Topband: Circle arrays

[donovanf at starpower.net]

Hi Dave, 


In order to get benefits from diversity your 8-circle needs to be very 
far away from your Beverages. If they are separated less than 500 feet 
the fading will be nearly perfectly correlated and there will be no 
diversity effect. 


I get excellent diversity performance with my Beverages or BSEF 
8-circle array operating with my 4-square transmitting array 
1000 feet away. 


Good luck! 


73 
Frank 
W3LPL 


----- Original Message -----

From: "David Olean" <k1whs at metrocast.net> 
To: "W0MU Mike Fatchett" <w0mu at w0mu.com>, topband at contesting.com 
Sent: Wednesday, October 16, 2019 4:30:30 PM 
Subject: Re: Topband: Circle arrays 

TNX Mike 

That is the crux of the situation. I am not so interested in other 
bands but was wondering how much I would lose on 160 with a multi band 
design. I don't want to lose much at all! 

My brother who is a ham thinks I am crazy to even contemplate a circle 
array. My goal is to use the circle array as a diversity antenna with 
my beverages used on the other receive channel. I believe it will be a 
good choice. He thinks my beverages are just fine, but I believe that a 
diversity setup will be a big jump in performance. I sure hope I am 
right!! It is a lot of work. 

Dave K1WHS 

On 10/15/2019 6:51 PM, W0MU Mike Fatchett wrote: 
> If your joy is 160 then go with the array that will maximize the 
> results. Multiband arrays are going to be compromise and degrade your 
> 160 performance. You need to determine what is more important. You 
> still might be able to use a 160 array on the other bands but not 
> optimally. 
> 
> W0MU 
> 
> On 10/14/2019 8:34 AM, David Olean wrote: 
>> I am pondering an eight circle array. At present my only ham band 
>> that I am QRV on is 160 meters. A few years ago I had 28 thru 24 GHz 
>> all percolating, but the maintenance was killing me. i was a slave to 
>> the station. Now I am having fun! Rather than tweaking with noise 
>> figure meters and VNAs, I now do all my work with wrenches and chainsaw. 
>> 
>> There are several choices for 8 circle arrays. My question is how 
>> much benefit would I get from the single band version as opposed to a 
>> dual or three band choice? Reading the hype is always fraught with 
>> danger. Practical experience is always better. My thinking is that 
>> if there is a distinct advantage, I would go with a 160 only setup 
>> and forego the other bands. I can carve out a 200 ft circle with a 
>> little chainsaw action. I have about 180 ft of field available now, 
>> so can get the room with not too much trouble. 
>> 
>> I also better hook up my 160 transceiver quick. It is still packed 
>> away from Field Day!! 
>> 
>> Comments? 
>> 
>> 
>> Dave K1WHS 
>> 
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