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78

Information - Help 
ID = 2734
       
Country:
Worldwide
Brand:
Tube type:  Vacuum Pentode   RF/IF-Stage   Controlling (mu) 
Identical to 78 = 78E = UZ-78 = UZ78 = A678 = AG78 = CV2544 = G78 = VT-78
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
First year 1933 The AWA Journal Vol. 7, 1992
First Source (s)
Mar.1933 : -- Collector info (Sammler)
Predecessor Tubes 58  
Successor Tubes 6K7G   6K7   6K7GT   6K7MG  

Base 6-Pin-Base U6A, old, USA (Codex=Kf) Top contact with a cap.
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.

 
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

78.png
78: Courtesy Bureau Belper (De Muiderkring, Bussum)
Anonymous 10 Collector

472_9.png 78: Telefunken Werkstattbuch
Wolfgang Bauer

More ...

Just Qvigstad
78_techdat01.png
78: Sylvania Technical Manual
Peter Hoddow

More ...
Usage in Models 44= 1933?? ; 122= 1933? ; 368= 1933 ; 52= 1934?? ; 97= 1934? ; 450= 1934 ; 55= 1935?? ; 78= 1935? ; 335= 1935 ; 26= 1936?? ; 45= 1936? ; 250= 1936 ; 15= 1937?? ; 12= 1937? ; 190= 1937 ; 6= 1938?? ; 18= 1938? ; 162= 1938 ; 22= 1939?? ; 11= 1939? ; 53= 1939 ; 11= 1940?? ; 5= 1940? ; 22= 1940 ; 8= 1941?? ; 3= 1941? ; 6= 1941 ; 14= 1942?? ; 5= 1942? ; 7= 1942 ; 2= 1943?? ; 2= 1945?? ; 1= 1945 ; 1= 1946 ; 5= 1947?? ; 1= 1948?? ; 2= 1948 ; 1= 1949?? ; 2= 1949 ; 4= 1950?? ; 1= 2000?? ; 1= 9999? ; 1= 9999

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):2516


Collection of


Documents about this component
  RMA qualification record for tube types 76, 77, 78, 6C6, 6D6, 75, 41, 42, 2A5, 85, 6F7, 80, 84 and 6A7. 1569 KB
 
78_59rm357s.jpg

78
 

Variants

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


Forum contributions about this tube
78
Threads: 1 | Posts: 1
Hits: 4006     Replies: 0
78 (78)
Reinhard Hanschke
14.Aug.07
  1

Neupreis 1938: 57,00 FFR. Lit.: Catalog der Fa. MANUFRANCE (MF) von 1938.

 
78
End of forum contributions about this tube

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