Antique radios, Old Time Radios

B443

ID = 1670

Country:

Netherlands

Brand:	Philips; Eindhoven (tubes international!); Miniwatt
Developer:	Philips; Eindhoven (tubes international!); Miniwatt
Tube type:	Vacuum Pentode Power/Output

Identical to

B443 = LL415 = ME4_362 = R79_5pin = W443 = 425PT = 415QD = 415PT = PP415 = DX3 = J43 = 3P4 = B443O

Similar Tubes

Other shape (e.g. bulb type):

B443K ; B443N

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

Differences not known by us:

415PP

First year

Sep.1927 Tube leaflet collection E.Erb Analysis by original leaflets

Predecessor Tubes

B443_4pin

Successor Tubes

1929 C443 RES164 PP430 B443N

Base

Europe 5-Pin , B5 (Eu O, F, O5A) 1928 (Codex=Foo)

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)

Dimensions (WHD)
incl. pins / tip

x 103 x 50 mm / x 4.06 x 1.97 inch

Tube prices

4 Tube prices (visible for members only)

Information source

- - Manufacturers Literature
L'ABCDaire des lampes de TSF des jeunes années p. 43
Babani, International Radio Tube Encyclopaedia
Taschenbuch zum Röhren-Codex 1948/49

B443: Philips Innfo Willy De Grande
B443: Telefunken Werkstattbuch Wolfgang Bauer	Just Qvigstad	B443: Philips Röhren Daten 1933 Peter Hoddow More ...

Usage in Models

2= 1927?? ; 3= 1927? ; 12= 1927 ; 6= 1928?? ; 13= 1928? ; 35= 1928 ; 9= 1929?? ; 12= 1929? ; 49= 1929 ; 8= 1930?? ; 8= 1930? ; 58= 1930 ; 4= 1931? ; 42= 1931 ; 3= 1932? ; 21= 1932 ; 1= 1933?? ; 1= 1933? ; 6= 1933 ; 2= 1934? ; 3= 1934 ; 1= 1935?? ; 1= 1935? ; 3= 1935 ; 2= 1936 ; 1= 1937?? ; 1= 1937? ; 1= 1937 ; 1= 1938?? ; 3= 1938 ; 1= 1940?? ; 1= 9999

Quantity of Models at Radiomuseum.org with this tube (valve, valves, valvola, valvole, válvula, lampe):314

Museum "Philips museum"

Museum "Philips Historische Producten"

Collection of

Alan Scott Douglas † 16.11.15 (USA)

Peter Steffen (CH)

Patrice Zeissloff (F)

Jacky Parmentier (F)

Justo Puertas-Paule (E)

B443

Forum contributions about this tube

B443

Threads: 2 | Posts: 8

Hits: 1008 Replies: 4 B443N Tube
Ottó Jancsek 09.Aug.21	1 B443N Tube Hi, I have a B443N. See the attachment. I haven't found a page for it. Did I miss something? Best regards, Ottó Attachments IMG_20210809_182630 (291 KB)
Jacob Roschy 11.Aug.21	2 B443N Tube Hi Ottó, a B443N is nowhere mentioned and its meaning is unknown, perhaps it is due to its vertical structure. A page for it is now created. Best Regards, Jacob
Wolfgang Holtmann 11.Aug.21	3 B443N Tube Good morning Ottó and Jacob I started an inquiry in the Dutch Radio-Forum about this tube. Because the original one was on the market as from 1927, the kind of internal construction was discontinued in the later years. On the other hand, there was still a need for replacement in the older radio sets. So Philips started a new production line, but with a more modern technique. The letter "N" was added which means new, although the electrical performance should be equal to the genuine B443. Regards
Jacob Roschy 12.Aug.21	4 B443N Tube Hello everybody, My assumption was in the right direction, as the vertical structure is a modernised version. At Philips tubes the suffix "N" indicates a new, modernised or improved version of a tube. Best known is the EL3N, an improved version of the older EL3. Today one can find much more EL3Ns then the original EL3. As soon as the EL3N appeared, it has completely displaced the EL3 ! In contradiction to EL3 vs. EL3N is this the first time I saw a B443N ever. The production number of B443Ns must have been quite low. Best Regards, Jacob
Wolfgang Holtmann 12.Aug.21	5 B443N Tube Best known is the EL3N, an improved version of the older EL3. Today one can find much more EL3Ns then the original EL3. As soon as the EL3N appeared, it has completely displaced the EL3 ! In addition to what is said above: Later on, Philips produced the improved EL3N but often left out the letter "N".

Hits: 3935 Replies: 2 B443 (B443)
Gian-Fausto Balestra 29.Jun.07	1 B443 (B443) 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 No subject 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 Valvola B443 Hallo Jacob, Thanks for your observation Best Regards, Gian-Fausto Balestra

B443
End of forum contributions about this tube

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