Antique radios, Old Time Radios

UCH21

Country:	Netherlands	Brand:	Philips; - Eindhoven; Netherlands
		Developer:	Philips; - Eindhoven; Netherlands
		Tube type:	Triode-Heptode Universal Controlling (mu)

Tube ID = 285


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Identical to	UCH21 = UCH71
Similar Tubes	Other base: UCH4; UCH5
First Series	Jan.1941 Tube leaflet collection E.Erb Analysis by original leaflets (P11)
First Source (s)	Jan.1941 : Philips-Archiv
Predecessor Tubes	UCH4 CCH2 CK3
Successor Tubes	1948 UCH42 UCH81 UCH41

Base	Loctal-8, B8G (Sylvania, 1938) (Codex=Vao)
Filament	Vf 20 Volts / If: 0.1 Ampere / -: Indirect / -: Series, AC/DC /
Tube prices	3 Tube prices (visible for members only)
Literature	Taschenbuch zum Röhren-Codex 1948/49


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

Own collection
Eduard Abfalterer

Variants

RTT Schwandt
Günther Stabe

RVF-Röhrenbuch-M1,1947
Anonymous 15 Collector

Usage in Models (calculation each 25th of the month)

5= 1941?? ; 7= 1941? ; 47= 1941 ; 4= 1942?? ; 1= 1942? ; 36= 1942 ; 1= 1943?? ; 4= 1943? ; 28= 1943 ; 2= 1944? ; 39= 1944 ; 1= 1945?? ; 7= 1945? ; 15= 1945 ; 3= 1946?? ; 4= 1946? ; 35= 1946 ; 4= 1947? ; 31= 1947 ; 6= 1948?? ; 5= 1948? ; 52= 1948 ; 1= 1949?? ; 4= 1949? ; 69= 1949 ; 5= 1950?? ; 4= 1950? ; 33= 1950 ; 1= 1951?? ; 5= 1951? ; 20= 1951 ; 1= 1952?? ; 24= 1952 ; 3= 1953?? ; 2= 1953? ; 8= 1953 ;

Number of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe): 541

Variants
collection JR Jacob Roschy	UCH21*Pumpstutzen oben Bekannte Marken: Siemens und Triotron. 23.Feb.2009

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UCH21

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UCH21

Variants

UCH21*Pumpstutzen oben

UCH21