Primal Ambrose Fleming Tube

ID: 195291
? Primal Ambrose Fleming Tube 
21.Jul.09 23:51
0
Mario Coelho (P)
Articles: 454
Count of Thanks: 6
Mario Coelho

Dear Radiophiles

I have here a picture of the primal tube. It is in a front page of a Portuguese publication (Boletim CEC Mars/April 1969).

The title in the bottom is : "Prof. Ambrose Fleming's original thermionic tube in 1904".

I think we have not this  image in Rmorg pages. Do you think that is important to open a page for it  and to upload this image after that?

Mario Coelho

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 2
Fleming_01 
22.Jul.09 00:35
Roy Johnson (GB)
Articles: 284
Count of Thanks: 9

Dear Mario,

Many thanks.   I have added it as Fleming_01.

The picture on the cover seems to be a photograph from the London Science Museum that also appeared in "Vintage Radio" and other publications, although rotated.    

  I have added a new colour picture from the Science Museum.

The caption to the picture reads:-

The invention of the thermionic valve in 1904 by John Fleming at the Marconi Company was a significant development for electronics and radio communication. The first transatlantic radio transmissions of 1901 threw up a significant problem: how to detect the incredibly weak radio signals at the receiving end. Fleming, inspired in 1904 by a 'sudden and very happy thought', turned to modified experimental filament lamps which he had investigated earlier, and found that they detected the high-frequency signals. His invention was a diode, the first in a line of devices which were to be a mainstay of electronics well into the solid-state era.

Please add any further information.  Very many thanks for raising this.

Regards,  Roy

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 3
more pictures at marconicalling 
22.Jul.09 17:39
Nikolaus Löwe (D)
Articles: 221
Count of Thanks: 11
Nikolaus Löwe

Dear friends,

the pictured tube is in the posession of the Marconi Corporation. More pictures of it and two other, similar specimens can be found under www.marconicalling.com

This web site is outstanding in design as well as depth of content. Check it out!

Yours,

Nikolaus

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 4
Very good original Fleming's tubes 
24.Jul.09 22:26
Mario Coelho (P)
Articles: 454
Count of Thanks: 13
Mario Coelho

 

Thank you Roy and Nikolaus for your kind replies.

I had not seen yet the Fleming_01 im Rmorg. Now I had. It is very  good indeed.

The marconicalling.com website is  an outstanding site.

Thank you very much.

Best Regards

Mario

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