I recall that you can get copper cistern ball floats in various sizes,
as large as 12 inches diameter, would that be of any use?
----- Original Message -----
Sent: Wednesday, March 02, 2011 10:26
PM
Subject: Re: LF: Corona Discharge - how
to prevent ?
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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