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G0TEZ > TECHNI 08.09.05 00:34l 21 Lines 713 Bytes #999 (0) @ WW
BID : 512-GB7FCR
Read: DJ4KI GUEST DL1LCA OE7FMI
Subj: Re: Why vacuum tubes
Path: DB0FHN<DB0MRW<OK0PPL<DB0RES<DK0WUE<GB7FCR
Sent: 050907/2225Z @:GB7FCR.#16.GBR.EU #:512 [Blackpool] FBB-7.03a $:512-GB7FCR
From: G0TEZ@GB7FCR.#16.GBR.EU
To : TECHNI@WW
Hmm..Yes, I see your point,Patrick. Convection could be a problem without
the modern materials used in modern gas discharge bulbs.
It is a matter of record that Joseph Swann did experiment with inert
gasses at low partial pressures while Edison stayed with a pure vacuum.
When Edison claimed to be the inventor of the electric light, which many
Americans still think he is, Swann heard about it and the result was a
court case. Out of this came the firm of Ediswan - Mazda, which also made
radio valves. i don't know if you are old enough to have seen Ediswan
Mazda valves but I remember them.
73 - Ian, G0TEZ @ GB7FCR
Message timed: 23:54 GMT on 2005-Sep-04
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