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ACT6

Sensibly equivalent to:
AT75 CV1222 CV2825 E472+D3157 NT39
    
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The ACT6 is a air cooled power triode. The anode dissipation is 75 Watts and the design is for HF use up to 37 MHz at 75% of maximum rating..
The four pin bayonet base. The external copper anode is fitted with a corrugated heat sink.
In addition to ACT6 the glass also has etched into it the experimental Type of E472.
The other side of the glass has the word Factory - probably indicating a sample.
The screw top cap anode connection.
The external anode envelope is 45 mm in diameter and, excluding the base pins, is 197 mm tall.
Reference: Datasheet.

 

Pin Connections
1
2
3
4
tc
-
f
g1
f
a

 

Absolute Maximum Operating Conditions
Triode
Vh
Ah
Va
Vg
mAa
ra
gm
μ
10.0
1.65
1,500
-1
-
4,200
5.0
22
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated July 27, 2019.
shape:wide.metal.tube construction:pinch type:triode age:1930.1940 base: pins:4 pin:1.- pin:2.f pin:3.g1 pin:4.f pin:tc.a
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