Antique radios, Old Time Radios

7A8

ID = 2725

Country:

United States of America (USA)

Brand:	Common type USA tube/semicond.
Tube type:	OCTODE Frequency converter

Identical to

7A8 = CV878

First Source (s)

10.Jun.1938 : Electron Tube Registration List

Predecessor Tubes

6D8G

Base

Loctal-8, B8G (Sylvania, 1938) (Codex=Weo)

Filament

Vf 6.3 Volts / If 0.15 Ampere / Indirect / Specified voltage AND current AC/DC

Tube prices

4 Tube prices (visible for members only)

Information source

Essential Characteristics, GE 1973
Taschenbuch zum Röhren-Codex 1948/49

7A8: Courtesy Bureau Belper (De Muiderkring, Bussum), Scan Frank Philipse Anonymous 10 Collector
7A8: Telefunken Werkstattbuch Wolfgang Bauer More ...	Just Qvigstad	7A8: Sylvania Technical Manual Peter Hoddow More ...

Usage in Models

13= 1938 ; 1= 1939?? ; 71= 1939 ; 1= 1940? ; 30= 1940 ; 1= 1941?? ; 38= 1941 ; 3= 1942? ; 3= 1942 ; 1= 1944 ; 1= 1945? ; 2= 1945 ; 1= 1946?? ; 1= 1946? ; 23= 1946 ; 2= 1947?? ; 3= 1947? ; 9= 1947 ; 1= 1948?? ; 1= 1948? ; 26= 1948 ; 1= 1949? ; 16= 1949 ; 6= 1950?? ; 17= 1950 ; 3= 1951? ; 40= 1951 ; 2= 1952?? ; 1= 1952? ; 6= 1952 ; 2= 1953?? ; 3= 1953 ; 1= 1954? ; 6= 1954 ; 1= 1960?

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):337

Collection of

Aires Gomes (P)

David Erali (USA)

Christian Schaufelberger (CH)

Bruce Morgenstern (CDN)

Otto Kippes † 24.4.17 (D)

Collection of a member from FIN

7A8

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