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B443

Information - Help 
ID = 1670
       
Country:
Netherlands
Brand: Philips; Eindhoven (tubes international!); Miniwatt
Tube type:  Vacuum Pentode   Power/Output 
Identical to B443 = LL415 = ME4_362 = R79_5pin = W443 = 425PT = 415QD = 415PT = 415PP = PP415 = DX3 = J43
Similar Tubes
Other shape (e.g. bulb type):
  B443K
Normally replaceable-slightly different:
  2-443 ; 4B4_Ultron ; 4B6_Ultron ; D100 ; DP2 ; L43m ; L506 ; M1004 ; P420_5pin ; PB4_5pin ; PT415_5pin ; RO4243_5pin ; S_5pin ; T60_Adzam_5pin ; TB43_5pin ; TL414_5pin ; TU415 ; UP4B
Other base:
  410PT ; 415PP_4pin ; 415PT_4pin ; 415QD_4pin ; 4GBF ; B443_3SC ; B443_4pin ; B443_UX4pin ; PT415 ; R79 ; RO4243 ; T60_Adzam_4pin ; TB43 ; TL414 ; TU415_4pin
First year Sep.1927 Tube leaflet collection E.Erb Analysis by original leaflets
Successor Tubes 1929   C443   RES164   PP430  

Base Europe 5-Pin (O5A, B5) (Codex=Foo) Sidecontact
Was used by Radio/TV-reception etc.
Filament Vf 4 Volts / If 0.15 Ampere / Direct / Battery =
Description

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)
Tube prices 4 Tube prices (visible for members only)
Literature Taschenbuch zum Röhren-Codex 1948/49   
  ugebungsschaltungphilipsradio2634.png
  B443: Philips Innfo
Willy De Grande
 
t04a_02_large.jpg
B443: Own collection
Valery Gromov

 
4.png
B443: Telefunken Werkstattbuch
Wolfgang Bauer

 
b443_techdat01.png
B443: Philips Röhren Daten 1933
Peter Hoddow


Usage in Models 1= 1927?? ; 2= 1927? ; 10= 1927 ; 3= 1928?? ; 13= 1928? ; 32= 1928 ; 8= 1929?? ; 7= 1929? ; 43= 1929 ; 7= 1930?? ; 6= 1930? ; 57= 1930 ; 4= 1931? ; 39= 1931 ; 2= 1932? ; 19= 1932 ; 1= 1933?? ; 6= 1933 ; 3= 1934 ; 1= 1935?? ; 3= 1935 ; 2= 1936 ; 1= 1937?? ; 1= 1937? ; 1= 1937 ; 3= 1938 ; 1= 1940?? ; 1= 9999

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):277



Forum contributions about this tube
B443
Threads: 1 | Posts: 3
Hits: 2821     Replies: 2
B443 (B443)
Gian-Fausto Balestra
29.Jun.07
  1

La valvola B443 viene utilizzata anche per il modello 6 della radio Televox_CH 6 anno 1925

Probabilmente la valvola B443  utilizzata nel modello 6 della Televox é stata sostituita all'originale.

Sarebbe opportuno trovare lo schema  o la documentazione  dell'epoca per vdere quali valvole venivano impiegate all'origine. L'apparecchio della mia collezione data del 1925.

Jacob Roschy
29.Jun.07
  2
Hallo Gian-Fausto,

This is impossible, since the B443 was introduced in September 1927.

Best Regards,
Jacob Roschÿ
~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Ciao Gian-Fausto,

questo è impossibile, poiché il B443 è stato introdotto nel mese di settembre del 1927.
Saluti,
Jacob Roschÿ
Gian-Fausto Balestra
17.Dec.08
  3

Hallo Jacob,

Thanks for your observation

Best Regards,

Gian-Fausto Balestra

 
B443
End of forum contributions about this tube

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