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7S7

Country: Worldwide Brand: Common type Worldwide tube/semicond. Common type Worldwide tube/semicond. Canadian Marconi Co. Ltd. (CMC, Esterline), Marconi's Wireless; Montreal, QC Brimar (STC); Foots Cray Cossor, A.C.; London EMI; Hayes, Middlesex Ferranti, GB Haltron (brand), Hall Electric Ltd.; London Sylvania (Hygrade, GTE, Nilco); Emporium (PA) Tube type:  Triode-Heptode   Frequency converter   Controlling (mu)  Identical to 7S7 = X148 Similar Tubes Heater different:   14S7 First Source (s) 19.May.1941 : Electron Tube Registration List Predecessor Tubes 7J7   6K8GT   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 / Specified voltage AND current AC/DC Dimensions (WHD) incl. pins / tip 30 x 71 x mm / 1.18 x 2.80 x inch Weight 21 g / 0.74 oz Tube prices 6 Tube prices (visible for members only) Information source Essential Characteristics, GE 1973   Data SYLVANIA Tubes book Taschenbuch zum Röhren-Codex 1948/49    7S7: Courtesy Bureau Belper (De Muiderkring, Bussum), Scan Frank Philipse Anonymous 10 Collector 7S7: Telefunken Werkstattbuch Wolfgang Bauer More ... Just Qvigstad 7S7: Sylvania Radio Tubes Technical Manual Didier Tholomier More ... Usage in Models 1= 1940?? ; 4= 1941 ; 6= 1942 ; 3= 1945? ; 2= 1946?? ; 2= 1946? ; 15= 1946 ; 2= 1947?? ; 2= 1947? ; 31= 1947 ; 9= 1948?? ; 2= 1948? ; 30= 1948 ; 1= 1949?? ; 12= 1949? ; 27= 1949 ; 6= 1950?? ; 4= 1950? ; 41= 1950 ; 2= 1951? ; 23= 1951 ; 4= 1952? ; 17= 1952 ; 2= 1953?? ; 6= 1953? ; 10= 1953 ; 1= 1954?? ; 1= 1954? ; 5= 1954 ; 3= 1955?? ; 1= 1955? ; 3= 1955 ; 1= 9999 Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):279 Collection of Jay Kinnard (USA) Karl Günther Goldsteiner (A) Christian Schaufelberger (CH) Peter Steffen (CH) Collection of a member from FIN Walter Nigg (FL) Georges Werts (B) Tor Steinnes (N) Aldo Patriarca (CH) Tomasz Szczesniak (PL) Bruno Candreia (CH) Patrice Zeissloff (F) Michael Gnaedig-Fischer (MEX) Peter Pfeiffer (D) Aires Gomes (P) Günther Stabe † 19.8.20 (D)

7S7

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Hits: 3748     Replies: 1 7S7
Willy De Grande 30.Jul.05	1 7S7  Beschreibung : Triode - Heptode-converter : 7S7 auser/Uf 6.3V/= 14S7/Uf12.6v/                        Changeur de frequence triode-heptode. Data SYLVANIA  Tubes book Abmessungen : Dia. 30 mm / L (u.a) 71 mm.
Hans-Thomas Schmidt 30.Jul.05	2 No subject  Hallo Herr De Grande, Vielen Dank, die Angaben wurden übernommen. Beste Grüße, H.-T. Schmidt

 

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