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28D7

Information - Help 
ID = 5716
       
Country:
United States of America (USA)
Brand: Common type USA tube/semicond.
Developer:  
Tube type:  Double Beam Power Tube   Power/Output 
Identical to 28D7 = CV945
Similar Tubes
Other class quality (otherwise equal):
  28D7W ; GB-28D7W
Different maximum ratings:
  1238
Successor Tubes CV946  

Base Loctal-8, B8G (Sylvania, 1938) (Codex=Wab)
Filament Vf 28 Volts / If 0.4 Ampere / Indirect / Parallel, (AC/DC)
Description

Designed to operate with common, heater and B+, 28V supply. At 0V grid bias, 28V plates and screen grids, delivers 600mW across 1500 ohms plate-to-plate load.

 
Tube prices 2 Tube prices (visible for members only)
Literature Essential Characteristics, GE 1973   
Taschenbuch zum Röhren-Codex 1948/49   
  28d7.png
  28D7: Internet
Miguel Angel Trujillo-Rodriguez
 
28d7_ph4r.jpg
28D7: Patrice ZEISSLOFF
Patrice Zeissloff

 
28d7_so.png
28D7: rtt
Michael Schlör

 
28d7_techdat01.png
28D7: Sylvania Technical Manual
Peter Hoddow


Usage in Models 1= 1939?? ; 1= 1940?? ; 1= 1941? ; 1= 1942?? ; 1= 1943 ; 1= 1945? ; 1= 1946?? ; 1= 1946 ; 1= 1948?? ; 1= 1949? ; 1= 1958

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):11


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