radiomuseum.org

 
Please click your language flag. Bitte Sprachflagge klicken.

7B8

Information - Help 
ID = 3732
       
Country:
United States of America (USA)
Brand: Common type USA tube/semicond.
Tube type:  Pentagrid-Converter (Heptode)   Pentagrid (old) 
Identical to 7B8 = VT-208
Similar Tubes
Other shape (e.g. bulb type):
  7B8LM
Normally replaceable-slightly different:
  CV883
Other base:
  6A8 ; 6A8GT
First Source (s)
16.Feb.1939 : Electron Tube Registration List
Predecessor Tubes 6A8GT  
Successor Tubes 7Q7   14B8  

Base Loctal-8, B8G (Sylvania, 1938) (Codex=We)
Filament Vf 6.3 Volts / If 0.3 Ampere / Indirect / Parallel / series AC/DC
Tube prices 3 Tube prices (visible for members only)
Literature Essential Characteristics, GE 1973   
Taschenbuch zum Röhren-Codex 1948/49   
  7b8.png
  7B8: Courtesy Bureau Belper (De Muiderkring, Bussum), Scan Frank Philipse
Michael Schlör
 
7b8_1~~1.jpg
7B8: Own collection
Valery Gromov

 
409.png
7B8: Telefunken Werkstattbuch
Wolfgang Bauer

 
7b8_techdat01.png
7B8: Sylvania Technical Manual
Peter Hoddow


Usage in Models 2= 1939?? ; 7= 1939 ; 4= 1940?? ; 2= 1940? ; 20= 1940 ; 1= 1941? ; 53= 1941 ; 1= 1942?? ; 1= 1942? ; 14= 1942 ; 1= 1946?? ; 4= 1946? ; 5= 1946 ; 1= 1947?? ; 5= 1947? ; 2= 1947 ; 1= 1948?? ; 8= 1948? ; 10= 1948 ; 1= 1949?? ; 8= 1949? ; 4= 1949 ; 3= 1950?? ; 5= 1950? ; 4= 1951?? ; 2= 1951? ; 2= 1952?? ; 1= 1952? ; 2= 1952 ; 1= 1959? ; 1= 1959

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):176


You reach this tube or valve page from a search after clicking the "tubes" tab or by clicking a tube on a radio model page. You will find thousands of tubes or valves with interesting links. You even can look up radio models with a certain tube line up. [rmxtube-en]
  
rmXorg