Circular Dipole

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Banus_radio
no manz can test innit
no manz can test innit
Posts: 124
Joined: Wed Aug 24, 2016 9:58 pm

Circular Dipole

Post by Banus_radio » Sun Dec 11, 2016 6:18 pm

Anybody seen this?

http://www.ebay.com/itm/FM-Broadcast-Ci ... 2043382691

If anybody has measurements i would be very interested

Albert H
proppa neck!
proppa neck!
Posts: 2957
Joined: Tue Apr 05, 2016 1:23 am

Re: Circular Dipole

Post by Albert H » Sun Dec 11, 2016 10:53 pm

FFS! These are designed to be stacked and to give "circular" polarisation. The have a loss of about -4dB per aerial against an ordinary dipole. There was a theory (long since discredited) that they gave better signal penetration and lower multipath distortion than ordinary vertical polarisation.

I was forced to use three 8-bay aerial systems with these useless efforts on a station in California. We were running 200kW on one of the sites and 50kW on the secondary "fillers". We had a major power outage and I got us back on the air with a single 10kW rig into a pair of 4-stack vertical dipoles and got better coverage at lower power from a single site. The station fired their "Senior Engineer" the next day!

The clown had bought into the bogus concepts of circular polarisation and had cost the station nearly half a million Dollars that they didn't need to spend!

Stick with simple aerials that we all know that work properly. If you want to conceal your aerial, use a vertical that looks like a CB job!
"Why is my rig humming?"
"Because it doesn't know the words!"
;)

Banus_radio
no manz can test innit
no manz can test innit
Posts: 124
Joined: Wed Aug 24, 2016 9:58 pm

Re: Circular Dipole

Post by Banus_radio » Sun Dec 11, 2016 11:32 pm

Ok Albert ill take the advice, thankyou

I see your friends at Arreff are selling them to hehe

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