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DET20

Information - Help 
ID = 17718
       
Country:
Great Britain (UK)
Brand: MO Valve Co. Ltd.; GB
Developer: MO Valve Co. Ltd.; GB 
Tube type:  Triode, vacuum   VHF 
Identical to DET20
Similar Tubes
Normally replaceable-slightly different:
  CV6
Base Octal (Int.Octal, IO) K8A, USA 1935
Was used by Transmittertube (Radio)
Filament Vf 6.3 Volts / If 0.17 Ampere / Indirect / Specified voltage AC/DC
Description

Horned triode with separate anode and grid top caps.
Meets the CV6 specification with a slightly lower heater current.
Classified as a transmitter tube (DET = Dull Emitter Transmitter), it was also used as a local oscillator.

 
Information source Babani, International Radio Tube Encyclopaedia   p. 198 & 199
-- Original-techn. papers.   
The Saga of Marconi Osram Valve
Taschenbuch zum Röhren-Codex 1948/49
det20_sockel.png DET20: Beier 2, 1957
Anonymous 384 Collector
More ...
Just Qvigstad 		det20.png
DET20: GEC's catalogue supplement
Anonymous 413 Collector

Collection of

Collection of a member from D
Patrick Marinus (B)
 
det20_uhftriode.jpg

DET20
 
Forum contributions about this tube
DET20
Threads: 1 | Posts: 2
Hits: 1913     Replies: 1
DET20 (DET20) UHF-Sende-Triode
Dietmar Rudolph † 6.1.22
07.Aug.08 		  1
DET20 (DET20) UHF-Sende-Triode 
Daten gemäß Beier 2, 1957:
Uf = 6,3V If = 0,17A (bei Beier ist ein Druckfehler: Uf = 0,3 V; Das kann nicht stimmen, da der Kaltwiderstand des Heizfadens ca. 18 Ω beträgt.)
Ua = 300V, Ia = 25 mA, S = 3mS, Ra = 8,3 kΩ, Na =3,5W, ce = 1pF, ca = 1pF, cg/a = 2,1 pF

DR
Roy Johnson
07.Aug.08 		  2
DET20 

6.3V at 0.17A is correct. 

The CV6 specification is for 0.2A (or less) and the DET20 meets this specification.  The equivalence has been changed to "normally replaceable".

Thank you, regards,

Roy

 
 
DET20
End of forum contributions about this tube
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