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DF22

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ID = 3489
       
Country:
Netherlands
Brand: Philips; Eindhoven (tubes international!); Miniwatt
Tube type:  Vacuum Pentode   RF/IF-Stage   Controlling (mu) 
Identical to DF22
Similar Tubes
Different connections:
  DF32
Other base:
  DF22_9pin
First year 1940 Tube leaflet collection E.Erb Analysis by original leaflets
First Source (s)
Dec.1939 : Daten und Schaltungen moderner ... Röhren; Philips # 3
Mar.1940 : Philips Bulletin # D 78
Predecessor Tubes DF22_9pin  
Base Octal (Int.Octal, IO) K8A, USA 1935 (Codex=Vu)
Filament Vf 1.4 Volts / If 0.05 Ampere / Direct / Battery =
Tube prices 3 Tube prices (visible for members only)
Information source Taschenbuch zum Röhren-Codex 1948/49   
df22.png
DF22: Courtesy Bureau Belper (De Muiderkring, Bussum), Scan Frank Philipse
Karel De Reus †
104_1.png DF22: Telefunken Werkstattbuch
Wolfgang Bauer

Just Qvigstad 		df22_spec.png
DF22: RVF-Röhrenbuch-M1,1947
Anonymous 15 Collector
More ...
Usage in Models 2= 1940? ; 2= 1940 ; 2= 1941?? ; 2= 1941? ; 7= 1941 ; 3= 1943?? ; 2= 1943 ; 5= 1944 ; 1= 1945?? ; 1= 1945? ; 2= 1945 ; 1= 1950?
Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):30

Collection of

Manfred Fries (CH)
Timo Rantasaari (FIN)
Collection of a member from FIN
Tor Steinnes (N)
Tomasz Szczesniak (PL)
Valery Gromov (RUS)
Oskar Elm (D)
Martin Steyer (D)
Karl - Heinz Bossan (D)
Peter Pfeiffer (D)
Andreas Schulz (D)
Collection of a member from D
 
df22_philips.jpg

DF22
 
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