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connecting coaxial inside a wall plate for TV
Simple question: Should the braid be connected to anything? The back of
the wall plate looks like a connector for the central copper wire plus a clamp for the cable. does the braided sheathing need to be connected through to the telly??? |
connecting coaxial inside a wall plate for TV
On Wednesday, 10 April 2019 18:44:26 UTC+1, TimW wrote:
Simple question: Should the braid be connected to anything? The back of the wall plate looks like a connector for the central copper wire plus a clamp for the cable. does the braided sheathing need to be connected through to the telly??? The clamp goes onto the braid, ie the outer sheath has to be removed. Make sure the braid doesn't short onto the central solid wire. |
connecting coaxial inside a wall plate for TV
TimW wrote
Simple question: Should the braid be connected to anything? Yep. to the metal outer of the socket. The back of the wall plate looks like a connector for the central copper wire plus a clamp for the cable. does the braided sheathing need to be connected through to the telly??? Yep. |
connecting coaxial inside a wall plate for TV
On Wednesday, 10 April 2019 18:44:26 UTC+1, TimW wrote:
Simple question: Should the braid be connected to anything? yes, otherwise it'll amplify your bile. Or something like that. |
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On Thu, 11 Apr 2019 05:28:12 +1000, cantankerous trolling geezer Rot Speed,
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connecting coaxial inside a wall plate for TV
On Wed, 10 Apr 2019 19:40:29 +0100, Terry Casey
wrote: snip Strip back the outer sheath then fold the braid back over the sheath - you may have to partially or totally unravel it - and place both the braid AND sheath together under the clamp. If the cable also has a copper foil screen, rather than a bonded aluminium one, tear it off so that it can't get in the wrong place. The clamp performs two function, one physical and one electrical. +1 Cheers, T i m |
connecting coaxial inside a wall plate for TV
On Wednesday, 10 April 2019 19:40:32 UTC+1, Terry Casey wrote:
In article 29f185cd-5f7e-4dfb-9f58- , says... On Wednesday, 10 April 2019 18:44:26 UTC+1, TimW wrote: Simple question: Should the braid be connected to anything? The back of the wall plate looks like a connector for the central copper wire plus a clamp for the cable. does the braided sheathing need to be connected through to the telly??? The clamp goes onto the braid, ie the outer sheath has to be removed. Make sure the braid doesn't short onto the central solid wire. No! Strip back the outer sheath then fold the braid back over the sheath - you may have to partially or totally unravel it - and place both the braid AND sheath together under the clamp. If the cable also has a copper foil screen, rather than a bonded aluminium one, tear it off so that it can't get in the wrong place. The clamp performs two function, one physical and one electrical. -- Drivel. The cable is not subject to mechanical stress as it's behind the wall plate. |
connecting coaxial inside a wall plate for TV
On Wed, 10 Apr 2019 22:45:30 -0700 (PDT), harry
wrote: On Wednesday, 10 April 2019 19:40:32 UTC+1, Terry Casey wrote: In article 29f185cd-5f7e-4dfb-9f58- , says... On Wednesday, 10 April 2019 18:44:26 UTC+1, TimW wrote: Simple question: Should the braid be connected to anything? The back of the wall plate looks like a connector for the central copper wire plus a clamp for the cable. does the braided sheathing need to be connected through to the telly??? The clamp goes onto the braid, ie the outer sheath has to be removed. Make sure the braid doesn't short onto the central solid wire. No! Strip back the outer sheath then fold the braid back over the sheath - you may have to partially or totally unravel it - and place both the braid AND sheath together under the clamp. If the cable also has a copper foil screen, rather than a bonded aluminium one, tear it off so that it can't get in the wrong place. The clamp performs two function, one physical and one electrical. -- Drivel. Is it ... IYHO of course! The cable is not subject to mechanical stress as it's behind the wall plate. So, between the faceplate being off and back in place, there is no chance any strain could be put on the inner conductor (if the clamp wasn't providing any mechanical support)? Or if someone pulls the cable from the other end ... ? What you meant was in 'harry's world' (... Imagine how sad / sick a place that would be if it was a Theme Park ...) you couldn't imagine any circumstances where making sure the mechanical clamp was as good as possible would be a 'good idea'? Cheers, T i m |
connecting coaxial inside a wall plate for TV
On 11/04/2019 06:45, harry wrote:
Drivel. The cable is not subject to mechanical stress as it's behind the wall plate. It's probably bent at an angle that is trying to pull it out of the clamp. -- mailto : news {at} admac {dot} myzen {dot} co {dot} uk |
connecting coaxial inside a wall plate for TV
Of course it does, they don't just put it there to annoy people trying not
to short it out you know. I think if you have to ask such a question you might not be the best person to wire up aerials. Brian -- ----- -- This newsgroup posting comes to you directly from... The Sofa of Brian Gaff... Blind user, so no pictures please Note this Signature is meaningless.! "TimW" wrote in message ... Simple question: Should the braid be connected to anything? The back of the wall plate looks like a connector for the central copper wire plus a clamp for the cable. does the braided sheathing need to be connected through to the telly??? |
connecting coaxial inside a wall plate for TV
On 11/04/2019 08:30, alan_m wrote:
On 11/04/2019 06:45, harry wrote: Drivel. The cable is not subject to mechanical stress as it's behind the wall plate. It's probably bent at an angle that is trying to pull it out of the clamp. Its the wrong wall plate then. The minimum radius on coax is quite large. If its TV it matters less than for sat. |
connecting coaxial inside a wall plate for TV
On 11/04/2019 08:50, Brian Gaff wrote:
....you might not be the best person to wire up aerials. Brian True |
connecting coaxial inside a wall plate for TV
On 11/04/2019 06:45, harry wrote:
The clamp performs two function, one physical and one electrical. -- Drivel. The cable is not subject to mechanical stress as it's behind the wall plate. Dribble yourself Harry! It's much easier to put the wallplate into position if the cables are secured to it firmly. Also, if the outer sheath doesn't reach the braid clamp the dielectric can deform as the plate is fitted, causing an impedance bump. Bill |
connecting coaxial inside a wall plate for TV
On 11/04/2019 09:06, dennis@home wrote:
It's probably bent at an angle that is trying to pull it out of the clamp. Its the wrong wall plate then. There's no way a wallplate can align the cable entry so the cable doesn't have to bend. The minimum radius on coax is quite large. CT100 semi-airspaced is about 70mm. Foam is a bit less. If its TV it matters less than for sat. How come, since cable losses are greater at higher frequencies, meaning that signals reflected due to poor VSWR are absorbed more rapidly? Bill |
connecting coaxial inside a wall plate for TV
In article ,
TimW wrote: Simple question: Should the braid be connected to anything? The back of the wall plate looks like a connector for the central copper wire plus a clamp for the cable. does the braided sheathing need to be connected through to the telly??? The braid goes under the clamp. -- *I used to be a banker, but then I lost interest.* Dave Plowman London SW To e-mail, change noise into sound. |
connecting coaxial inside a wall plate for TV
On Thursday, 11 April 2019 07:48:46 UTC+1, T i m wrote:
On Wed, 10 Apr 2019 22:45:30 -0700 (PDT), harry wrote: On Wednesday, 10 April 2019 19:40:32 UTC+1, Terry Casey wrote: In article 29f185cd-5f7e-4dfb-9f58- , says... On Wednesday, 10 April 2019 18:44:26 UTC+1, TimW wrote: Simple question: Should the braid be connected to anything? The back of the wall plate looks like a connector for the central copper wire plus a clamp for the cable. does the braided sheathing need to be connected through to the telly??? The clamp goes onto the braid, ie the outer sheath has to be removed. Make sure the braid doesn't short onto the central solid wire. No! Strip back the outer sheath then fold the braid back over the sheath - you may have to partially or totally unravel it - and place both the braid AND sheath together under the clamp. If the cable also has a copper foil screen, rather than a bonded aluminium one, tear it off so that it can't get in the wrong place. The clamp performs two function, one physical and one electrical. -- Drivel. Is it ... IYHO of course! The cable is not subject to mechanical stress as it's behind the wall plate. So, between the faceplate being off and back in place, there is no chance any strain could be put on the inner conductor (if the clamp wasn't providing any mechanical support)? Or if someone pulls the cable from the other end ... ? What you meant was in 'harry's world' (... Imagine how sad / sick a place that would be if it was a Theme Park ...) you couldn't imagine any circumstances where making sure the mechanical clamp was as good as possible would be a 'good idea'? So why don't they have a cable grip on the incomer(s) of a 13a socket? The consequences of an aerial cable coming loose are trivial anyway. |
connecting coaxial inside a wall plate for TV
On Thursday, 11 April 2019 14:03:53 UTC+1, Bill Wright wrote:
On 11/04/2019 06:45, harry wrote: The clamp performs two function, one physical and one electrical. -- Drivel. The cable is not subject to mechanical stress as it's behind the wall plate. Dribble yourself Harry! It's much easier to put the wallplate into position if the cables are secured to it firmly. Also, if the outer sheath doesn't reach the braid clamp the dielectric can deform as the plate is fitted, causing an impedance bump. Bill https://www.aerialsandtv.com/_wp_gen...9d9f_01_1a.jpg |
connecting coaxial inside a wall plate for TV
On 11/04/2019 14:08, Bill Wright wrote:
On 11/04/2019 09:06, dennis@home wrote: It's probably bent at an angle that is trying to pull it out of the clamp. Its the wrong wall plate then. There's no way a wallplate can align the cable entry so the cable doesn't have to bend. The minimum radius on coax is quite large. CT100 semi-airspaced is about 70mm. Foam is a bit less. If its TV it matters less than for sat. How come, since cable losses are greater at higher frequencies, meaning that signals reflected due to poor VSWR are absorbed more rapidly? Bill the frequency from the LNB is higher than Digital TV IIRC. Use a deep box with F type both sides if its through the wall and line up the hole in the wall? |
connecting coaxial inside a wall plate for TV
On Thu, 11 Apr 2019 09:06:19 -0700 (PDT), harry
wrote: snip The cable is not subject to mechanical stress as it's behind the wall plate. So, between the faceplate being off and back in place, there is no chance any strain could be put on the inner conductor (if the clamp wasn't providing any mechanical support)? Or if someone pulls the cable from the other end ... ? What you meant was in 'harry's world' (... Imagine how sad / sick a place that would be if it was a Theme Park ...) you couldn't imagine any circumstances where making sure the mechanical clamp was as good as possible would be a 'good idea'? So why don't they have a cable grip on the incomer(s) of a 13a socket? Because the conductors are typically 2.5sqmm and between them generally hold the cable group in place. Not the same with a very fine central conductor on a co-ax cable (especially one that may have been nicked with the cutter when being stripped). The consequences of an aerial cable coming loose are trivial anyway. Not really the point though eh? Cheers, T i m |
connecting coaxial inside a wall plate for TV
On 11/04/2019 17:06, harry wrote:
So why don't they have a cable grip on the incomer(s) of a 13a socket? Because the individual conductors are separated and the whole conductor is gripped by the screw. With coax only the thin inner is gripped. The consequences of an aerial cable coming loose are trivial anyway. Not if it's in a system that's under warranty and is 200 miles away. Bill |
connecting coaxial inside a wall plate for TV
On 11/04/2019 18:32, dennis@home wrote:
How come, since cable losses are greater at higher frequencies, meaning that signals reflected due to poor VSWR are absorbed more rapidly? Bill the frequency from the LNB is higher than Digital TV IIRC. Use a deep box with F type both sides if its through the wall and line up the hole in the wall? Exactly. Bill |
connecting coaxial inside a wall plate for TV
On 11/04/2019 17:11, harry wrote:
On Thursday, 11 April 2019 14:03:53 UTC+1, Bill Wright wrote: On 11/04/2019 06:45, harry wrote: The clamp performs two function, one physical and one electrical. -- Drivel. The cable is not subject to mechanical stress as it's behind the wall plate. Dribble yourself Harry! It's much easier to put the wallplate into position if the cables are secured to it firmly. Also, if the outer sheath doesn't reach the braid clamp the dielectric can deform as the plate is fitted, causing an impedance bump. Bill https://www.aerialsandtv.com/_wp_gen...9d9f_01_1a.jpg That appears to be the type of wallplate in which the inner is held by a spring clip and the braid has to be folded back under the braid clamp. Bill |
connecting coaxial inside a wall plate for TV
On 10/04/2019 18:44, TimW wrote:
Simple question: Should the braid be connected to anything? The back of the wall plate looks like a connector for the central copper wire plus a clamp for the cable. does the braided sheathing need to be connected through to the telly??? http://www.satcure.co.uk/tech/wall_plates.htm -- mailto : news {at} admac {dot} myzen {dot} co {dot} uk |
connecting coaxial inside a wall plate for TV
In article ,
harry wrote: On Wednesday, 10 April 2019 19:40:32 UTC+1, Terry Casey wrote: In article 29f185cd-5f7e-4dfb-9f58- , says... On Wednesday, 10 April 2019 18:44:26 UTC+1, TimW wrote: Simple question: Should the braid be connected to anything? The back of the wall plate looks like a connector for the central copper wire plus a clamp for the cable. does the braided sheathing need to be connected through to the telly??? The clamp goes onto the braid, ie the outer sheath has to be removed. Make sure the braid doesn't short onto the central solid wire. No! Strip back the outer sheath then fold the braid back over the sheath - you may have to partially or totally unravel it - and place both the braid AND sheath together under the clamp. If the cable also has a copper foil screen, rather than a bonded aluminium one, tear it off so that it can't get in the wrong place. The clamp performs two function, one physical and one electrical. -- Drivel. The cable is not subject to mechanical stress as it's behind the wall plate. It almosr certainly will be when the plate is secured to the wall box. -- from KT24 in Surrey, England "I'd rather die of exhaustion than die of boredom" Thomas Carlyle |
connecting coaxial inside a wall plate for TV
On Friday, 12 April 2019 03:16:48 UTC+1, Bill Wright wrote:
On 11/04/2019 17:06, harry wrote: So why don't they have a cable grip on the incomer(s) of a 13a socket? Because the individual conductors are separated and the whole conductor is gripped by the screw. With coax only the thin inner is gripped. The consequences of an aerial cable coming loose are trivial anyway. Not if it's in a system that's under warranty and is 200 miles away. Bill We're talking a bout safety here. Whoever heard of trouble like this anyway? Who's going to travel 200 miles to install a TV aerial? |
connecting coaxial inside a wall plate for TV
On Sat, 13 Apr 2019 00:33:29 -0700 (PDT), harry
wrote: On Friday, 12 April 2019 03:16:48 UTC+1, Bill Wright wrote: On 11/04/2019 17:06, harry wrote: So why don't they have a cable grip on the incomer(s) of a 13a socket? Because the individual conductors are separated and the whole conductor is gripped by the screw. With coax only the thin inner is gripped. The consequences of an aerial cable coming loose are trivial anyway. Not if it's in a system that's under warranty and is 200 miles away. Bill We're talking a bout safety here. Only you are for some reason. Whoever heard of trouble like this anyway? Many people. Who's going to travel 200 miles to install a TV aerial? Have you ever been to Scotland? Because you are a left brainer it's obvious you would 1) not be able to consider scenarios outside your own personal experiences and 2) argue the validity of any scenario outside your personal experiences. Cheers, T i m |
connecting coaxial inside a wall plate for TV
In article ,
harry wrote: On Friday, 12 April 2019 03:16:48 UTC+1, Bill Wright wrote: On 11/04/2019 17:06, harry wrote: So why don't they have a cable grip on the incomer(s) of a 13a socket? Because the individual conductors are separated and the whole conductor is gripped by the screw. With coax only the thin inner is gripped. The consequences of an aerial cable coming loose are trivial anyway. Not if it's in a system that's under warranty and is 200 miles away. Bill We're talking a bout safety here. Whoever heard of trouble like this anyway? Who's going to travel 200 miles to install a TV aerial? Some years ago, I came across a distribution system for some sheltered housing in Farnborough which was maintained by a firm in Newxcatle upon Tyne. -- from KT24 in Surrey, England "I'd rather die of exhaustion than die of boredom" Thomas Carlyle |
connecting coaxial inside a wall plate for TV
On Saturday, 13 April 2019 09:43:21 UTC+1, charles wrote:
In article , harry wrote: On Friday, 12 April 2019 03:16:48 UTC+1, Bill Wright wrote: On 11/04/2019 17:06, harry wrote: So why don't they have a cable grip on the incomer(s) of a 13a socket? Because the individual conductors are separated and the whole conductor is gripped by the screw. With coax only the thin inner is gripped. The consequences of an aerial cable coming loose are trivial anyway. Not if it's in a system that's under warranty and is 200 miles away. Bill We're talking a bout safety here. Whoever heard of trouble like this anyway? Who's going to travel 200 miles to install a TV aerial? Some years ago, I came across a distribution system for some sheltered housing in Farnborough which was maintained by a firm in Newxcatle upon Tyne. There's one then. I 'spect most installers don't go more then ten or fifteen miles for a job. |
connecting coaxial inside a wall plate for TV
On 13/04/2019 09:37, charles wrote:
Some years ago, I came across a distribution system for some sheltered housing in Farnborough which was maintained by a firm in Newxcatle upon Tyne. Did they have a local office? Andy |
connecting coaxial inside a wall plate for TV
In article ,
Vir Campestris wrote: On 13/04/2019 09:37, charles wrote: Some years ago, I came across a distribution system for some sheltered housing in Farnborough which was maintained by a firm in Newxcatle upon Tyne. Did they have a local office? Not that the resident in the housing scheme knew about -- from KT24 in Surrey, England "I'd rather die of exhaustion than die of boredom" Thomas Carlyle |
connecting coaxial inside a wall plate for TV
On 13/04/2019 08:33, harry wrote:
On Friday, 12 April 2019 03:16:48 UTC+1, Bill Wright wrote: On 11/04/2019 17:06, harry wrote: So why don't they have a cable grip on the incomer(s) of a 13a socket? Because the individual conductors are separated and the whole conductor is gripped by the screw. With coax only the thin inner is gripped. The consequences of an aerial cable coming loose are trivial anyway. Not if it's in a system that's under warranty and is 200 miles away. Bill We're talking a bout safety here. Whoever heard of trouble like this anyway? It's a common cause of reception problems. The braid loses contact with the plate during installation. Who's going to travel 200 miles to install a TV aerial? That's mostly how I made my living for many years. Distribution systems in all corners of the UK. All of them under warranty. Bill |
connecting coaxial inside a wall plate for TV
On 13/04/2019 09:37, charles wrote:
Who's going to travel 200 miles to install a TV aerial? Some years ago, I came across a distribution system for some sheltered housing in Farnborough which was maintained by a firm in Newxcatle upon Tyne. Yes, some years ago there was a Newcastle firm that had contracts with property management firms and housing associations all over the UK. I don't remember the name. They tended to send their own electricians (who were electricians pure and simple) to fix problems with TV distribution systems. They also used them to install CCTV. These guys routinely fitted a modulator in line with the TV aerial downlead (for the door camera), with no concept of channel clashes, signal levels, etc. Eventually the Newcastle firms would send for a local aerial guy, presumably taking pot luck in the Yellow Pages. Bill |
connecting coaxial inside a wall plate for TV
On 13/04/2019 11:28, harry wrote:
Some years ago, I came across a distribution system for some sheltered housing in Farnborough which was maintained by a firm in Newxcatle upon Tyne. There's one then. I 'spect most installers don't go more then ten or fifteen miles for a job. I don't think you actually know anything about this industry. Do you realise that we are talking about jobs worth thousands? Bill. |
connecting coaxial inside a wall plate for TV
In article ,
Bill Wright wrote: On 13/04/2019 09:37, charles wrote: Who's going to travel 200 miles to install a TV aerial? Some years ago, I came across a distribution system for some sheltered housing in Farnborough which was maintained by a firm in Newxcatle upon Tyne. Yes, some years ago there was a Newcastle firm that had contracts with property management firms and housing associations all over the UK. I don't remember the name. They tended to send their own electricians (who were electricians pure and simple) to fix problems with TV distribution systems. They also used them to install CCTV. These guys routinely fitted a modulator in line with the TV aerial downlead (for the door camera), with no concept of channel clashes, signal levels, etc. Eventually the Newcastle firms would send for a local aerial guy, presumably taking pot luck in the Yellow Pages. That sounds about right. All I can remember about the system was that the Band II aerial had its back towards Wrotham. The 'best' electrician job I saw was at the BBC pavilion at the Royal Welsh Showground, Incoming aerial fed into a 2 outlet amplifier and a dozen sockets fed in a ring from one outlet to the other! -- from KT24 in Surrey, England "I'd rather die of exhaustion than die of boredom" Thomas Carlyle |
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