Antique radios, Old Time Radios

2A5

ID = 2649

Country:

United States of America (USA)

Brand:

Common type USA tube/semicond.

Common type USA tube/semicond. Amalgamated Wireless Valve Co. Ltd. (AWV); Sydney, NSW Genalex, BGE (brand), British General Electric Co. Pty Ltd.; Sydney, NSW. Osram (tubes/valves) - see British General Electrics; Sydney Philips Australia Adzam (tubes made by MBLE, Belgium) Canadian Westinghouse, Hamilton Visseaux / Télévisso; Lyon / Paris Ken-Rad, The Kentucky Radio Corporation; Owensboro, KY National Union Radio Corp.; Orange (NJ) Philco, Philadelphia Stg. Batt. Co.; USA Raytheon Mfg. Co.; Cambridge, MA RCA (RCA Victor Co. Inc.); New York (NY) Real Tone Tube Co.; Pawtucket, RI Sylvania (Hygrade, GTE, Nilco); Emporium (PA) Triad Television & Mfg. Co.; Pawtucket, RI Tung-Sol Electric Inc.; Newark (NJ)

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:

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 defined voltage)
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)
Information source	Essential Characteristics, GE 1973 Taschenbuch zum Röhren-Codex 1948/49


	2A5: corrected version Roland Langfeld

2A5: P.ST
Peter Steffen

2A5: Telefunken Werkstattbuch
Wolfgang Bauer

2A5: Cunningham Radiotron Manual
Peter Hoddow

from Just Qvigstad

Usage in Models

5= 1932?? ; 20= 1932? ; 25= 1932 ; 22= 1933?? ; 52= 1933? ; 281= 1933 ; 40= 1934?? ; 60= 1934? ; 287= 1934 ; 37= 1935?? ; 32= 1935? ; 141= 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 ; 4= 1941? ; 1= 1945?? ; 1= 1950?? ; 5= 9999

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):1097

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.

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