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Thanks Alan , John.
Yes that seems to be the solution , may
be a ball would do the same thing ?.. I
was wrangling with the charge distribution angle .. as to the
best way , assuming a sharp point on the ring
would still produce the same corona ?
The double stacked ring
looked a good idea , but is only in 'one
plane' what happens at 90 deg ie in
front and behind ... ?
The tube has possibilities, I have some
copper brake pipe , that should do the job
....
Pity to quench it, it looks
quite impressive in the night !
, (not sure what its doing to the local
medium wave reception though...)
tnx - G..
Sent: Wednesday, March 02, 2011 8:32 PM
Subject: LF: Corona Discharge - how to prevent ?
Corona Discharge - how to prevent
?
Running into corona problems
with a small loaded antenna , terminating as
a wire at the far end
Q has any one addressed this
problem and found a suitable solution ?
Apparently more prevalent on 136
khz , this is presenting on 500k , I can find
reference to rounded objects and rings , one being
two sets of ring's the second being insulated
to reduce the v/mm stress , but these where part of
a high voltage insulator with the far end
earthed , not so in this case, the wire ends in
free space ..
Increasing the surface area
will distribute the charge , but will not
reduce the stress as this is a generated field as
opposed to a static build up ?
Links / ides ?
Tnx - Graham .
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