Re: Seibt: Visualizing Standing Waves on a Resonator by Corona

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Original poster: Ed Phillips <evp@xxxxxxxxxxx>

"A similar effect can be observed at higher frequencies too. See
the classical experiment of the "Lecher wires". With enough voltage
for excitation (connect the wires in parallel with spark gap), the
effect appears as corona across the wires.

Antonio Carlos M. de Queiroz"

	Has anyone ever put enough power into a RF transmission line to
actually see corona?  That would represent a lot of peak power.  VHF
radar transmitter maybe.

	I once tried to do something similar by placing a wave guide in a
vacuum jar and back filling with neon.  Thought it might be possible to
see standing waves and waveguide moding, but the impedance of the
ionized gas was so low as to render the experiment unworkable.  A better
experiment design might have worked.

Ed