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ID = 53758
Brand: Philips; Eindhoven (tubes international!); Miniwatt
Developer: Philips; Eindhoven (tubes international!); Miniwatt 
Tube type:  Vacuum Pentode   Power/Output 
  Ca. 1925 up to 1945 rare.
Identical to B443_UX4pin
Similar Tubes
Other base:
  B443 ; B443_3SC ; B443_4pin

Base UX-Base (4 Pins (2 thick, USA 1924, UX) Sidecontact.
Was used by Radio/TV-reception etc.
Filament Vf 4 Volts / If 0.15 Ampere / Direct / Specified voltage AC/DC

Output pentode, on market Sept. 1927
Equivalent types: RES174d (Telefunken), L415D (Valvo), PP415 (Tungsram)
Successors: B443S, L416D, RES164
The B443 is the first produced output pentode of the world, introduced by Philips in September 1927. It's amplification and its power output was much higher as with an output triode of equal size. The B443 has established the replacement of output triodes by multiple-grid output tubes. The equivalent Telefunken type RES174d appeared in 1931.
[Jacob Roschÿ, 2003-Jan-14]

Text in other languages (may differ)
Dimensions (WHD)
incl. pins / tip
50 x 105 x 35 mm / 1.97 x 4.13 x 1.38 inch
Information source - - Manufacturers Literature   
-- Collector info (Sammler)   

b443-c643-d243ux4base_2.png B443_UX4pin
Peter den Boer

Just Qvigstad
B443_UX4pin: Philips Röhren Daten 1933
Peter Hoddow

More ...
Usage in Models 1= 1929 ; 2= 1930 ; 1= 1931

Quantity of Models at with this tube (valve, valves, valvola, valvole, válvula, lampe):4

Collection of



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