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EC81

Information - Help 
ID = 18581
       
Country:
Germany
Brand: Valvo GmbH, Radioröhrenfabrik; Hamburg
Tube type:  Triode, vacuum   UHF 
Identical to EC81 = 6R4
Similar Tubes
Different connections:
  EC83
Other base:
  EC41
First Source (s)
Mar.1949 : -- Original-techn. papers.
Base Noval, 9 pin miniature (USA pico-9) B9A
Was used by Technology / Measurement
Filament Vf 6.3 Volts / If 0.175 Ampere / Indirect / Specified voltage AC/DC
Description

HF 750MHz (Osc), auch von Tesla Prag hergestellt.

 
Tube prices 5 Tube prices (visible for members only)
Information source
ec81~~1.png
EC81: corrected version
Roland Langfeld
no2.png EC81: RTT 1964 (Franzis) 10. Auflage
Martin Renz

Just Qvigstad 		ec81_01.png
EC81: Manufacturer's Literature
Emilio Ciardiello
More ...
Usage in Models 1= 1949? ; 2= 1949 ; 1= 1951?? ; 1= 1951 ; 1= 1952?? ; 1= 1952? ; 1= 1952 ; 1= 1953?? ; 4= 1953? ; 2= 1953 ; 1= 1954?? ; 1= 1954? ; 1= 1954 ; 2= 1955?? ; 1= 1955? ; 1= 1955 ; 4= 1956?? ; 3= 1956? ; 1= 1956 ; 1= 1957?? ; 1= 1957? ; 2= 1958?? ; 3= 1958? ; 1= 1958 ; 7= 1960?? ; 1= 1960? ; 1= 1961? ; 1= 1962?? ; 3= 1964 ; 1= 1965 ; 1= 1966?? ; 1= 1967?? ; 1= 1970??
Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):55

Collection of

Ottmar Rollmann (D)
Danko Tkalec (HR)
Jacob Roschy (D)
Karl - Heinz Bossan (D)
Roland Biesler (D)
Patrice Zeissloff (F)
Collection of a member from FIN
Ernst Rykkje (N)
Tomasz Szczesniak (PL)
Georges Werts (B)
Bruno Candreia (CH)
Wolfgang Bauer (A)
 
ec81_valvo.jpg

EC81
 
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