top cap.
Such golden external metalised valves can be seen in radio sets from the mid1930's to early 1940's.
The classic envelope is 42 mm in diameter and, excluding the B7 base pins, is 110 mm tall.
References: Datasheet & 1043. Type FC13C was first introduced in 1935.

 

Pin Connections
B7
1
2
3
4
5
6
7
tc
g2
g1
g3,g5
h
h
m,k
a
g4

 

Absolute Maximum Operating Conditions
Octode
Vh
Ah
Va
Vs
Vg
mAa
mAs
ra
gm
13.0
0.2
200
70
-1.5
1.6
3.8
2M
0.6
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated December14, 2012.
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