I installed my pixel loop on my house roof yesterday and I am very impressed with its ability to pull signals out of the noise on 17 and 20 meters now compared to my mono band resident wire antennas. It was previously useless on these 2 bands at 10 feet off the ground.
It's ironic that you should do this the same day as I did..
Here is my Pixel Loop sitting on a PVC tripod in the backyard
Hear somethings, about 20% uniques but nowhere near as effective as my SteppIR MonstIR
Here is the Ocean View from my 50' vertical backyard hill with the MonstIR below us nested at 27', a 160-10M Dipole and several VHF/UHF Antennas on the roof..
I had recently cut down the top 2/3 of a 60' pine tree on my hill leaving a perfect 20' antenna mast tree trunk
So we used some Radio Shack (RIP) Chimney Mount to mount the very light (only 3 lb)
and tiny Pixel Loop on the tree trunk that used to support 1,000's of Lb of tree branches..
Here is the final look
Turns out that by bypassing the internal (BC-30MHz) LNA, the Loop is actually a good TV antenna..
I did some experimentation using the Loop today and I was surprised to see all sorts of Local TV Channels ( usually the Subchannels e.g 8-1, 8-2, etc) which I never get on cable TV, That turned out to be a very desirable Free bonus - hard to say no to Free...
Magnetic loops are supposed to be mounted within 10' of the ground..
How does it play at 20' .. significantly better than when it was mounted on the ground
Why.. its pretty obvious that the 50' hill behind my house really blocks the magnetic loop..
Height fixed it - YMMV.
Bottom Line: Even if it does not get anywhere as much use as a diversity antenna as my MonstIR main beam, it will definitely be used all the time as a TV Antenna... In fact, i have had TV antennas before which were swamped by RFI from the 18 local TV towers 2,900' away which forced me to use cable TV if I ever wanted to see TV... this antenna seems to be immune to that RFI.
Searching about loops I found this http://www.wellbrook.uk.com/Loop_Antennas
They are cheaper to buy and to ship to Barbados. Anyone, by any chance has had any experience with the Wellbrooks?
Adds about 1/2 lb so it's not an issue
The first is a paper from Pixel claiming theirs is better
This is a paper favoring wellbrook
Each was written by the respective companies. Both purport scientific evidence that their competitor is crap.
Bottom Line: likely not much difference between them
No filters on my main antenna. It's a SteppIR MonstIR so it is always tuned to the correct frequency.
I decided that I wouldn't notice any difference. It came down to delivery time/cost and the fact that I had some US$ and avoided another currency change.
Small problem with the AC plug pack being for 110V rather than 240V with no response from the vendor (not Pixel/Inlogis).
Very happy with the mounting and how it went together and like the Clifton Labs amp with PTT switching.
Andrew de VK5CV
However, I read the the loop is "low impedance" not sure if that infers there is something special about it.
The principals of the loop are on the website. There are home brew amps suitable. The main difficulty is loop impedance matching with impedance rising with frequency.
Also - beware that the Pixel loop amplifier comes with a relay installed to drop DC power when you transmit. You tie it to your key-out line on the rig. The Wellbrook, as I understood when I first looked, does not have that RF bypass protection. So you have to take care to have some good distance between the Welbrook and your TX antenna, or else roll your own relaying.
My own installation uses the Pixel loop about 10 m from the 40m doublet that I use for Tx. I have nothing but praise for the Pixel loop, but I have never used the Wellbrook.
73 de Dave, N7AIG
and I have to say, you engineers are brilliant, but totally lousy communicators. That was about as clear as mud to me. I'll have to go back and study it again, and try to fill in the details with my own orientation toward E&M theory as a physicist.
[ I totally understand the disdain for humanities in college by engineering students, I was there myself. But honestly, a little bit of communication theory (spoken & written) wouldn't hurt your better chances in the future career path... ]
73 de Dave, N7AIG