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ID = 4283
Tube type:  Triode, vacuum   UHF 
Identical to 3AF4A
Similar Tubes
Normally replaceable-slightly different:
Heater different:

Filament Vf 3.15 Volts / If 0.45 Ampere / Indirect / Specified current AC/DC ~ = (Series working)
Tube prices 1 Tube prices (visible for members only)
Information source Essential Characteristics, GE 1973   

3af4a.png 3AF4A: Datenblatt
Wolfgang Bauer

More ...
3AF4A: RCA Tube Manual
Peter Hoddow

Usage in Models 23= 1957? ; 9= 1958? ; 9= 1958 ; 1= 1959

Quantity of Models at with this tube (valve, valves, valvola, valvole, válvula, lampe):42

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