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Bob,
I have now had a chance to do a bit more
modelling.I tried an aditional "droopy"
top wire with the followihg
results:-
1) No change in R.Res!
2)Change in Xc from 2600 to 1900
ohms.
I suppose this is what could be expected,and no
doubt further top wires would produce a further increase in
"C".There will be secondary effects of course reduction in coil loss
and reduction in voltage on vert. part of ant which may help if nearby objects
etc.However its a lot of wire to keep up Hi and only a small improvement.If the
"droopy wires were taken to a spreader at the centre of the ant. they could
be kept under control! So thanks for the idea,but I guess we have to keep on
looking. 73s Laurie.
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