Antique radios, Old Time Radios

7B8

Country:	United States of America (USA)		Brand:	Common type USA
			Tube type:	Pentagrid-Converter (Heptode) Pentagrid (old)

Tube ID = 3732


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Identical to	7B8 = VT-208
Similar Tubes	Other shape (e.g. bulb type): 7B8LM Other base: 6A8; 6A8GT
First Source (s)	16.Feb.1939 : Electron Tube Registration List
Predecessor Tubes	6A8GT
Successor Tubes	7Q7

Base	Loctal-8, B8G (Sylvania, 1938) (Codex=We)
Was used by	Radio/TV-reception etc.
Filament	Vf 6.3 Volts / If: 0.3 Ampere / -: Indirect / -: Parallel / series AC/DC /
Tube prices	0 Tube prices (visible for members only)
Literature	Essential Characteristics, GE 1973 Taschenbuch zum Röhren-Codex 1948/49


	Courtesy Bureau Belper (De Muiderkring, Bussum), Scan Frank Philipse Michael Schlör

Röhrensammlung
Hermann Fleischanderl

Telefunken Werkstattbuch
Wolfgang Bauer

Sylvania Technical Manual
Peter Hoddow

Usage in Models (calculation each 25th of the month)	3= 1939?? ; 1= 1939? ; 5= 1939 ; 1= 1940?? ; 19= 1940 ; 1= 1941?? ; 1= 1941? ; 48= 1941 ; 14= 1942 ; 4= 1946? ; 4= 1946 ; 1= 1947?? ; 4= 1947? ; 1= 1947 ; 4= 1948? ; 10= 1948 ; 1= 1949?? ; 6= 1949? ; 4= 1949 ; 2= 1950?? ; 5= 1950? ; 4= 1951?? ; 2= 1951? ; 1= 1952?? ; 4= 1952? ;
Number of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe): 150

No further Information for

7B8

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