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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 / Specified voltage AND current AC/DC
Tube prices 3 Tube prices (visible for members only)
Information source Essential Characteristics, GE 1973   
Taschenbuch zum Röhren-Codex 1948/49   
7b8.png
7B8: Courtesy Bureau Belper (De Muiderkring, Bussum), Scan Frank Philipse
Anonymous 10 Collector
409.png 7B8: Telefunken Werkstattbuch
Wolfgang Bauer
More ...
Just Qvigstad 		7b8_techdat01.png
7B8: Sylvania Technical Manual
Peter Hoddow
More ...
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? ; 3= 1947 ; 1= 1948?? ; 8= 1948? ; 10= 1948 ; 1= 1949?? ; 8= 1949? ; 4= 1949 ; 3= 1950?? ; 5= 1950? ; 4= 1951?? ; 2= 1951? ; 1= 1952?? ; 1= 1952? ; 1= 1952 ; 1= 1959? ; 1= 1959
Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):175

Collection of

Tomasz Szczesniak (PL)
Thomas Loidl (A)
Peter Pfeiffer (D)
Georges Werts (B)
Patrice Zeissloff (F)
Collection of a member from FIN
Valery Gromov (RUS)
Aldo Patriarca (CH)
Hermann Fleischanderl (A)
Michael Gnaedig-Fischer (MEX)
Shaun Merrigan (CDN)
Manfred Fries (CH)
Bruce Morgenstern (CDN)
Christian Schaufelberger (CH)
George Papaiz (CDN)
David Erali (USA)
 
7b8_1~~1.jpg

7B8
 
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