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B443N Tube

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Forum » Valves / tubes - Semiconductors » VALVES/TUBES / SEMICONDUCTORS in RADIOMUSEUM » B443N Tube
           
Ottó Jancsek
Ottó Jancsek
 
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09.Aug.21 19:22
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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 

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Jacob Roschy
Jacob Roschy
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11.Aug.21 09:06
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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,
Jacob

Wolfgang Holtmann
Wolfgang Holtmann
Editor
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11.Aug.21 10:31
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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

This article was edited 11.Aug.21 12:45 by Wolfgang Holtmann .

Jacob Roschy
Jacob Roschy
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12.Aug.21 09:45
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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,
Jacob

Wolfgang Holtmann
Wolfgang Holtmann
Editor
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12.Aug.21 11:04
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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:
Later on, Philips produced the improved EL3N but often left out the letter "N".

 

 
 

 

  
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