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Country:
Worldwide
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Brand:
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Common type Worldwide tube/semicond.
Genalex, BGE (brand), British General Electric Co. Pty Ltd.; Sydney, NSW.
Osram (tubes/valves) - see British General Electrics; Sydney
Philips Australia
Canadian Marconi Co. Ltd. (CMC, Esterline), Marconi's Wireless; Montreal, QC
Purotron, Raga AG; Zürich
Brimar (STC); Foots Cray
British Tungsram Radio Works Ltd.
Mazda = Valve (Tube) brand GB (see also France)
Philco Radio & Television Corp. of Great Britain Ltd.; London
Fivre - tubes; Milano (MI)
Arcturus Radio Tube Co.; Newark, NJ
Bamberger, L. & Co; Newark, NJ
National Union Radio Corp.; Orange (NJ)
Raytheon Mfg. Co.; Cambridge, MA
Silvertone (tubes) - see also Sears; Chicago, IL
Sylvania (Hygrade, GTE, Nilco); Emporium (PA)
Triad Television & Mfg. Co.; Pawtucket, RI
Zenith (tubes), Duratron Radio Tube Corp.; New Jersey
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| Tube type: |
Vacuum Pentode RF/IF-Stage Controlling (mu) |
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| Identical to |
78
= 78E
= UZ-78
= UZ78
= A678
= VT-78
= AG78
= CV2544
= G78
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| Similar
Tubes |
Other shape (e.g. bulb type):
M78
Normally replaceable-slightly different:
38078
; T78
Other class quality (otherwise equal):
1604
Heater different:
24/78
; 337A
; 88S
Other base:
6K7G
; 78_Coronet
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| First year |
1933
The AWA Journal Vol. 7, 1992
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| First Source
(s) |
Mar.1933 : -- Collector info (Sammler)
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| Predecessor Tubes |
58
|
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Successor Tubes
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6K7G
6K7
6K7GT
6K7MG
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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 |
Remote cutoff RF/IF 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 |
1 Tube prices (visible for members
only)
|
| Information source |
Essential Characteristics, GE 1973
Tube Lore (II) p. 28
-- Collector info (Sammler)
Taschenbuch zum Röhren-Codex 1948/49
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78: Courtesy Bureau Belper (De Muiderkring, Bussum)
Anonymous 10 Collector
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78: Telefunken Werkstattbuch
Wolfgang Bauer
More ...
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Just Qvigstad
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78: 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):2516
Collection of
Collection of a member from I Collection of a member from FIN Collection of a member from FIN Collection of a member from D
| 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
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Metal coated cylindrical glass version. Complete name: M78. The letter "M" appears only on the boxes and enclosed paperwork, not on the tubes.
Please klick here: M78
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