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7H7

Information - Help 
ID = 2728
       
Country:
United States of America (USA)
Brand: Common type USA tube/semicond.
Tube type:  Vacuum Pentode   RF/IF-Stage   Controlling (mu) 
Identical to 7H7 = VT-190 = CV895 = W148
Similar Tubes
Heater different:
  14H7
Other base:
  6SG7
First Source (s)
20.Mar.1940 : Electron Tube Registration List
Successor Tubes 6BA6  

Base Loctal-8, B8G (Sylvania, 1938) (Codex=W)
Was used by Radio/TV-reception etc.
Filament Vf 6.3 Volts / If 0.3 Ampere / Indirect / Parallel / series AC/DC /
Description

Nominal heater ratings by design were 7 V at 320 mA.

 
Tube prices 5 Tube prices (visible for members only)
Literature Essential Characteristics, GE 1973   
Taschenbuch zum Röhren-Codex 1948/49   

  7h7.png
  7H7: Courtesy Bureau Belper (De Muiderkring, Bussum), Scan Frank Philipse
Michael Schlör
 
7h7_13.jpg
7H7: Collection JR
Jacob Roschy

 
358_5.png
7H7: Telefunken Werkstattbuch
Wolfgang Bauer

 
7h7_daten_p1.png
7H7: Sylvania Radio Tubes 1952
Daniel Consales


Usage in Models 7= 1940 ; 3= 1941?? ; 6= 1941? ; 36= 1941 ; 6= 1942?? ; 6= 1942? ; 18= 1942 ; 8= 1945? ; 2= 1945 ; 11= 1946?? ; 1= 1946? ; 29= 1946 ; 6= 1947?? ; 15= 1947? ; 21= 1947 ; 7= 1948?? ; 1= 1948? ; 43= 1948 ; 2= 1949?? ; 2= 1949? ; 2= 1949 ; 1= 1950?? ; 17= 1950 ; 1= 1952?? ; 2= 1952? ; 1= 1957??

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):254


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