Several years ago WA2WVL had a really nice lecture on 80m long-boom
inverted-V Yagis at the Dayton Antenna Forum. It's been on my bucket list
ever since.
An important safety aspect of these antennas is to make sure the
terminations are on posts well above head level of people and wildlife.
73, Scott W3TX
On 9/15/15 6:01 PM, "Ed Sawyer" <sawyered@earthlink.net> wrote:
>Yes, a number of them over the years. They do have nice gain and are
>simple
>in concept.
>
>
>
>However, a few points to remember:
>
>
>
>- The gain is VERY narrow. A 4 wavelength long legs V Beam
>probably has a 25 - 30 deg beamwidth and it VERY sharp on the drop offs
>and
>side rejection is HUGE, so you will be loud to the target area but that's
>it.
>
>- Its harder than it seems to align the legs over 300+ feet with
>any kind of trees.
>
>- The impedance at the feed is complex. Easiest to feed it with
>open wire line and use a tuner at the rig.
>
>- The wire has to be high (like a yagi or dipole) in order to
>have
>the gain at a good take off angle. Doing that for 100s of feet x 2 legs
>can
>be difficult.
>
>
>
>But if the challenges are known and can be executed, it's a fun antenna.
> A
>STRONG player to the target area when done right.
>
>
>
>Ed N1UR
>
>_______________________________________________
>
>
>
>_______________________________________________
>TowerTalk mailing list
>TowerTalk@contesting.com
>http://lists.contesting.com/mailman/listinfo/towertalk
_______________________________________________
_______________________________________________
TowerTalk mailing list
TowerTalk@contesting.com
http://lists.contesting.com/mailman/listinfo/towertalk
|