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#11
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Roger Mills wrote:
On 22/04/2013 01:31, Bill Wright wrote: Some time ago in this hallowed forum I predicted that DIY TV aerials would appear after DSO. These would be omnidirectional. https://dl.dropboxusercontent.com/u/.../WP_000029.jpg Bill Looks basically similar to the omni-direction aerials fitted to most touring caravans these days. I suppose that they work - after a fashion - but they wouldn't be my first choice for a permanent installation! But given the high field strengths we now have and the fact that many locations have transmitters in all directions, I would think most people will have some success with them. Bill |
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#12
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On Mon, 22 Apr 2013 10:06:40 +0100, "Max Demian"
wrote: "Bill Wright" wrote in message ... Some time ago in this hallowed forum I predicted that DIY TV aerials would appear after DSO. These would be omnidirectional. https://dl.dropboxusercontent.com/u/.../WP_000029.jpg I remember that sort of thing from the seventies. A little coil of wire or something and a short lead to the TV, with a money back guarantee. I think they just relied on inertia selling. My auntie had some sort of indoor aerial that was just a coil fixed to the wall behind the TV. It worked very well until she was sold a digital aerial and a Freeview box. Nothing worked as it was. She plugged the old aerial back in but it no longer worked. I didn't try to explain as she won't understand. I found her a local aerial/TV man. I hope he understands non technical over 80's Steve -- EasyNN-plus. Neural Networks plus. http://www.easynn.com SwingNN. Forecast with Neural Networks. http://www.swingnn.com JustNN. Just Neural Networks. http://www.justnn.com |
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#13
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"Bill Wright" wrote in message ... Some time ago in this hallowed forum I predicted that DIY TV aerials would appear after DSO. These would be omnidirectional. https://dl.dropboxusercontent.com/u/.../WP_000029.jpg Bill These days most sets have sufficient sensitivity to receive off a short piece of wire. |
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#14
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Graham. wrote:
Bill Wright wrote: https://dl.dropboxusercontent.com/u/.../WP_000029.jpg I photographed one of those a year ago and uploaded it to Flickr. No doubt I meant to post it here, but it seems I forgot. http://www.flickr.com/photos/g3zvt/7...n/photostream/ No, I remember someone posting it before ... |
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#15
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Martin wrote:
But given the high field strengths we now have and the fact that many locations have transmitters in all directions, I would think most people will have some success with them. better than using a bent coat hanger? Not better than a bent coat hanger outdoor and high up, no. Bill |
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#16
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In message , Bill Wright
writes Martin wrote: But given the high field strengths we now have and the fact that many locations have transmitters in all directions, I would think most people will have some success with them. better than using a bent coat hanger? Not better than a bent coat hanger outdoor and high up, no. The UHF folded dipole I made for my MIL, out of a coathanger, and mounted on the inside windowsill of her bungalow, behind the TV set, at a height of about 2' 6" above the ground, worked perfectly on analogue. -- Ian |
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#17
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"R. Mark Clayton" wrote in message ... "Bill Wright" wrote in message ... Some time ago in this hallowed forum I predicted that DIY TV aerials would appear after DSO. These would be omnidirectional. https://dl.dropboxusercontent.com/u/.../WP_000029.jpg Bill These days most sets have sufficient sensitivity to receive off a short piece of wire. You certainly could get a signal from just a flylead at my old house, but then you could also see the transmitter from the lounge window. -- Alex |
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#18
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On Mon, 22 Apr 2013 01:31:54 +0100, Bill Wright
wrote: Some time ago in this hallowed forum I predicted that DIY TV aerials would appear after DSO. These would be omnidirectional. https://dl.dropboxusercontent.com/u/.../WP_000029.jpg Bill It's made in China, doesn't claim to be omnidirectional, and has a 20db amplifier with mains PSU. -- Dave W |
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#19
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Dave W wrote:
On Mon, 22 Apr 2013 01:31:54 +0100, Bill Wright wrote: Some time ago in this hallowed forum I predicted that DIY TV aerials would appear after DSO. These would be omnidirectional. https://dl.dropboxusercontent.com/u/.../WP_000029.jpg Bill It's made in China, doesn't claim to be omnidirectional, and has a 20db amplifier with mains PSU. The instructions say 'no alignment...omnidirectional...mount on the side of the house facing the transmitter'. Bill |
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#20
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In message , Ian Jackson
writes In message , Andy Burns writes Bill Wright wrote: Some time ago in this hallowed forum I predicted that DIY TV aerials would appear after DSO. These would be omnidirectional. https://dl.dropboxusercontent.com/u/.../WP_000029.jpg Dave seems to like it http://youtu.be/gMmkWvgbA_w He says it's unidirectional. I note that the 'dome' is not completely circular, so it could be true. Or on reflection, did he actually say "undirectional"? -- Ian |
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