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CV1663

Sensibly equivalent to:
3A/109B 4021B AR20 POVT87
    
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The CV1663 is a directly heated triode. The prototype was the 4021B. The old GPO code is POVT87 and the Army code is AR20.
Reference: Data-sheet.

 

Pin Connections
B4
1
2
3
4
a
g1
f-
f+

 

Absolute Maximum Operating Conditions
Triode
Vh
Ah
Va
ra
gm
μ
4.0
0.25
160
2,000
3.0
6.0
Thanks to Frank Philipse for supplying the above PDF datasheet.
Updated October 29, 2017.
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