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London Lite9,579 posts since 4 Jan 2003
London London
Both of the aerials are indoor - here's the one used for my YouView box:

https://www.maplin.co.uk/p/one-for-all-sv9420-curved-amplified-indoor-aerial-a13xh

Not sure if this is Group A or wideband...

The specification for that on the Maplin website says it is has a frequency range of 0-9 miles! Shocked
I think we can assume it is wideband as it doesn't have any information to say otherwise.


The ratings for that aerial aren't very good on the Maplin website.
Markymark5,765 posts since 13 Dec 2004
Meridian (North) South Today
Both of the aerials are indoor - here's the one used for my YouView box:

https://www.maplin.co.uk/p/one-for-all-sv9420-curved-amplified-indoor-aerial-a13xh

Not sure if this is Group A or wideband...

The specification for that on the Maplin website says it is has a frequency range of 0-9 miles! Shocked
I think we can assume it is wideband as it doesn't have any information to say otherwise.


The ratings for that aerial aren't very good on the Maplin website.


To be honest Mr Metal Gear may just as well use a coat-hanger, the results might be better !
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Markymark5,765 posts since 13 Dec 2004
Meridian (North) South Today
Here's my Crazy Scan 2 report for West London https://imgur.com/a/NDkdp

COM 8 is defintely much more marginal, and COM 7 is effectively invisible. (Crazy Scan 2 with Air Scan output)


Yes, for the benefit of others the tops of each mux should be totally flat, but they rarely are in reality.
Both COM 7 and 8 are in bad shape, COM 8 is so distorted it's obviously unrecoverable.

I note a nice 4G phone signal at 795ish MHz Cool
noggin13,668 posts since 26 Jun 2001
Here's my Crazy Scan 2 report for West London https://imgur.com/a/NDkdp

COM 8 is defintely much more marginal, and COM 7 is effectively invisible. (Crazy Scan 2 with Air Scan output)


Yes, for the benefit of others the tops of each mux should be totally flat, but they rarely are in reality.
Both COM 7 and 8 are in bad shape, COM 8 is so distorted it's obviously unrecoverable.

I note a nice 4G phone signal at 795ish MHz Cool


I get COM 8 on 754MHz (and thus receive CBeebies HD, and BBC Four HD tonight), it's COM 7 on 746MHz I don't receive (so no BBC News HD, C4+1 HD etc.). Grr...
Markymark5,765 posts since 13 Dec 2004
Meridian (North) South Today
Here's my Crazy Scan 2 report for West London https://imgur.com/a/NDkdp

COM 8 is defintely much more marginal, and COM 7 is effectively invisible. (Crazy Scan 2 with Air Scan output)


Yes, for the benefit of others the tops of each mux should be totally flat, but they rarely are in reality.
Both COM 7 and 8 are in bad shape, COM 8 is so distorted it's obviously unrecoverable.

I note a nice 4G phone signal at 795ish MHz Cool


I get COM 8 on 754MHz, it's COM 7 on 746MHz I don't receive by the look of it.


That is odd, run the scan a few times, if might be the distortion varies with time (due to local moving objects !)
but I assume you have no wind farms nearby ?!

http://www.wrightsaerials.tv/services/interference-studies/television_interference_studies_for_wind_turbine_installations.pdf
commseng136 posts since 8 Dec 2016
London London
I couldn't leave it, even if it is only until 2020 when COM 7 & 8 are switched off.
I have been to Maplin and bought a cheap 91(!) element wideband antenna, which is OK to live inside the loft. I suspect if it was rigged outdoors I would find bits of it on the ground before long.

COM 7 & 8 are now at signal strength 68/69 and both are quality 100% whereas with the old Group A antenna they both indicated zero.
The new aerial also has a 4G filter built in to it, but obviously nothing to null out whatever will appear above 700MHz when those frequencies are in use for 5G.
£12 is worth it for BBC Four / News HD even for a few years.
I've kept the decent old Group A aerial to put back up later.
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noggin13,668 posts since 26 Jun 2001

Yes, for the benefit of others the tops of each mux should be totally flat, but they rarely are in reality.
Both COM 7 and 8 are in bad shape, COM 8 is so distorted it's obviously unrecoverable.

I note a nice 4G phone signal at 795ish MHz Cool


I get COM 8 on 754MHz, it's COM 7 on 746MHz I don't receive by the look of it.


That is odd, run the scan a few times, if might be the distortion varies with time (due to local moving objects !)
but I assume you have no wind farms nearby ?!

http://www.wrightsaerials.tv/services/interference-studies/television_interference_studies_for_wind_turbine_installations.pdf


It's consistent over an hour or two. I have no wind farms near by...
itsrobert6,165 posts since 23 Mar 2001
Granada North West Today
I live in the Winter Hill transmitter area and had a wideband aerial installed about 10 years ago. I have never ever had even so much as a glitch in DTT signal since then....until the re-tune event this month. I have completely lost COM7 on the kitchen TV. The other TVs that are nearer the aerial can receive COM7 with 100% for both signal strength and quality. However, the same channel (55) is reporting 0% on the kitchen TV. Yet channel 54 is 100%. Can anyone explain that to me in layman's terms please?
Markymark5,765 posts since 13 Dec 2004
Meridian (North) South Today
I live in the Winter Hill transmitter area and had a wideband aerial installed about 10 years ago. I have never ever had even so much as a glitch in DTT signal since then....until the re-tune event this month. I have completely lost COM7 on the kitchen TV. The other TVs that are nearer the aerial can receive COM7 with 100% for both signal strength and quality. However, the same channel (55) is reporting 0% on the kitchen TV. Yet channel 54 is 100%. Can anyone explain that to me in layman's terms please?


There appear to be some receivers that are confused by the SI data in COM 7 and 8 that defines them as a national region ( which they are now, because they are national SFNs) . Additionally last month Emley Moor COM 7 became ‘invisible’ to many receivers for two 24 hour periods. That remains a mystery ( and Emley has had no retunes yet) In short there do appear to be many reception issues with COM 7 and 8 that appear to be more than traditional ‘aerial’ issues.
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itsrobert6,165 posts since 23 Mar 2001
Granada North West Today
Thanks Markymark. The question is then, whose responsibility is it to correct this? I don't see why I should have to buy new equipment when everything was working fine before the change. Do you think this is something the authorities will address or just leave us to suffer with? Thankfully I've got Sky on the living room and bedroom TVs but the channel I probably watched the most on the kitchen TV was BBC News HD which I have now lost. I'm really not happy - the affected TV is less than 12 months old for goodness sake!