Antique radios, Old Time Radios

21TH8

Country:	Hungary	Brand:	Tungsram; Budapest (see also British T.)
		Tube type:	Triode-Hexode Frequency converter
			Late but very rare. ***

Tube ID = 3665


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Identical to	21TH8 = TX21
Similar Tubes	Heater different: 6TH8 Other base: CCH1
First Source (s)	Apr.1937 : Histoire de la lampe de radio
Successor Tubes	1939 ECH3

Base	Octal (Int.Octal, IO) K8A, USA 1935 (Codex=Ua)
Was used by	Radio/TV-reception etc.
Filament	Vf 21 Volts / If: 0.2 Ampere / -: Indirect / -: Series, AC/DC /
Literature	Histoire de la lampe de radio Taschenbuch zum Röhren-Codex 1948/49


	Internet Miguel Angel Trujillo-Rodriguez

W.Sprick: Austausch-Röhren-Lexikon 1947
Günther Stabe

Usage in Models (calculation each 25th of the month)	1= 1937 ; 2= 1938 ; 3= 1939 ; 1= 1941 ;
Number of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe): 7

No further Information for

21TH8

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