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?
it was a multicore cable; vision and sound were on separate cores, too.
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.
En el artículo , charles escribió:
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.
Might be something on this ...
I think the wire between the chimneys in this streetview image could well be remains of a relay system.
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
There were remnants of the system in terraced houses I rented in the
80's, nothing live by then that I could detect, there was a website about it, but the content seems to have been got at by teh kittehsThe wayback machine can dredge up the old version ...
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.
Yes the Rotherham one was multicore, and sometimes the wires got mixed up and you got sound from one channel and picture from another.
Bill
We have several times had the job of removing sections of old Redifusion cable and bracketry because it had become dangerous.
Ironic that an aerial specialist is used to remove the opposition!
In message , at 14:15:27 on Sun, 5 Mar 2017, snipped-for-privacy@yahoo.co.uk remarked:
Here's a really droopy one:
Roland Perry wrote in news: snipped-for-privacy@perry.co.uk:
I suppose I have assumed they were telephone wires.
En el artículo , DerbyBorn escribió:
No, me neither. Usually under the eaves, or, rarely, between the ground and first floors.
We had television on a similar system. Only three channels. The TV had a thing like a piano keyboard. Cabling ran for miles under the eves of terrace houses.
Though it was TV it was called "Radio Rentals".
No it was just 100 volt lines as I recall, one for each radio or tv sound channel. Not very sophisticated in fact. I'm just trying to remember how the rf bit worked for the stations. The old TD20 panel was the workhorse that replaced the IF and tuner. My guess was it was around 10 mhz or tereabouts . I can remember when 625 came in there was a lot of modifications to be done for the dual standard system. Heath robinson would have been in his element.
When colour cam in many black and white sets needed a filter adding to stop really nasty patterning on bbc 2. Brian
Alternatively, could it be a medium wave aerial? I remember running one from the top of the house to the tree at the bottom of the garden.
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
Yes British Relay were also quite big. A lot of the Welsh Villages used the Rediffusion system. always getting lightening damaged pcbs back. brian
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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