Albert H wrote: ↑Sat Nov 26, 2022 3:24 am
The cheapest amplifier is often a better antenna!
Looking at Brian's location, there's little point in transmitting out to sea, so you're immediately looking at a hemispherical radiation pattern. For example:
An "H" (2-element Yagi - radiator and reflector) will give you almost 3dB more than a dipole, and has semi-circular radiation. You can then "stack" these aerials, adding to the radiated power in the direction you want to go. You're going to have to make phasing harnesses (not difficult) and possibly some Pawsey Stubs (unless you go for Gamma Matches).
Also, using stacked Yagis also allows you to "aim" the signal at centres of population, which is something we frequently do in Eastern Europe, Africa, and South America. There's no point in getting a huge signal into a jungle - you want to be hitting the towns and cities!
You can use Yagis with more elements to make them more directional, and to increased the ERP - one installation the lads did recently uses clusters of three and four-element stacked Yagis, with very convoluted matching harnesses. They take a few kilowatts and convert the ERP to almost eight times the transmitter power by using shaped coverage!
Numerous problems with a
BIGGER antenna array.
I want / need
Brian to to be / stay omni directionall.
Even though my main listener area is Playa del Ingles / Maspalomas area.
I have had reports that he is available in many parts of the Arguineguín area so I don't want to lose those listeners.
Many residents and tourists drive up into the mountains at and inform me they are surprised and glad to receive him.
I need to stay as inconspicuous and discreet as possible
Brian is on the main road with the antenna easily visible.
We get incredibly powerful gusty winds some times.
The 1KW
Dominate antenna that I use now only has a wind load of 0.7 square feet.
It has a quoted max wind speed tolerance of 140 MPH.
It has a quoted db gain of 5.15 dbi (3 dbd) - Power gain: 2.
Conclusion: I would like to stay with the
Dominate
Brians Area 3D.JPG
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