Topband: W1WCR Beverage book

[Doug Waller]

> > He claims that for 1.8 mHz and above, the ground systems at each end
> > of the antenna should be bonded together with an insulated wire lying
> > on the ground directly under the antenna wire for its entire length.
> > This seems contrary to anything else I have ever read about Beverage

If ground is excellent, reduced wavefront inclination deminishes signal
strength received.  A steel wire(s), or coiled copper wire under the
Beverage length could likely increase inclination by slowing propogation, in
this case,  just as poor earth does.

> > He recommends sloping each end of the antenna to reduce
> > pickup from the vertical drop.  Don't you have exactly the same
>
> Think of a K9AY loop, or a Pennant antenna. They act like two close-
> spaced verticals even through they have sloped wires. Both ends of
> the Pennant actually have almost perfectly equal vertical response,
> and look at the great difference in their slope!

Lets not be too hasty to discount the sloped ends effect.  A sloper antenna
receives best in the direction of the slope.  A vertical drop receives well
from all directions....a perfect "manmade noise" antenna.  The fact that a
29 ft Flag has 4.61 dB more gain than a 29 ft Pennant makes sloping Beverage
ends even more compelling.

> > With any antenna of this kind, including the K6STI
> > loop, the flag, ewe, etc., the recommendation is always to use a
> > transformer with separate primary and secondary

Choking the coax at the feedpoint is the effective method at a
balanced-to-unbalanced point, to curtail coax outer shield pickup.  See
ON4UN, page 7-19 for choke & independent ground specifications.  The 100
ferrite beads may be substituted by coiled coax, or mini coax wrapped around
a choke core.

My recommendation is to Never pass up an opportunity to lower your received
noise level on TopBand.

73 & TY/EA9 DX, om Doug / NX4D