Please click your language flag. Bitte Sprachflagge klicken.


Information - Help 
ID = 56983
Tube type:  Vacuum Pentode   RF/IF-Stage 
Identical to KF4E

Base Europe side contact, small P5 (Au V, 5E)
Was used by Radio/TV-reception etc.
Filament Vf 1.9 Volts / If 0.18 Ampere / Direct / Battery =
Description KF4- Not-Ersatzröhre, Hersteller unbekannt
Kappe: Steuergitter G1, Ua 120V, Ia 3,5mA, Bremsgitterspannung: 0, Ug1 -1,5V, Ug2 80V, Ig2 0,8mA, S 1mA/V, D 8%, Sockel:Außenkontakt V5A oder V, Gesamtlänge: 80mm, Kolben-Ø: 20mm, Gewicht: 16g, 
Dimensions (WHD)
incl. pins / tip
20 x 80 x mm / 0.79 x 3.15 x inch
Weight 16 g / 0.56 oz
Information source - - -   
- - -   
- - -
- - -

kf4e_sockel_rr.gif KF4E: RR
Reinhard Riek

Just Qvigstad

Collection of



You reach this tube or valve page from a search after clicking the "tubes" tab or by clicking a tube on a radio model page. You will find thousands of tubes or valves with interesting links. You even can look up radio models with a certain tube line up. [rmxtube-en]

Data Compliance More Information