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1R4

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ID = 4169
       
Country:
United States of America (USA)
Brand: Common type USA tube/semicond.
Tube type:  Signal Diode - one single system 
Identical to 1R4 = VT-183 = 1294 = CV2709
Base Loctal-8, B8G (Sylvania, 1938) (Codex=Wh)
Filament Vf 1.4 Volts / If 0.15 Ampere / Indirect / Battery =
Tube prices 3 Tube prices (visible for members only)
Information source Essential Characteristics, GE 1973   
Taschenbuch zum Röhren-Codex 1948/49   
1r4.png
1R4: Courtesy Bureau Belper (De Muiderkring, Bussum), Scan Frank Philipse
Karel De Reus †
307.png 1R4: Telefunken Werkstattbuch
Wolfgang Bauer

Just Qvigstad 		1r4_techdat01.png
1R4: Sylvania Technical Manual
Peter Hoddow
Usage in Models 2= 1937? ; 1= 1942 ; 3= 1948?? ; 2= 1949 ; 1= 1950?? ; 1= 1950? ; 1= 1952 ; 1= 1954? ; 1= 1955
Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):13

Collection of

Patrice Zeissloff (F)
Marcello Astolfi (I)
Valery Gromov (RUS)
 
t831ak_01_1294_1r4~~1.jpg

1R4
 
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