3rd Feb 2020, 10:06 am | #681 |
Nonode
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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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Oh I've had that for years dear!! |
3rd Feb 2020, 10:56 am | #682 |
Nonode
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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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2nd Apr 2020, 8:15 pm | #683 |
Heptode
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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 |
2nd Apr 2020, 8:27 pm | #684 |
Dekatron
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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]. |
2nd Apr 2020, 8:30 pm | #685 |
Diode
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Location: Coventry, Warwickshire, UK.
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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 |
23rd Apr 2020, 11:08 pm | #686 |
Nonode
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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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23rd Apr 2020, 11:18 pm | #687 |
Dekatron
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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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23rd Apr 2020, 11:29 pm | #688 |
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Re: 1956 Aerial Picture - Cliftonville, Kent
That looks like an old Band 1 TV aerial for BBC 405 line reception.
Mike |
24th Apr 2020, 9:48 am | #689 |
Nonode
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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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24th Apr 2020, 10:23 am | #690 |
Dekatron
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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.
Peter |
24th Apr 2020, 11:21 am | #691 | |
Pentode
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Re: 1956 Aerial Picture - Cliftonville, Kent
Quote:
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24th Apr 2020, 4:44 pm | #692 |
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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. |
24th Apr 2020, 6:09 pm | #693 | |
Octode
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Re: 405-Line VHF Aerials 2013 to the present day.
Quote:
Peter |
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24th Apr 2020, 6:37 pm | #694 |
Dekatron
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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. |
24th Apr 2020, 7:35 pm | #695 |
Dekatron
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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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22nd Jun 2020, 2:50 pm | #696 |
Dekatron
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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. |
23rd Jun 2020, 9:40 am | #697 |
Dekatron
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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. Peter |
25th Jun 2020, 4:11 pm | #698 |
Dekatron
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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. |
25th Jun 2020, 10:55 pm | #699 | |
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Re: 405-Line VHF Aerials 2013 to the present day.
Quote:
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6th Jul 2020, 2:24 pm | #700 |
Octode
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Re: 405-Line VHF Aerials 2013 to the present day.
405-line Television, alive and well here in Hexham.
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