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The thermionic valve is one hundred years old this week.

Happy Birthday

d
Pearce Consulting
http://www.pearce.uk.com

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The thermionic valve is one hundred years old this week. Happy Birthday

Hello Don - very interesting! Can you elaborate on what exactly happened 100
years ago? Andy

=== Andy Evans ===
Visit our Website:- http://www.artsandmedia.com
Audio, music and health pages and interesting links.

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On 11 Nov 2004 16:11:58 GMT, ohawker (Andy
Evans) wrote:

The thermionic valve is one hundred years old this week. Happy Birthday

Hello Don - very interesting! Can you elaborate on what exactly happened 100
years ago? Andy


The first diode valve happened. It was a development of the light
bulb.

d
Pearce Consulting
http://www.pearce.uk.com

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In article ,
Andy Evans wrote:
The thermionic valve is one hundred years old this week. Happy Birthday

Hello Don - very interesting! Can you elaborate on what exactly happened
100 years ago?

It arrived from an attempt to find out why carbon filament bulbs running
on DC got blackened more on one side than the other. A metal plate was
introduced to attempt to investigate/cure this, and it was noticed that
current was flowing from it.

--
*I'm not your type. I'm not inflatable.

Dave Plowman London SW
To e-mail, change noise into sound.

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On Thu, 11 Nov 2004 16:08:44 GMT, (Don
Pearce) wrote:

The thermionic valve is one hundred years old this week.

That depends on who you believe invented it..............

--

Stewart Pinkerton | Music is Art - Audio is Engineering

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On Thu, 11 Nov 2004 18:23:29 +0000 (UTC), Stewart Pinkerton
wrote:

On Thu, 11 Nov 2004 16:08:44 GMT, (Don
Pearce) wrote:

The thermionic valve is one hundred years old this week.

That depends on who you believe invented it..............

Well, everybody was at it around then - it was really a question of
who cottoned on to the significance first.

d
Pearce Consulting
http://www.pearce.uk.com

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"Stewart Pinkerton" wrote in message

On Thu, 11 Nov 2004 16:08:44 GMT, (Don
Pearce) wrote:

The thermionic valve is one hundred years old this week.

That depends on who you believe invented it..............

If you attribute it to Guthrie than its 100th anniversary was in 1973. If
you attribute to Edison, then it was 100 years old in 1880. If you attribute
it to Richardson who won a Nobel prize related to it, then you've got about
19 years to go.

Fleming patented his related discovery the diode, in 1904.

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"Arny Krueger" wrote
If you attribute to Edison, then it was 100 years old in 1880.

!!!


Martin
--
M.A.Poyser Tel.: 07967 110890
Manchester, U.K. http://www.fleetie.demon.co.uk

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"Fleetie" wrote in message

"Arny Krueger" wrote
If you attribute to Edison, then it was 100 years old in 1880.

!!!


Correction: 1980

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In article ,
Arny Krueger wrote:
If you attribute it to Guthrie than its 100th anniversary was in 1973.
If you attribute to Edison, then it was 100 years old in 1880. If you
attribute it to Richardson who won a Nobel prize related to it, then
you've got about 19 years to go.

Fleming patented his related discovery the diode, in 1904.

The radio today reckoned Edison commissioned Fleming to find out why a
carbon filament lamp coated the inside of the glass. And this led to the
discovery that adding a metal plate cause a current to flow in it.

The bean counters often get the credit. ;-)

--
*Time is the best teacher; unfortunately it kills all its students.

Dave Plowman London SW
To e-mail, change noise into sound.