Redifusion / Telefusion Cable Radio

A "Bygones" article reminded me of the old "speaker and selector" units we had at school and many homes had them. Our house hosted a bracket on the corner that held a Telefusion wire and my parent used to tell me they got paid 2 shillings and sixpence a year in rental for it.
It got me thinking - was the "network" via a multistranded cable to give the 4 channels that I think were on offer? Or was there some form of multiplexing back in those days?
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it was a multicore cable; vision and sound were on separate cores, too.
--
from KT24 in Surrey, England

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On Sun, 05 Mar 2017 12:19:19 +0000 (GMT), charles

Not on the Rediffusion system I was familiar with.
The sound was baseband 100v line, just like the earlier radio systems, and the vision was modulated on an RF carrier on the same pair of wires.
--

Graham.
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Yes this is what I was talking about. In some places you had two regions of tv as well, like down in the Eastbourne Area. the site was up very near Hanningtons current one, and it got the London stations through a convenient gap in the downs from Crystal Palace. The south I think came from Rowridge. They needed some clever (looked like chicken wire) on the mast to keep out the French stations during lift conditions.
Those were very simple times when you almost always knew how stuff worked, not like the black box tech we all have now. Brian
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On Mon, 6 Mar 2017 09:11:34 -0000, "Brian Gaff"

I think some people in the west of Scotland could get Ulster TV via cable, which I recall could be useful for football (not UTV's local matches before someone comments). .
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I had excellent reception of Hannington in this part of S London, by using a second aerial. Only reason I wanted it was different films on ITV late night.
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Dave Plowman snipped-for-privacy@davenoise.co.uk London SW
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I totally agree with your point Brian. I often used to ponder about if I could Time Travel, what technology would I take back 100years to shorten the development time. Most stuff nowadays would be pointless as one cannot understand its purpose of method of operation. When cars went to fuel injection I gave up on thinking that a car would be a useful exhibit for my time travelling jaunt.
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I still see remnants of it strung between houses around here. The cable is quite distinctive, having the guy wire wrapped spiral-fashion around it.
There were selector switches inside the house, usually mounted somewhere near the window where the cable entered. A rotary knob with maybe 6 positions.
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wrote:

I think the wire between the chimneys in this streetview image could well be remains of a relay system. https://goo.gl/maps/BwL6JSCCqi42
First noticed it a few years back while stuck in traffic and in some places the cables were hanging diconnected between buildings so I don't think it is telephone line. It is a road I only use about every two years and each time I go past a little more cable has been removed/fallen off.
G.Harman
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snipped-for-privacy@yahoo.co.uk wrote in news:9m6obchm3c0smsera2e3c3u2drfnjqun94@ 4ax.com:

I never saw it across the roof tops like that. My memory relates to sound only - I don't think we have vision in our area (Derby). Each of our classrooms had a speaker and selector switch.
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No, me neither. Usually under the eaves, or, rarely, between the ground and first floors.
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Maybe it's a regional thing, but in the Nottingham area the Redifusion cables were strung mainly from chimneys and corners of buildings, zigzagging along; and far too frequently one of the spans would be across the road.
Like this: https://goo.gl/maps/C1Ptz6pTMjr and further down the same street: https://goo.gl/maps/1CoXQ3KS5gB2 the way the cable is coming apart on the right there is absolutely classic, and can be seen on dozens of roads in that part of town.
--
Roland Perry

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wrote:

Unrelated to the cable but are the two poles a few yards behind and opposite each other genuine survivors from the trolleybus network , reinstated ones or replicas just but up to hold a banner for the Christmas lights etc?
G.Harman
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Mon, 6 Mar 2017, snipped-for-privacy@yahoo.co.uk remarked:

Christmas lights. The trams never went that far south, only as far as Trent Bridge cricket ground. Ditto the trolleybuses which replaced them.
The "new" tram (NET) was originally planned to go through West Bridford centre, along Davies Road to presumably a P&R near the bypass. Local residents successfully opposed it on the grounds of noise etc.
So there's still just the bus to the centre, but around one every two or three minutes. From Trent Bridge to the centre, last time I counted it was in excess of one per minute.
<https://www.google.co.uk/maps/place/Central+Avenue/@52.9319071,-1.126692 7,21z/data=!4m7!3m6!1s0x4879c3bf7487bbb7:0x7c2f07c5f3677b2d!6m1!1v5!8m2!3 d52.9319928!4d-1.1268416?hl=en>
--
Roland Perry

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On 05/03/2017 14:15, snipped-for-privacy@yahoo.co.uk wrote:

We have several times had the job of removing sections of old Redifusion cable and bracketry because it had become dangerous.
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Ironic that an aerial specialist is used to remove the opposition!
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I'd have thought the travelling community would have had it all by this time.
It was very high quality cable. You don't find ones like that nowadays. The TV being piggy backed was not for long runs. I seem to recall mostly there were octal plugs on the back of the tv and a large what lookied like multicore wire, but at the box some had coax as well as smaller multicores for the sound. Brian
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Brian Gaff was thinking very hard :

A TV my parents bought, had an octal socket on the back. That was to enable a wired remote control to be plugged in - an optional extra. I vaguely remember messing about with that socket, and making a remote control for it. It used solenoids for the channel turret tuner up/down action.
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I designed a home-brew remote control in around 1975, which used ultrasonic transducers to transfer the data. Ended up as a Practical Electronics cover project :)
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Roland Perry

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Roland Perry laid this down on his screen :

I can vaguely remember that :-)
Those were the days..
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