Antique radios, Old Time Radios
2B7
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Country:
United States of America (USA)
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Brand:
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Common type USA tube/semicond.
Genalex, BGE (brand), British General Electric Co. Pty Ltd.; Sydney, NSW.
Ken-Rad - see also Amalgamated Wireless Valve Co.
Murdoch's Ltd.; Sydney
Osram (tubes/valves) - see British General Electrics; Sydney
Canadian Marconi Co. Ltd. (CMC, Esterline), Marconi's Wireless; Montreal, QC
All Wave Tube Company; Pawtucket, RI
Keletron; (Where ?)
Philco, Philadelphia Stg. Batt. Co.; USA
Raytheon Mfg. Co.; Cambridge, MA
Real Tone Tube Co.; Pawtucket, RI
Roytron (tubes) - see also Triad Television & Mfg. Co.; Pawtucket, RI
Sylvania (Hygrade, GTE, Nilco); Emporium (PA)
Triad Television & Mfg. Co.; Pawtucket, RI
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| Developer: |
RCA (RCA Victor Co. Inc.); New York (NY) |
| Tube type: |
Double Diode-Pentode Universal Controlling (mu) |
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| Identical to |
2B7
= Ut2B7
= ER2B7
= PH2B7
= VT157_GPO
= NU-2B7
= CV1706
|
| Similar
Tubes |
Other shape (e.g. bulb type):
G-2B7-S
Normally replaceable-slightly different:
2B7EE
; 2B7S
; 38227
Heater different:
6B7
Other base and other heater:
6B8G
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| First Source
(s) |
1933 : The AWA Journal Vol. 7
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Successor Tubes
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6B8
6B8G
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| Base |
7-Pin-Base U7A = small, old, USA (Codex=Mb)
Top contact with a cap.
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| Was used by |
Radio/TV-reception etc. |
| Filament |
Vf 2.5 Volts / If 0.8 Ampere / Indirect / Specified voltage AC/DC |
| Description |
Glass type used as combined detector, amplifier, and avc tube.
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Dimensions (WHD)
incl. pins / tip |
x 116 x 38 mm / x 4.57 x 1.50 inch |
| Weight |
39 g / 1.38 oz |
| Tube prices |
2 Tube prices (visible for members
only)
|
| Information source |
Essential Characteristics, GE 1973
Taschenbuch zum Röhren-Codex 1948/49
Babani, International Radio Tube Encyclopaedia
Röhrencodex , Röhren-Taschenbuch 1950 23000 Röhren
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2B7: Cunningham Radiotron Manual
Peter Hoddow
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2B7: Telefunken Werkstattbuch
Wolfgang Bauer
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Just Qvigstad
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2B7: Cunningham Radiotron Manual
Peter Hoddow
More ...
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Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):396
Collection of
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