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TH22C

Sensibly equivalent to:
302THA TH2321 TH29 TH30C
    
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The TH22C is a 200 mA heater version of the TH4A that features a 4.0 Volt 1.5 Amp heater. The valve is a triode hexode designed for frequency changer service in superhet receivers.
The classic envelope is 47 mm in diameter and, excluding the B7 base pins, is 121 mm tall.
References: Datasheet & 1043. Type TH22C was first introduced in 1937.

 

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

 

Absolute Maximum Operating Conditions
Hexode
Vh
Ah
Va
Vs
Vg
mAa
mAs
ra
gm
29.0
0.2
275
100
-2.5
3.25
7.0
1.5M
0.75

 

Absolute Maximum Operating Conditions
Triode
Va
mAa
100
22.0
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated December14, 2012.
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