Hello Steve,
Ed has a point. I used to incorrectly refer to my two-wire,
switchable-direction Beverages as "bi-directional". Removing the far-end
termination resistor from a single-wire Beverage makes them mostly
bi-directional (about a 10 dB F/B).
As for your question # 1, please see
www.w0btu.com/Beverage_antennas.html#Proximity_to_Beverage_antennas
about not sharing the ground between two antennas.
To answer your question # 3, they don't have to be close-spaced. Some of
the best 160 meter stations use 6" (or more) spacing. However, the
transformer impedance ratios have to match the wire size, wire spacing, and
height above ground. Please see
www.w0btu.com/Beverage_antennas.html#How_far_apart
Wide spacing has some advantages, as well as disadvantages.
- Wide-spaced wires probably shouldn't be run one over the top of the
other. And they could be more susceptible to imbalance from nearby metal
buildings, metal fences, etc.
- Narrow spacing requires more spacers; I may try a 12" spaced Beverage
here someday so I don't need any spacers, just supports every 100'.
Please see my Beverage antenna information page at
www.w0btu.com/Beverage_antennas.html
as well as the links there to other Beverage antenna websites.
Whatever material you use will delight you. :-)
73, Mike
www.w0btu.com
On Fri, Nov 6, 2015 at 9:51 AM, Steve Baughn <baughn@centurylink.net> wrote:
> 1) Since these will be running at 90 degree angles to one another, can the
> feed points for both be relatively close to each other i.e. a few feet or
> so or do they need to be farther apart?
> ...
> 3) If I do go with the fence wire as I understand it the spacing should be
> fairly close between the two wires such as an inch or so and mounted about
> 10’ off the ground. I am considering a metsl T post with pvc slid over it
> then holes through each vertical pvc piece to run the wires.
>
>
_________________
Topband Reflector Archives - http://www.contesting.com/_topband
|