Steve (et al): FWIW -- I have used a sloping Vee antenna for a number of
years on 30m and below with mixed results. It is balanced, fed with 460
ohm "window" line. The balun in my MFJ-989C got hot at QRO, and
bringing the open-wire line into the shack was a disaster at anything
over about 50W (keying the irrigation sprinkler valves was one of the
disasters) I finally used EZNEC-4 and TLW (N6BV's nifty transmission
line program in the 20th ed. ARRL Antenna Book) to find leg and feedline
lengths that, with a 4:1 DX Engineering balun at the end of the
open-wire line, gave me acceptable SWR on the coax into the shack. It
worked so well that I worked out a portable version for my K2 and KX1
with a smaller HB balun and the ATU's handle it just fine on all bands.
The DXE balun is a 10KW current balun with insulation up to a 12KV or
more, and seems to be very efficient (and cold) even with a KW.
I really would stay away from any unbalanced antenna if you can (except
possibly the random end-fed wire with counterpoise radial I sometimes
use with my KX1 when I can't get the dipole up).
As I said, FWIW
Fred K6DGW
Auburn CA CM98lw
Mike Morrow wrote:
I guess my question is: Why choose this type of antenna?
Baluns of any type especially warrant avoidance if losses
> are of concern.
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