Antique radios, Old Time Radios

47

Country:	United States of America (USA)		Brand:	Common type USA tube
			Tube type:	Vacuum Pentode Power/Output

Tube ID = 2676

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Identical to	47 = P2 = 247 = PZ = UY-47_Japan = UY-247_Japan = A247 = VT-47 = PH247 = CV1772 = VT47_USA = F247 = Z-47 = 38047 = G-47 = 247S = EY647 = NY-247 = 447 = UY247B = PH247_Philips = UY247 = UY-247
Similar Tubes	Normally replaceable-slightly different: 47B; 47E; 47M; RES347 Other class quality (otherwise equal): 1610_RCA
First year	1931 Radios von gestern
First Source (s)	Jun.1931 : -- Collector info (Sammler) Jun.1931 : 70 Years of Radiotubes and V.
Predecessor Tubes	PZ
Successor Tubes	1932 2A5 42

Base	UY-Base, 5 Pins (USA, April 1927) (Codex=Hy)
Filament	Vf 2.5 Volts / If: 1.75 Ampere / -: Direct / -: Parallel, (AC/DC) /
Tube prices	0 Tube prices (visible for members only)
Literature	Essential Characteristics, GE 1973 Taschenbuch zum Röhren-Codex 1948/49


	47: Courtesy Bureau Belper (De Muiderkring, Bussum) Michael Schlör

47: Patrice ZEISSLOFF
Patrice Zeissloff

Variants

47: Telefunken Werkstattbuch
Wolfgang Bauer

47: Sylvania Technical Manual
Peter Hoddow

Usage in Models	18= 1931?? ; 122= 1931? ; 542= 1931 ; 60= 1932?? ; 266= 1932? ; 633= 1932 ; 35= 1933?? ; 36= 1933? ; 159= 1933 ; 22= 1934?? ; 18= 1934? ; 62= 1934 ; 11= 1935?? ; 18= 1935? ; 46= 1935 ; 10= 1936?? ; 8= 1936? ; 8= 1936 ; 1= 1939?? ; 3= 1939? ; 1= 1940?? ; 2= 1942?? ; 1= 1948??
Number of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe): 2082

Variants

Patrice ZEISSLOFF
Patrice Zeissloff

47*indirect heating

47 with Indirect heating 2,5V 1,5A. The cathode ist connected on pin 5 and the grid 1 and grid 3 are connected to pin 3. Perhaps based on a 2A5 with UY5 socket and 47 designation.

24.Apr.2010 Patrice Zeissloff

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