Range of reception
Does anyone know how many kilometers one needs to be within for an internal aerial to work?
What is the range in comparison to outdoor aerials?
If there are high trees in between my house and the transmitter, how badly will that effect my reception?
Replies to This Discussion
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Permalink Reply by Mike G on
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Hi Julian,
I can get an internal aerial to work around 15kms with nothing in the way. The biggest problem with internal aerials is their lack of focus. This causes signals to arrive from all directions, bounced off walls and roofs and this makes the reception unpredictable. One of my mates was flatting and he got a small outdoor aerial and put it on a plant pot outside and put a cable through the window edge. It worked way better that rabbits ears, with no break up of the signal. Took it away with him when he moved out!
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Permalink Reply by Julian Visch on
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The great thing with the bunny ears is you can point them in the direction you get the best signal. With fixed outside aerial you are stuck on one direction.
Mike Gailer said:Hi Julian,
I can get an internal aerial to work around 15kms with nothing in the way. The biggest problem with internal aerials is their lack of focus. This causes signals to arrive from all directions, bounced off walls and roofs and this makes the reception unpredictable. One of my mates was flatting and he got a small outdoor aerial and put it on a plant pot outside and put a cable through the window edge. It worked way better that rabbits ears, with no break up of the signal. Took it away with him when he moved out!
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Yes because as we know, the broadcaster shift the transmitters. Each day they move them around.
*sigh
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If the position of reception (not transmission) didn't change we would never need to switch the position of the rabbit ears, but we do. The point thou is that you can point rabbit ears in a direction which you were claiming you can't do.
nzdtv.com said:Yes because as we know, the broadcaster shift the transmitters. Each day they move them around.
*sigh
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Permalink Reply by Bel @ Freeview on
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Hey Julian, rabbit ears are designed to receive signals transmitted at the lower end of the High Frequency spectrum (VHF signals) - digital television is transmitted through the higher end of the High Frequency spectrum (via UHF signals).
VHF & UHF behave quite differently to atmospheric / ionispheric / environmental effects so you really want a UHF aerial that's been designed to receive UHF signals for reliable results.
Trying to use rabbit ears to catch UHF signals is like using a gumboot to catch fish - with JUST the right conditions, and a lot of skill & luck, you might be able to swing it once in a blue moon, but most of the time it's an exercise in frustration & futility.
So...drop the rabbit ears & go for the external UHF aerial mate!
When the UHF aerial's on the roof - it's elevated and free from physical obstructions so it gives that aerial the best optimal conditions to capture signal data in the air.
So when it's up high, you get a good view :0)
Julian Visch said:If the position of reception (not transmission) didn't change we would never need to switch the position of the rabbit ears, but we do. The point thou is that you can point rabbit ears in a direction which you were claiming you can't do.
nzdtv.com said:Yes because as we know, the broadcaster shift the transmitters. Each day they move them around.
*sigh
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It is an uhf aerial which comes complete with rabbit ears. Sorry but they claimed similar things with vhf and that we must get an aerial, then they boosted the signal and all the problems disappeared. What you are claiming doesn't make sense to me. Parents are close to reception, if they can't get a signal with internal uhf aerial then neither would anyone else and noone would be selling the aerials, or producing them for that matter. What is the point of making uhf aerials?
Bel said:Hey Julian, rabbit ears are designed to receive signals transmitted at the lower end of the High Frequency spectrum (VHF signals) - digital television is transmitted through the higher end of the High Frequency spectrum (via UHF signals).
VHF & UHF behave quite differently to atmospheric / ionispheric / environmental effects so you really want a UHF aerial that's been designed to receive UHF signals for reliable results.
Trying to use rabbit ears to catch UHF signals is like using a gumboot to catch fish - with JUST the right conditions, and a lot of skill & luck, you might be able to swing it once in a blue moon, but most of the time it's an exercise in frustration & futility.
So...drop the rabbit ears & go for the external UHF aerial mate!
When the UHF aerial's on the roof - it's elevated and free from physical obstructions so it gives that aerial the best optimal conditions to capture signal data in the air.
So when it's up high, you get a good view :0)
Julian Visch said:If the position of reception (not transmission) didn't change we would never need to switch the position of the rabbit ears, but we do. The point thou is that you can point rabbit ears in a direction which you were claiming you can't do.
nzdtv.com said:Yes because as we know, the broadcaster shift the transmitters. Each day they move them around.
*sigh
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Those rabbits ears with the little UHF antenna on them aren't really good enough and they cost as much as some outdoor aerials!
External aerials are the right way to go. (They were also the way to go for reliable analog reception too.).
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Price for an outside aerial is $250 (including installation), inside $50 (including installation).
If they were reliable then why are people losing conection with outside aerials installed by professionals?
Mike Gailer said:Those rabbits ears with the little UHF antenna on them aren't really good enough and they cost as much as some outdoor aerials!
External aerials are the right way to go. (They were also the way to go for reliable analog reception too.).
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My outside uhf aerial is running perfectly and has for several years. No breakup of signal, ever. Around 20kms from the transmitter. Haven't got line of sight but I'm just below a ridge and it works well. All I can suggest is that those professional installers weren't.
The only breakup problems I have encountered have been due to either a VHF aerial being used, poor quality cable, old splitters, or signal loop through of old devices.
Keep us updated once you have tried an external aerial.
Julian Visch said:Price for an outside aerial is $250 (including installation), inside $50 (including installation).
If they were reliable then why are people losing conection with outside aerials installed by professionals?
Mike Gailer said:Those rabbits ears with the little UHF antenna on them aren't really good enough and they cost as much as some outdoor aerials!
External aerials are the right way to go. (They were also the way to go for reliable analog reception too.).
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I did some test at a family members home here in Nelson after analogue shutdown. As they wanted an option for the tv in the bedroom. Since they had Sky in the lounge
Using a set of bunny ears $20 warehouse specials made in fChina I forget the branding etc. Consisted of typical 2 VHF telescopic rods and circular reflector as the UHF part.
Fortunatly the local MT Campbell still had a UHF channel 39 analogue signal running (this is a local ham operators TV repeater)
Using the set tuned to Channel 39 at no stage could i get anything approaching a recognizable test card of any type using bunnyears. Unscrewing the 2 VHF band telescopic rods, the same no change to image whatsoever. Now the interesting part placing some foil over the loop reflected enough signal to gain a very faint weak image.
But still signal level well below what was needed to find or load digital services. I would say that there are some UHF indoor antennas that in some circumstance MAY work well and give acceptable results.
These panel type antennas for example
http://www.freeviewshop.co.nz/active-flat-panel-indoor-aerial-freev...
Another issue with indoor antennas is many have no ability to be set to the correct polarity of the transmission.
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Set to the correct polarity? Are you saying external aerials can be?
Why has it taken you this long to provide information on good internal aerials? Why are you always going for the expensive options? $250 may be nothing to you, but it is 2 weeks rent to others.
nzdtv.com said:I did some test at a family members home here in Nelson after analogue shutdown. As they wanted an option for the tv in the bedroom. Since they had Sky in the lounge
Using a set of bunny ears $20 warehouse specials made in fChina I forget the branding etc. Consisted of typical 2 VHF telescopic rods and circular reflector as the UHF part.
Fortunatly the local MT Campbell still had a UHF channel 39 analogue signal running (this is a local ham operators TV repeater)
Using the set tuned to Channel 39 at no stage could i get anything approaching a recognizable test card of any type using bunnyears. Unscrewing the 2 VHF band telescopic rods, the same no change to image whatsoever. Now the interesting part placing some foil over the loop reflected enough signal to gain a very faint weak image.
But still signal level well below what was needed to find or load digital services. I would say that there are some UHF indoor antennas that in some circumstance MAY work well and give acceptable results.
These panel type antennas for example
http://www.freeviewshop.co.nz/active-flat-panel-indoor-aerial-freev...
Another issue with indoor antennas is many have no ability to be set to the correct polarity of the transmission.
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