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For the DX guys . . . vertical or horizontal wire ??
- Thread starter Billk
- Start date
Shadetree Mechanic
Delaware Base Station 808
I have seen yagi beams that have horizontal and vertical elements so you can switch from one to the other.
Horizontal is the way to go for DX'ing. As mentioned earlier man made noise is mostly vertically polarized. Once the signal bounces the polarization ia pretty much ambiguous.
If for no other reason less receive noise.
If for no other reason less receive noise.
BJ radionut
Supporting Member and 6m addict
I agree with Tallman...90% of the time you will find Horizontal a better choice.
Again noise reduction factor is key. However due to signal bending when reflected back down, you can hear signals in both polarities. I have even heard locals many times use Horizontal. Rag chew groups, locals will use vertical to keep from spinning the beams between stations,
Good choices "Flat" top dipoles or Squalo's (horizontal loops) do very well. Height makes might and squalo's make a excellent choice as they tend to be more "omni" than a dipole, plus work well even at lower heights.
Dipoles are inexpensive and easy to build, so a pair say one East/West and another North/South with a antenna switch give you the ability see which direction the signal is best.
Also "Sloper" type dipoles offer some interesting options when able to switch between them to peak a signal.
Again positioning them different directions around a mast or supported by trees etc.
All the Best
Gary
Again noise reduction factor is key. However due to signal bending when reflected back down, you can hear signals in both polarities. I have even heard locals many times use Horizontal. Rag chew groups, locals will use vertical to keep from spinning the beams between stations,
Good choices "Flat" top dipoles or Squalo's (horizontal loops) do very well. Height makes might and squalo's make a excellent choice as they tend to be more "omni" than a dipole, plus work well even at lower heights.
Dipoles are inexpensive and easy to build, so a pair say one East/West and another North/South with a antenna switch give you the ability see which direction the signal is best.
Also "Sloper" type dipoles offer some interesting options when able to switch between them to peak a signal.
Again positioning them different directions around a mast or supported by trees etc.
All the Best
Gary
Shadetree Mechanic
Delaware Base Station 808
I have heard that vertical antennas are good for ground wave and horizontal is good for sky wave but maybe just a wives tale.
SM, the"wives tale" part is the reference to "ground wave".
what most people call ground wave is really DIRECT wave propagation.
real ground wave is very short, usually not even extending to the visible horizon, depending on the band used.
Indeed. TRUE ground wave is barely existent above 3 MHz. Probably 99.999% of the people misuse that term.
Yes, Circular polarization which is both. Circular polarization is what television use to broadcast on.
https://www.worldwidedx.com/attachments/ezo-jpg.28040/
https://www.worldwidedx.com/attachments/ezo-jpg.28040/
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Shadetree Mechanic
Delaware Base Station 808
Copper has a circular phasing harness to turn horizontal / vertical beams to circular polarization. I am not sure if it would reduce the effective radiated power? If the receiving station was only horizontal or only vertical, then they would only get half of the power you are transmitting.
https://www.copperelectronics.com/c...ntenna-Accessories/CPH-1-Polarization-Harness
But then the question becomes left-hand circular or right-hand circular?
OK so it's not really an issue on HF like it is on VHF but I had to mention it.
It cuts the power delivered to each polarity by 3 dB however the advantages of greatly reduced fading due to polarity shift is GREATLY reduced.
That's not circular polarity. That is like a quad but with circular elements which according to theory raises the efficiency a tiny bit by using the geometric shape that covers the most area. It is still vertical or horizontal depending on where the feed point is located. Similar yagis are used on UHF and above and are called loop yagis or ring yagis.