Hi Wolf,
What keeps the triangle in the air? A tower or (3) trees?
If you have a vertical part of 25m and 3x20m horizontal, you could have
somewhat about 450 pF and would need abt 700 mH. Then i would take the same
wire as Markus and i do: 0,4mm diameter enamelled copper wire. It depends on
the money and the space you can spent for that coil! Bigger wire is higher Q
but also bigger dimensions, of course. Befor you begin to wind a coil think
about the HV problems due to rain. You need a water shielding! For "smaller"
tests Markus's plastic pots are well suited and can handle at least 30 kV, as
it seems. But if you have low losses and a higher L and QRO, 30 kV is nothing
;-)
If you have a tower and 2kW and suited wires at the top load (maybe a ladder
line is better than tiny single wires, just like in the german 220kV systems in
energy distribution to handle the corana...) you could reach 50kV or 80kV
(rms). If you have a tower, is it insulated at it's bottom? You would need at
least 50cm creepage distance at a ceramic insulator if you want to transmit at
any wx.....
73, Stefan
________________________________
Von: [email protected] im Auftrag von Wolf Ostwald
Gesendet: Fr 11.06.2010 18:36
An: [email protected]
Betreff: LF: again more from loaded aerial
Hi Stefan !
Bad luck with the car - hope it`s an easy fix.
Well, I am going to construct the Vertical with the topload later.
The topload is a triangle with a sidelength of about 20m, then from each corner
there are wires going to the center of the triangle, that's where they meet and
where the vertical wire drops down about 25m- do You have a notion what the
overall capacity would be like ?
What size of coil wire do you recommend ?
I think the antenna I am building must be close to Markus` design ?
73 de wolf
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