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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 etching on the glass is very feint. The Marconi logo is just visible on the right. The original screw top cap is missing and replaced by an uninsulated nut.
The external anode envelope is 46 mm in diameter and, excluding the base pins, is 190 mm tall.
Reference: Data-sheet.

 

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 May 20, 2021.
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