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Hello Dick,
between a peak and a plate it takes 1
kV.
Between two balls ( diameter?) - spheres - abt 3
kV. per mm. Don't ask me for kV/m.
73 Peter, dj9dw.
----- Original Message -----
Sent: Thursday, March 10, 2005 7:25
PM
Subject: LF: Off topic
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
JN22GD
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