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Aerial guru's what do you think?....

Omegaspeedy

Omegaspeedy

Vinyl and FM lover:)
Hi guys, there are some serious FM listeners here and I'd like to join you. The only problem I have is my new NAT05 tuner is so honest and not as sensitive as some tuners that I think my DIY internal single bipole aerial is letting the team down with a slight graininess or coarseness. The sound stage is nice and big with lots of separation but I can hear that slight dirtiness in the presentation. The reviews of this tuner make it very clear you need a good aerial but you will be rewarded.

I'm thinking of this one....

http://www.supremeantennas.co.nz/view/aerials-antennas/fm-am-aerials/supreme-aerial-7-element-fm.php

I'm about 20stat miles from the transmitters and on the horizon of a hill. My old NAD pulled strong five out of five bars but it was ultra sensitive unlike the Naim. I really want to get rid of any coarseness. Do you think this aerial would do? Is there a difference in 75ohm coax cable that I should look for too?

Thanks James.
 
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Omegaspeedy said:
I'm thinking of this one....
http://www.supremeantennas.co.nz/view/aerials-antennas/fm-am-aerials/supreme-aerial-7-element-fm.php
Click to expand...
I think it’s a very good solution for FM. But don’t forget that this kind of highly directional antennas are very sensitive to accurate orientation. That’s why motor-oriented and manually oriented FM antennas are manufactured for dozens of years.

And as with any outdoor antenna, don’t forget a lightning guard / protection well organized for your antenna. With a lightning rod as high as possible and well grounded! It’s very important.
 
Portkula said:
I think it’s a very good solution for FM. But don’t forget that this kind of highly directional antennas are very sensitive to accurate orientation. That’s why motor-oriented and manually oriented FM antennas are manufactured for dozens of years.

And as with any outdoor antenna, don’t forget a lightning guard / protection well organized for your antenna. With a lightning rod as high as possible and well grounded! It’s very important.
Click to expand...

Thanks Portkula, are these directional antennas so critical that if set to a transmitter, they wouldn't be of any use to another 20 degrees left or right of the main setup? I think this is my case.
 
Omegaspeedy said:
Thanks Portkula, are these directional antennas so critical that if set to a transmitter, they wouldn't be of any use to another 20 degrees left or right of the main setup? I think this is my case.
Click to expand...
Here you can see examples of directivity graphs of directional and sharply directional antennas, see “Directional Antenna” and “High-Gain Directional Antenna”:

http://www.google.com/imgres?imgurl...a=X&ei=Lq2tTY2ZNdHIswbg1NjXDA&ved=0CGsQ9QEwCQ

It means that not only a directional antenna’s useful gain may fall down heavily at 20° or more deviation (in case of a “High-Gain Directional Antenna”), but it may make loose the useful level of the station’s signal “for benefit of” a nearby contaminating signal (noise, interference etc.) that could be situated just in the antenna’s directivity maximum.
 
The -3db beam width of this antenna will probably be around 60 degrees. Or 30 degrees each direction. This means you lose half of your signal at 30 degrees off and then it drops off very quickly beyond that. The overall gain of this antenna at zero degrees is probably around 10db so you will be just short of quadrupling your signal over your little wire dipole when it's pointed accurately.
 
Yep, what Dr Hardy said. My "Dream" is to have a 30-40' tower on the end of my house w/my Winegard & a rotator...I'm in the mountains, which plays havoc w/FM, but occaisionally, you can REALLY catch some incredible FM DX here...I did once about 15 yrs ago w/a TV AM/FM cassette-I was picking up FM stations out of Georgia & the Carolinas...My location is basically in a great valley of the NE Tennessee Appalachians.
 
Well I erected my new antenna in the weekend and it has brought excellent results. On my old Technics ST-8011, I now get full bars on most stations. There is no hiss in the background and I'm very happy. The NAT05 is full, rich and detailed on good transmissions. The neighbors might not like it though but I'm sure they will get used to it:yes:

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