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Hits: 1183 Replies: 4
B443N Tube
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Ottó Jancsek
09.Aug.21 |
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Hi, I have a B443N. See the attachment. I haven't found a page for it. Did I miss something? Best regards, Ottó Attachments
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Jacob Roschy
11.Aug.21 |
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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, |
Wolfgang Holtmann
11.Aug.21 |
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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 |
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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, |
Wolfgang Holtmann
12.Aug.21 |
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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:
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Hits: 4107 Replies: 2
B443 (B443)
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Gian-Fausto Balestra
29.Jun.07 |
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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 |
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Hallo Gian-Fausto,
This is impossible, since the B443 was introduced in September 1927. Best Regards, Jacob Roschÿ
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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 |
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Hallo Jacob, Thanks for your observation Best Regards, Gian-Fausto Balestra |
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