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Antenna
This forum provides help with antenna installation, as well as guidance on selecting the right antenna for your radio or mobile setup.
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Re: Antenna
Post by MDYoungblood »
You wouldn’t be able to use the 4 ground plane elements as it would detune the beam. You might be able to use the vertical but it will take some trail and error tuning as the beam wouldn’t be in the proximity of where the ground plane was. I have seen op’s use an Antron or Solarcon above a horizontal beam.
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Re: Antenna
MDYoungblood is right. It would be best to choose an antenna that doesn't come with or require radials. If you want to use radials, you would need to get them out of the near field of the yagi, which would require about two wavelengths (or 72 or so feet) or more.
On the other hand, if you have a vertical that doesn't have any radials, you can get away with a few feet. Four or five would be enough.
If you want to run that Maco without the radials, you will need to do some major tuning, the radials are a significant part of the matching circuit, and the existing circuit simply won't work as it does without them.
The DB
On the other hand, if you have a vertical that doesn't have any radials, you can get away with a few feet. Four or five would be enough.
If you want to run that Maco without the radials, you will need to do some major tuning, the radials are a significant part of the matching circuit, and the existing circuit simply won't work as it does without them.
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Re: Antenna
I have just set up my Sirio 4-element beam with a Sirio 827 5/8 wave vertical. I removed all radials except for two and bent them down slightly and attached them to the main boom with hose clamps. This gives the proper electrical characteristics and also gives extra support to the main boom of the beam. Both antennas tune perfectly.
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Re: Antenna
Post by MDYoungblood »
Sounds like a good setup. I believe the 827 is capacitive tuned so it could be installed without the radials, the elements on the beam is a plus.
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