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LF: Off topic

To: LF-Group <[email protected]>
Subject: LF: Off topic
From: Dick Rollema <[email protected]>
Date: Thu, 10 Mar 2005 19:25:49 +0100
Reply-to: [email protected]
Sender: [email protected]
TYo All from PA0SE

I am presently writing an article for our VERON magazine Electron  on the early radio experiments by Marconi. In these experiments spark gaps played an important role. Because I would like to perform some simple calculations on the peak power radiated by a spark transmitter I am looking for data on the break down voltage of spark gaps, consisting of two spheres.
In literature, found on the Internet, 75kV/inch is quoted but it is not stated whether this is between points or spheres and that makes a lot of difference.
Temperature and air pressure also influence break down voltage but I will forget about that, reckoning with "normal" conditions  of,
say , 20 degrees centigrade and  1000 hectopascal or whatever as reckoned as standard  barometric pressure.
Your help will be very much appreciated.

73, Dick, PA0SE
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