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.
Osram (tubes/valves) - see British General Electrics; Sydney
Canadian Marconi Co. Ltd. (CMC, Esterline), Marconi's Wireless; Montreal, QC
Stella (tubes); (where?)
Raytheon Mfg. Co.; Cambridge, MA
Sylvania (Hygrade, GTE, Nilco); Emporium (PA)
Triad Television & Mfg. Co.; Pawtucket, RI
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Tube type: |
Vacuum Pentode Universal |
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Identical to |
77
= UZ-77
= 77E
= A677
= ER77
= VT-77
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Similar
Tubes |
Other shape (e.g. bulb type):
M77
Normally replaceable-slightly different:
38077
; 6C6
Other class quality (otherwise equal):
CV616
Heater different:
24/77
; 57
Other base:
6D7
; 6J7G
; 77M
; 77_Coronet
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First year |
1933
The AWA Journal Vol. 7
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First Source
(s) |
Mar.1933 : -- Collector info (Sammler)
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Predecessor Tubes |
57
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Successor Tubes
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1933
6J7
6D7
6J7G
6J7MG
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Base |
6-Pin-Base U6A, old, USA (Codex=Kf)
Top contact with a cap.
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Was used by |
Radio/TV-reception etc. |
Filament |
Vf 6.3 Volts / If 0.3 Ampere / Indirect / Specified voltage AND current AC/DC |
Description |
Triple grid detector amplifier.
* RMA/JEDEC register record available by courtesy of TCA* - This tube was already listed by several manufacturers when RMA started its standardization in 1934. In order to characterize popular receiving types, manufacturers were asked to supply average characteristics as measured on production lots. Here are the filled answer forms supplied by Radio Valve Co., Raytheon, Sparton, Triad, Tung Sol, Ken Rad, Hytron and Arcturus. Full record is downloadable here.
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Dimensions (WHD) incl. pins / tip |
x 118 x 34 mm / x 4.65 x 1.34 inch |
Weight |
38 g / 1.34 oz |
Tube prices |
3 Tube prices (visible for members
only)
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Information source |
Essential Characteristics, GE 1973
Tube Lore (II) p. 28
-- Collector info (Sammler)
Taschenbuch zum Röhren-Codex 1948/49
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77: Courtesy Bureau Belper (De Muiderkring, Bussum)
Anonymous 10 Collector
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77: Telefunken Werkstattbuch
Wolfgang Bauer
More ...
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Just Qvigstad
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77: Sylvania Technical Manual
Peter Hoddow
More ...
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Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):674
Collection of
Collection of a member from FIN
Documents about this component |
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RMA qualification record for tube types 76, 77, 78, 6C6, 6D6, 75, 41, 42, 2A5, 85, 6F7, 80, 84 and 6A7. |
1569 KB |
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Variants
Metal coated cylindrical glass version. Complete name: M77. The letter "M" appears only on the boxes and enclosed paperwork, not on the tubes.
Please klick here: M77
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