radiomuseum.org

 
Please click your language flag. Bitte Sprachflagge klicken.

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 = VT-78 = AG78 = CV2544 = G78
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 / Parallel / series 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.

 
Tube prices 1 Tube prices (visible for members only)
Literature Essential Characteristics, GE 1973   
Taschenbuch zum Röhren-Codex 1948/49   
  78.png
  78: Courtesy Bureau Belper (De Muiderkring, Bussum)
Michael Schlör
 
78_59rm357s.jpg
78: Collection JR
Jacob Roschy

 
472_9.png
78: Telefunken Werkstattbuch
Wolfgang Bauer

 
78_techdat01.png
78: Sylvania Technical Manual
Peter Hoddow


Usage in Models 46= 1933?? ; 116= 1933? ; 354= 1933 ; 47= 1934?? ; 76= 1934? ; 437= 1934 ; 49= 1935?? ; 63= 1935? ; 317= 1935 ; 21= 1936?? ; 35= 1936? ; 242= 1936 ; 11= 1937?? ; 10= 1937? ; 188= 1937 ; 7= 1938?? ; 14= 1938? ; 159= 1938 ; 22= 1939?? ; 8= 1939? ; 53= 1939 ; 9= 1940?? ; 5= 1940? ; 21= 1940 ; 4= 1941?? ; 3= 1941? ; 4= 1941 ; 14= 1942?? ; 5= 1942? ; 7= 1942 ; 2= 1943?? ; 2= 1945?? ; 1= 1946 ; 5= 1947?? ; 1= 1949?? ; 1= 1950?? ; 1= 2000?? ; 1= 9999? ; 1= 9999

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):2362


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

Forum contributions about this tube
78
Threads: 1 | Posts: 1
Hits: 2437     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

You reach this tube or valve page from a search after clicking the "tubes" tab or by clicking a tube on a radio model page. You will find thousands of tubes or valves with interesting links. You even can look up radio models with a certain tube line up. [rmxtube-en]
  
rmXorg