2A7, Tube 2A7; Röhre 2A7 (2A7)

Antique radios, Old Time Radios

2A7

Country:	United States of America (USA)		Brand:	Common type USA
			Tube type:	Pentagrid-Converter (Heptode) Pentagrid (old) Controlling (mu)

Tube ID = 2651


	previous \| next

Identical to	2A7 = Ut-2A7 = ER2A7
Similar Tubes	Other shape (e.g. bulb type): 2A7S Heater different: 6A7; Ut-6A7; Ut6A7
First Series	1933 Radios von gestern
Successor Tubes	6A8 6A8G

Base	7-Pin-Base U7A = small, old, USA (Codex=Mh) Top contact with a cap
Was used by	Radio/TV-reception etc.
Filament	Vf 2.5 Volts / If: 0.8 Ampere / -: Indirect / -: Parallel, (AC/DC) /
Tube prices	0 Tube prices (visible for members only)
Literature	Essential Characteristics, GE 1973 Taschenbuch zum Röhren-Codex 1948/49


	Courtesy Bureau Belper (De Muiderkring, Bussum), Scan Frank Philipse Karel De Reus

Röhrensammlung
Wolfgang Bauer

Telefunken Werkstattbuch
Wolfgang Bauer

Cunningham Radiotron Manual
Peter Hoddow

Usage in Models (calculation each 25th of the month)	2= 1931 ; 4= 1932 ; 7= 1933?? ; 16= 1933? ; 113= 1933 ; 22= 1934?? ; 19= 1934? ; 146= 1934 ; 12= 1935?? ; 10= 1935? ; 89= 1935 ; 6= 1936?? ; 11= 1936? ; 24= 1936 ; 1= 1937?? ; 1= 1937? ; 5= 1938 ; 1= 1939?? ; 5= 1939 ; 2= 1940 ;
Number of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe): 496

No further Information for

2A7

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]