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Old 3rd Feb 2020, 10:06 am   #681
electronicskip
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Default Re: 405-Line VHF Aerials 2013 to the present day.

There is a 405 line aerial on a house i used to live in many years ago in worcester road Chipping norton , its still there today along with a broken dipole aerial .
My mother had them put up brand new when the house was being built for us back in the 60s.
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Old 3rd Feb 2020, 10:56 am   #682
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Default Re: 405-Line VHF Aerials 2013 to the present day.

What transmitters are the aerials for? Any chance of some pictures.
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Old 2nd Apr 2020, 8:15 pm   #683
Stuart R
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Default Re: 405-Line VHF Aerials 2013 to the present day.

I used to pass this first one in Letchworth on my daily walk to school, only spotted it again today - just about hanging on - whilst taking my daily permitted exercise. It is sort of pointing in a London direction, definitely not the local Sandy Heath. There's also a BSB Squarial a few doors up.

The second one I spot most mornings, from the North Circular Road, you can only see the X from the road, on closer inspection there are a few other aerials sharing that chimney.

Images courtesy of Google Streetview, I hope that's allowed.

SR
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Old 2nd Apr 2020, 8:27 pm   #684
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Default Re: 405-Line VHF Aerials 2013 to the present day.

The first one is a classic - bayed Band-III coupled to a Band-I dipole-and-director.

I always wondered about the ubiquity of Band-I dipole--and-director arrays in these setups; sure, it was easier to implement but a dipole-and-reflector would have offered more gain and better front:back ratio. I guess that back in the 1950s the chance of there being a co-channel Band-I transmitter 'behind you' was unlikely, but from memory Band-I was always the worst for obscure reflections causing devastating 'ghosting' which could come and go [as the local gasometer went up-and-down or the dockyard-crane five miles away turned].
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Old 2nd Apr 2020, 8:30 pm   #685
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Default Re: 405-Line VHF Aerials 2013 to the present day.

House across the road from me has one.

The first element has sat diagonally for as long as I can remember.

It points towards Sutton Coldfield
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Old 23rd Apr 2020, 11:08 pm   #686
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Default 1956 Aerial Picture - Cliftonville, Kent

One of my contacts on Flickr asked me about the aerial on this picture, as they knew I was interested in old technology.

https://www.***********/photos/trains...ff/49409668421

I could tell them the basics but I thought someone here could give a more comprehensive explanation.

Sorry I can't seem to embed the picture from Flickr.
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Last edited by Richard_FM; 23rd Apr 2020 at 11:13 pm.
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Old 23rd Apr 2020, 11:18 pm   #687
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Default Re: 1956 Aerial Picture - Cliftonville, Kent

Looks like a Channel 1 VHF vertically polarised 405 line BBC TV aerial to me!
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Old 23rd Apr 2020, 11:29 pm   #688
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Default Re: 1956 Aerial Picture - Cliftonville, Kent

That looks like an old Band 1 TV aerial for BBC 405 line reception.

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Old 24th Apr 2020, 9:48 am   #689
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Default Re: 405-Line VHF Aerials 2013 to the present day.

I did wonder how well it would have received ITV from Croydon, possibly not so well as it's a Band I aerial & the Kent downs are in the way.
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Old 24th Apr 2020, 10:23 am   #690
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Default Re: 405-Line VHF Aerials 2013 to the present day.

I would also go with channel one, looks the same length as the ones we had in Kent. Alexandra/Crystal palace.

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Old 24th Apr 2020, 11:21 am   #691
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Default Re: 1956 Aerial Picture - Cliftonville, Kent

Quote:
Originally Posted by Richard_FM View Post
One of my contacts on Flickr asked me about the aerial on this picture, as they knew I was interested in old technology.

https://www.***********/photos/trains...ff/49409668421

I could tell them the basics but I thought someone here could give a more comprehensive explanation.

Sorry I can't seem to embed the picture from Flickr.
Looks like Belling-Lee to me
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Old 24th Apr 2020, 4:44 pm   #692
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Default Re: 405-Line VHF Aerials 2013 to the present day.

That is a nice aerial and picture. That could be a shot from 1953! How has that survived so long and no Band 3/4/5/ added.
I always wonder what television receiver was on the end of these aerials. John.
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Old 24th Apr 2020, 6:09 pm   #693
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Default Re: 405-Line VHF Aerials 2013 to the present day.

Quote:
Originally Posted by Heatercathodeshort View Post
That is a nice aerial and picture. That could be a shot from 1953! How has that survived so long and no Band 3/4/5/ added.
I always wonder what television receiver was on the end of these aerials. John.
The caption says taken in 1956 so not so old at that point. Looks huge though!

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Old 24th Apr 2020, 6:37 pm   #694
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Default Re: 405-Line VHF Aerials 2013 to the present day.

Yes, a classic 3-element [dipole, director and reflector] Band-1 array - atop another classic rural-semi house.

I can easily imagine this from the early-1950s.
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Old 24th Apr 2020, 7:35 pm   #695
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Default Re: 405-Line VHF Aerials 2013 to the present day.

And keeping strictly to the thread topic, "To the present day".

June 2019

June 2012

June 2009

March 2009
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Old 22nd Jun 2020, 2:50 pm   #696
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Default Re: 405-Line VHF Aerials 2013 to the present day.

Seen today on the road from Swindon to Wroughton. A little horizontally-polarised 3-ele BIII pointed at Membury.

(horizontal polarisation was usually used for low-power 'infill' transmitters; Membury wasn't exactly low-power!)

The robust mast and chimney-lashings suggest it also once held a BI antenna, now departed.
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Old 23rd Jun 2020, 9:40 am   #697
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Default Re: 405-Line VHF Aerials 2013 to the present day.

I could pick up Membury in Kent many years ago, amongst other band 3 stations. I think that's the one alongside the Membury services on the M4.

We have a Membury down here and coincidentally its not far from the Stockland Hill transmitter.

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Old 25th Jun 2020, 4:11 pm   #698
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Default Re: 405-Line VHF Aerials 2013 to the present day.

Yes, Membury was next to the M4 service-area, the site was an old WWII RAF airfield. It always perplexed me that the IBA decided Membury should be a relay of Midlands-ITV [ATV] so the unfortunate residents of Swindon, Marlborough, Newbury, Trowbridge, Farmborough etc. got 'local' ITN news-coverage overlapping with Glossop, Ellesmere-Port, Oswestry, Chesterfield and Newark.

https://tx.mb21.co.uk/info/405/itv/midlands.gif

To me it would have made far more sense for Membury to have been a relay of London-ITV, London being only an hour's drive/train-journey away whereas getting from Trowbridge to Chesterfield - even in pre-Beeching times - would have taken most of a day.
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Old 25th Jun 2020, 10:55 pm   #699
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Default Re: 405-Line VHF Aerials 2013 to the present day.

Quote:
Originally Posted by G6Tanuki View Post
Yes, Membury was next to the M4 service-area, the site was an old WWII RAF airfield. It always perplexed me that the IBA decided Membury should be a relay of Midlands-ITV [ATV] so the unfortunate residents of Swindon, Marlborough, Newbury, Trowbridge, Farmborough etc. got 'local' ITN news-coverage overlapping with Glossop, Ellesmere-Port, Oswestry, Chesterfield and Newark.

https://tx.mb21.co.uk/info/405/itv/midlands.gif

To me it would have made far more sense for Membury to have been a relay of London-ITV, London being only an hour's drive/train-journey away whereas getting from Trowbridge to Chesterfield - even in pre-Beeching times - would have taken most of a day.
Southern would have been another suitable region, though the south midlands area is hard to fit into the usual regions.
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Old 6th Jul 2020, 2:24 pm   #700
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Default Re: 405-Line VHF Aerials 2013 to the present day.

405-line Television, alive and well here in Hexham.
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