Here's a picture of my simple test UHF loop setup. (pretty simple eh?)
It's a UHF Loop from an old portable analog TV we had from way back.
It's just a circular steel ring, about 7 3/4 inches in diameter, screwed down to a piece of 2/4 wood, with old balun / matching transformer attached.
A long piece of coax (not shown) attaches it to the input at the back of the TV, and you're free to move it around and point it around in the room.
This original loop has "ball joints" so you can rotate it around (but you don't need those using it like this ... because you move the unit around with a long piece of coax going to the TV.) This loop was was originally intended to connect directly to the 300 ohm UHF terminals at the back of a portable TV, and sit right behind the portable TV.
In Kingston Ontario,
reception with this UHF loop, from inside
2nd floor room:
(aiming UHF loop manually, for best reception)
VHF LO analog
2 Global (north east from Bancroft)- nothing - (far and VHF LO)
6 CTV (west from Deseronto) - fairly good reception - a little weak and snowy, no ghost
VHF HI analog
11 CKWS - CBC local - clear and strong (strong local channel)
15 "CBLFT13" (CBC Fr.) Clear w/some static - no ghost
32 "CBLFT14" (CBC Fr.) Clear and strong - no ghost
38 CICO TV-38 (TVO) Clear w/minor static, no ghost, a little wavy at times, sound a little raspy, minor transparent line down screen.
53 CICO TV-53 (TVO) Clear picture, moderate static, no ghost, o.k.
(none locally in Kingston yet ...)
I have not gotten around to trying connect the UHF loop to the digital converter box, and point towards the U.S. and try ... but that's the next test.
Watertown N.Y. is around 45 miles away (WPBS 16-1,2,3 , CBS WWNY 7-1, 2)
[ I get these easily with other outdoor antennas on tower ]
[ Long ago, we used to get WPBS analog with the loop, inside the room, 2nd floor]
IF you stuck a couple of these simple UHF LOOPS outside, high up, and pointed them correctly towards the different transmitters ... I think there would be better results - analog - better picture and sound quality than what I am getting testing from inside.)
(THIS BODES WELL for the UHF LOOP, for simple "nearby" local or suburban Digital reception ... alot of that is going in the VHF-HI and UHF direction. And because with digital, if you get a good enough signal ... you've got good picture and sound - no ghosts or snow or raspy sound with digital - compared to analog).
I've also been experimenting with screens and reflectors placed around the loop, to see if picture or sound show any minor improvement. Or if interference or ghosting can be reduced. Or if reflector at the back can increase gain and improve analog picture or sound.
The UHF LOOP is also showing advantages over a 21 inch, omni-directional, amplified and FM Trapped, UFO antenna out high on the tower. There's a lot more ghosting and interference and wavy picture and rolling picture from the that omni-directional UFO antenna on some channels. Some analog channels are unwatchable from the omni UFO. Even with better placement and high up outdoors. It must be picking up reflections from all directions ... and overloading the pre-amp on some channels esp ch 32 CBLFT only 3.6 miles away and very strong. Not sure how all this will translate after transition to digital.