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ID = 4421
Tube type:  Vacuum Pentode   RF/IF-Stage 
Identical to 4EH7 = LF183
Similar Tubes
Heater different:
  3EH7 ; 6EH7 ; EF183 ; XF183
First Source (s)
29.Feb.1960 : Electron Tube Registration List

Base Noval, B9A
Was used by Radio/TV-reception etc.
Filament Vf 4.4 Volts / If 0.45 Ampere / Indirect / Series, AC/DC /
Tube prices 2 Tube prices (visible for members only)
Literature Essential Characteristics, GE 1973   

  4EH7: Internet
Miguel Angel Trujillo-Rodriguez
4EH7: scc
Christian Schaufelberger

4EH7: 4EH7
Vitor Oliveira

4EH7: RCA Tube Manual
Peter Hoddow

Usage in Models 1= 1961? ; 1= 1965?? ; 1= 1967?? ; 1= 1968?? ; 4= 1970?? ; 1= 1978?

Quantity of Models at with this tube (valve, valves, valvola, valvole, válvula, lampe):9

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