On Mon, 5 Dec 2005 14:02:03 -0600, "RB"
wrote:

Oooopss----I meant coax fed.


Did you really?

It is unlikely that your proposed antenna system (140' dipole + bal un
+ coax) feed will provide acceptable losses on many bands, possibly
only one band.

You have given almost no detail of the antenna (and a key element of
the detail was in error), so it is hard to give more a more exact
information.

If you hadn't mentioned the feed line type, readers would probably
have sensibly assumed open wire feed as it is much more likely to be
feasible than coax feed of such a multiband dipole.

The article at www.vk1od.net/LOLL/index.htm shows in Fig 1 and Fig 1a,
antenna system losses for an antenna system comprising a low 66'
dipole and coax feed over HF. Your 140' (I am not sure why you didn't
nominate 133' which would be resonant on 80m for simplified / lower
loss coax feed) would be very roughly a frequency scaled version of
the same thing.

Owen
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