You thinking of going into Pawnbroking Tracey :-))
Alan
----- Original Message -----
From: "Tracey Gardner" <[email protected]>
To: <[email protected]>
Sent: Wednesday, March 02, 2011 10:59 PM
Subject: Re: LF: Corona Discharge - how to prevent ?
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?
Regards
Tracey
----- Original Message -----
From: Graham
To: [email protected]
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..
From: Graham
Sent: Wednesday, March 02, 2011 8:32 PM
To: [email protected]
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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