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KR20

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ID = 18317
       
Country:
United States of America (USA)
Brand: Ken-Rad, The Kentucky Radio Corporation; Owensboro, KY
Tube type:  Wunderlich Tube   Detector 
Identical to KR20 = 90_Wunderlich
Similar Tubes
Normally replaceable-slightly different:
  90_Ken-Rad
Other characteristic (electr. data):
  29_Wunderlich ; WunderlichA_6pin
Other base and data slightly different:
  WunderlichA_5pin
First Source (s)
Aug.1932 : 70 Years of Radiotubes and V.
Base 6-Pin-Base U6A, old, USA (Codex=K)
Was used by Radio/TV-reception etc.
Filament Vf 2.5 Volts / If 1 Ampere / Indirect / Specified voltage AC/DC
Description

A triode with two equal grids and a single plate. Used as a full wave detector (am) with additional LF-amplification.

 
Text in other languages (may differ)
Dimensions (WHD)
incl. pins / tip		 x 103 x 38 mm / x 4.06 x 1.50 inch
Weight 34 g / 1.20 oz
Information source Babani, International Radio Tube Encyclopaedia   Page 114
Tube Lore (II)   p. 33
Röhrencodex , Röhren-Taschenbuch 1950 23000 Röhren
tubesockel_klein_wa6p_3.png KR20: W.H.
Wolfgang Holtmann

Just Qvigstad
Usage in Models 1= 1933?
Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):1

Collection of

Robert Gillespie (USA)
 
screenshot_20230313_045701_gallery.jpg

 
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