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2A5

Information - Help 
ID = 2649
       
Country:
United States of America (USA)
Brand:
Tube type:  Vacuum Pentode   Power/Output 
Identical to 2A5 = UZ-2A5 = UZ2A5_Code9 = CV1834 = PH2A5 = PZH = VT158_GPO = CV1707 = NU-2A5
Similar Tubes
Other shape (e.g. bulb type):
  M2A5
Normally replaceable-slightly different:
  2A5E ; 38215 ; 95
Heater different:
  42
Other base and other heater:
  6F6G
First year 1932 -- Collector info (Sammler)
First Source (s)
Jun.1933 : -- Collector info (Sammler)
1932 : Communications Receivers
Predecessor Tubes 47   PZ  
Successor Tubes 6F6   6F6G  

Base 6-Pin-Base U6A, old, USA (Codex=Kdo)
Was used by Radio/TV-reception etc.
Filament Vf 2.5 Volts / If 1.75 Ampere / Indirect / Parallel, (AC/DC)
Description

The RME 9 Comms receiver is from 1932 and makes use of the 2A5. see Moore, Comm's. Receivers.

* 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 120 x 45 mm / x 4.72 x 1.77 inch
Weight 49 g / 1.73 oz
Tube prices 3 Tube prices (visible for members only)
Literature Essential Characteristics, GE 1973   
Taschenbuch zum Röhren-Codex 1948/49   
  2a5.png
  2A5: Courtesy Bureau Belper (De Muiderkring, Bussum), Scan Frank Philipse
Karel De Reus †
 
2a5_3.jpg
2A5: P.ST
Peter Steffen

 
470.png
2A5: Telefunken Werkstattbuch
Wolfgang Bauer

 
2a5_techdat01.png
2A5: Cunningham Radiotron Manual
Peter Hoddow


Usage in Models 4= 1932?? ; 20= 1932? ; 25= 1932 ; 22= 1933?? ; 49= 1933? ; 272= 1933 ; 38= 1934?? ; 50= 1934? ; 279= 1934 ; 34= 1935?? ; 28= 1935? ; 139= 1935 ; 5= 1936?? ; 15= 1936? ; 35= 1936 ; 3= 1937?? ; 1= 1937? ; 5= 1937 ; 3= 1938?? ; 1= 1938? ; 4= 1938 ; 1= 1939?? ; 1= 1939? ; 7= 1939 ; 1= 1940?? ; 2= 1940 ; 5= 1941? ; 1= 1950?? ; 5= 9999

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):1055


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

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