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Extending wi-fi
My BT Home Hub 3 running on Infinity is downstairs in my study. The wi-fi
from that reaches all parts of the house using my DELL laptop. I take a feed up to my TV in the drawing room on the first floor using Home Plugs and that works well - HD transfers perfectly. Then I bought an iPad which depends on wi-fi but cannot pick up the router in the front part of the house and certainly not upstairs. So I would like something to plug into a 13A socket to pick up the Home Plug signal and broadcast that as wi-fi so I can use the iPad while watching TV. BT sell a kit that does that for £89 - but people here may know of a better answer. I may lay in a Cat 5 cable if it comes to that but before I start burrowing under floors, I would welcome advice. Geoff |
Extending wi-fi
In message , Geoff Pearson
writes My BT Home Hub 3 running on Infinity is downstairs in my study. The wi-fi from that reaches all parts of the house using my DELL laptop. I take a feed up to my TV in the drawing room on the first floor using Home Plugs and that works well - HD transfers perfectly. Then I bought an iPad which depends on wi-fi but cannot pick up the router in the front part of the house and certainly not upstairs. So I would like something to plug into a 13A socket to pick up the Home Plug signal and broadcast that as wi-fi so I can use the iPad while watching TV. BT sell a kit that does that for £89 - but people here may know of a better answer. I may lay in a Cat 5 cable if it comes to that but before I start burrowing under floors, I would welcome advice. Those extender repeater things seem to work OK (and don't require ant wiring). https://www.google.co.uk/#q=wifi+extender [Anything which uses the mains wiring to transmit data is an abomination to the users of the RF spectrum, and should be avoided at all costs.] -- Ian |
Extending wi-fi
On Wed, 1 Jan 2014 15:22:34 UTC, "Geoff Pearson"
wrote: My BT Home Hub 3 running on Infinity is downstairs in my study. The wi-fi from that reaches all parts of the house using my DELL laptop. I take a feed up to my TV in the drawing room on the first floor using Home Plugs and that works well - HD transfers perfectly. Then I bought an iPad which depends on wi-fi but cannot pick up the router in the front part of the house and certainly not upstairs. So I would like something to plug into a 13A socket to pick up the Home Plug signal and broadcast that as wi-fi so I can use the iPad while watching TV. BT sell a kit that does that for œ89 - but people here may know of a better answer. I may lay in a Cat 5 cable if it comes to that but before I start burrowing under floors, I would welcome advice. Develo have a model that does just that - Don't know how compatable it is with other home plugs though -- Regards Dave Saville |
Extending wi-fi
"Ian Jackson" wrote
in message ... In message , Geoff Pearson writes My BT Home Hub 3 running on Infinity is downstairs in my study. The wi-fi from that reaches all parts of the house using my DELL laptop. I take a feed up to my TV in the drawing room on the first floor using Home Plugs and that works well - HD transfers perfectly. Then I bought an iPad which depends on wi-fi but cannot pick up the router in the front part of the house and certainly not upstairs. So I would like something to plug into a 13A socket to pick up the Home Plug signal and broadcast that as wi-fi so I can use the iPad while watching TV. BT sell a kit that does that for £89 - but people here may know of a better answer. I may lay in a Cat 5 cable if it comes to that but before I start burrowing under floors, I would welcome advice. Those extender repeater things seem to work OK (and don't require ant wiring). https://www.google.co.uk/#q=wifi+extender [Anything which uses the mains wiring to transmit data is an abomination to the users of the RF spectrum, and should be avoided at all costs.] Better still, if you have an old wi-fi router connect up to it and see if its software offers a repeat facility which will do the same thing. Alternatively. if you can get a CAT5 to a suitable place some routers can be configured as access points which will also do the job. Having said all that iPads are not notably deaf so it would be worth checking (if you can) that the unit is not loosing connection as you move around and trying to log on to someone elses router. It is also possible that your router is deaf. You could try a fixed IP behind the NAT and see if it will then hold on? -- Woody harrogate three at ntlworld dot com |
Extending wi-fi
On 01/01/2014 15:22, Geoff Pearson wrote:
My BT Home Hub 3 running on Infinity is downstairs in my study. The wi-fi from that reaches all parts of the house using my DELL laptop. I take a feed up to my TV in the drawing room on the first floor using Home Plugs and that works well - HD transfers perfectly. Then I bought an iPad which depends on wi-fi but cannot pick up the router in the front part of the house and certainly not upstairs. So I would like something to plug into a 13A socket to pick up the Home Plug signal and broadcast that as wi-fi so I can use the iPad while watching TV. BT sell a kit that does that for £89 - but people here may know of a better answer. I may lay in a Cat 5 cable if it comes to that but before I start burrowing under floors, I would welcome advice. Geoff Use a spare router with DHCP disabled. Make sure that the local IP address does not conflict with that of your Home Hub. - I have a collection of 'free' routers. -- Michael Chare |
Extending wi-fi
On 01/01/2014 16:21, Dave Saville wrote:
On Wed, 1 Jan 2014 15:22:34 UTC, "Geoff Pearson" wrote: My BT Home Hub 3 running on Infinity is downstairs in my study. The wi-fi from that reaches all parts of the house using my DELL laptop. I take a feed up to my TV in the drawing room on the first floor using Home Plugs and that works well - HD transfers perfectly. Then I bought an iPad which depends on wi-fi but cannot pick up the router in the front part of the house and certainly not upstairs. So I would like something to plug into a 13A socket to pick up the Home Plug signal and broadcast that as wi-fi so I can use the iPad while watching TV. BT sell a kit that does that for œ89 - but people here may know of a better answer. I may lay in a Cat 5 cable if it comes to that but before I start burrowing under floors, I would welcome advice. Develo have a model that does just that - Don't know how compatable it is with other home plugs though +1 I've got a set of these - which work pretty well: http://www.maplin.co.uk/p/devolo-dla...er-plugs-n51qg Each of the wireless extender plugs acts as a hot-spot, and also has an ethernet socket which you can use for connecting to another wired device. You can add further wireless extenders, and configure them all with the same SSID and passphrase - so that you can use wireless devices seamlessly from room to room. Since you've already got powerline adapters, you can buy just one Devolo wireless extender - which may well work with your existing kit. [Visit the Devolo site for compatibility information]. -- Cheers, Roger ____________ Please reply to Newsgroup. Whilst email address is valid, it is seldom checked. |
Extending wi-fi
Ian Jackson wrote:
[Anything which uses the mains wiring to transmit data is an abomination to the users of the RF spectrum, and should be avoided at all costs.] The OP might not care about the radio ham next door. In fact he might regard him as an abomination to be avoided at all costs. Bill |
Extending wi-fi
In message , Bill Wright
writes Ian Jackson wrote: [Anything which uses the mains wiring to transmit data is an abomination to the users of the RF spectrum, and should be avoided at all costs.] The OP might not care about the radio ham next door. In fact he might regard him as an abomination to be avoided at all costs. If God had intended man to transmit high-speed data over the mains, he would have made man decide that it was a good idea for the mains to be balanced, and to be wired using CAT5 cable. -- Ian |
Extending wi-fi
That would be some thick cat5e cable carrying up to 32A of current on up to eight conductors.....
:-) And that's before even thinking about PoE...... |
Extending wi-fi
|
Extending wi-fi
Ian Jackson wrote:
If God had intended man to transmit high-speed data over the mains, he would have made man decide that it was a good idea for the mains to be balanced, and to be wired using CAT5 cable. Yes. CAT5 rated at 100A. Bill |
Extending wi-fi
"Bill Wright" wrote in message ... Ian Jackson wrote: [Anything which uses the mains wiring to transmit data is an abomination to the users of the RF spectrum, and should be avoided at all costs.] The OP might not care about the radio ham next door. In fact he might regard him as an abomination to be avoided at all costs. Bill I have been a licensed radio amateur since 1968: GM8BHR. Geoff |
Extending wi-fi
On 01/01/2014 21:19, Ian Jackson wrote:
If God had intended man to transmit high-speed data over the mains, he would have made man decide that it was a good idea for the mains to be balanced, and to be wired using CAT5 cable. Well, at least God seemed to apply some of that to telephone cables -- Mark Please replace invalid and invalid with gmx and net to reply. |
Extending wi-fi
Seconded about the mains transmitted internet. I got rid of some old school
ones but in recent months some new ones have popped up that sound like a fast ticking over car and every few seconds like a fart which is loud enough to affect medium wave strong signals. They do filter the ham bands but shock horror, some of us want to tune around to other material. as for boosters, I see BT do one, as mentioned, but one thing to bear in mind about the radio solution is that a booster normal uses yet another channel, and in some areas congestion and interference are so bad connections drop out all the time. Brian -- From the Sofa of Brian Gaff Reply address is active "Ian Jackson" wrote in message ... In message , Geoff Pearson writes My BT Home Hub 3 running on Infinity is downstairs in my study. The wi-fi from that reaches all parts of the house using my DELL laptop. I take a feed up to my TV in the drawing room on the first floor using Home Plugs and that works well - HD transfers perfectly. Then I bought an iPad which depends on wi-fi but cannot pick up the router in the front part of the house and certainly not upstairs. So I would like something to plug into a 13A socket to pick up the Home Plug signal and broadcast that as wi-fi so I can use the iPad while watching TV. BT sell a kit that does that for £89 - but people here may know of a better answer. I may lay in a Cat 5 cable if it comes to that but before I start burrowing under floors, I would welcome advice. Those extender repeater things seem to work OK (and don't require ant wiring). https://www.google.co.uk/#q=wifi+extender [Anything which uses the mains wiring to transmit data is an abomination to the users of the RF spectrum, and should be avoided at all costs.] -- Ian |
Extending wi-fi
In message , Brian Gaff
writes Seconded about the mains transmitted internet. I got rid of some old school ones but in recent months some new ones have popped up that sound like a fast ticking over car and every few seconds like a fart which is loud enough to affect medium wave strong signals. They do filter the ham bands but shock horror, some of us want to tune around to other material. Modern one are supposed to notch out the amateur bands - but it's not all of the bands. And it's only a matter of time before this requirement starts to be conveniently forgotten in the interests of increasing the bandwidth. Also, I think there are proposals to increase the transmit power levels, which will tend to make any notch filtering inadequate. as for boosters, I see BT do one, as mentioned, but one thing to bear in mind about the radio solution is that a booster normal uses yet another channel, and in some areas congestion and interference are so bad connections drop out all the time. I might be wrong, but I think that boosters actually use the same channel (presumably on a time-share basis?). If so, I guess this slows things down. [Expert advice needed.] -- Ian |
Extending wi-fi
"Brian Gaff" wrote in message ... Seconded about the mains transmitted internet. I got rid of some old school ones but in recent months some new ones have popped up that sound like a fast ticking over car and every few seconds like a fart which is loud enough to affect medium wave strong signals. They do filter the ham bands but shock horror, some of us want to tune around to other material. as for boosters, I see BT do one, as mentioned, but one thing to bear in mind about the radio solution is that a booster normal uses yet another channel, and in some areas congestion and interference are so bad connections drop out all the time. Brian -- From the Sofa of Brian Gaff Reply address is active "Ian Jackson" wrote in message ... In message , Geoff Pearson writes My BT Home Hub 3 running on Infinity is downstairs in my study. The wi-fi from that reaches all parts of the house using my DELL laptop. I take a feed up to my TV in the drawing room on the first floor using Home Plugs and that works well - HD transfers perfectly. Then I bought an iPad which depends on wi-fi but cannot pick up the router in the front part of the house and certainly not upstairs. So I would like something to plug into a 13A socket to pick up the Home Plug signal and broadcast that as wi-fi so I can use the iPad while watching TV. BT sell a kit that does that for £89 - but people here may know of a better answer. I may lay in a Cat 5 cable if it comes to that but before I start burrowing under floors, I would welcome advice. Those extender repeater things seem to work OK (and don't require ant wiring). https://www.google.co.uk/#q=wifi+extender [Anything which uses the mains wiring to transmit data is an abomination to the users of the RF spectrum, and should be avoided at all costs.] -- Ian It doesn't matter here - my next door neighbour has wi-fi which is barely readable in my house - large stone-built houses - and the next again neighbour is not receivable. So basically I could use all the channels. |
Extending wi-fi
On Thu, 2 Jan 2014 13:08:29 +0000, Ian Jackson
wrote: I might be wrong, but I think that boosters actually use the same channel (presumably on a time-share basis?). If so, I guess this slows things down. [Expert advice needed.] For what it's worth, I've set up an Edimax 7228 configured as a wireless repeater on an ADSL connection that gives a download speed of about 11Mb/s direct. The repeater does extend the coverage area to the back garden, which is what it was installed for, but the download speed usually tests around 5Mb/s. I don't know if the speed reduction is a characteristic of this particular unit or wireless repeaters in general, as I haven't yet had the opportunity to test any others. Rod. |
Extending wi-fi
Geoff Pearson wrote:
The OP might not care about the radio ham next door. In fact he might regard him as an abomination to be avoided at all costs. Bill I have been a licensed radio amateur since 1968: GM8BHR. Geoff And does your neighbour regard you as an abomination? Do you covet his wife, anything like that? Bill |
Extending wi-fi
On Thu, 2 Jan 2014 13:08:29 +0000, Ian Jackson
wrote: In message , Brian Gaff writes Seconded about the mains transmitted internet. I got rid of some old school ones but in recent months some new ones have popped up that sound like a fast ticking over car and every few seconds like a fart which is loud enough to affect medium wave strong signals. They do filter the ham bands but shock horror, some of us want to tune around to other material. Modern one are supposed to notch out the amateur bands - but it's not all of the bands. And it's only a matter of time before this requirement starts to be conveniently forgotten in the interests of increasing the bandwidth. Also, I think there are proposals to increase the transmit power levels, which will tend to make any notch filtering inadequate. as for boosters, I see BT do one, as mentioned, but one thing to bear in mind about the radio solution is that a booster normal uses yet another channel, and in some areas congestion and interference are so bad connections drop out all the time. I might be wrong, but I think that boosters actually use the same channel (presumably on a time-share basis?). If so, I guess this slows things down. [Expert advice needed.] Yes. 1:1 time shared between source and target, so speed halved. -- Dave W |
Extending wi-fi
In message , Dave W
writes On Thu, 2 Jan 2014 13:08:29 +0000, Ian Jackson wrote: In message , Brian Gaff writes Seconded about the mains transmitted internet. I got rid of some old school ones but in recent months some new ones have popped up that sound like a fast ticking over car and every few seconds like a fart which is loud enough to affect medium wave strong signals. They do filter the ham bands but shock horror, some of us want to tune around to other material. Modern one are supposed to notch out the amateur bands - but it's not all of the bands. And it's only a matter of time before this requirement starts to be conveniently forgotten in the interests of increasing the bandwidth. Also, I think there are proposals to increase the transmit power levels, which will tend to make any notch filtering inadequate. as for boosters, I see BT do one, as mentioned, but one thing to bear in mind about the radio solution is that a booster normal uses yet another channel, and in some areas congestion and interference are so bad connections drop out all the time. I might be wrong, but I think that boosters actually use the same channel (presumably on a time-share basis?). If so, I guess this slows things down. [Expert advice needed.] Yes. 1:1 time shared between source and target, so speed halved. I think my laptop says that that it links to my wireless router at 54Mb/s, so a booster would cut this to 27Mb/s. As my internet downstream is only 1.5Mb/s, I guess an extender wouldn't be noticed. I have actually installed an extender (a Netgear WN3000) for a friend who lives not far from the exchange, and whose internet speed will be far faster than mine. There have never been any reports of speed problems. -- Ian |
Extending wi-fi
"Bill Wright" wrote in message ... Geoff Pearson wrote: The OP might not care about the radio ham next door. In fact he might regard him as an abomination to be avoided at all costs. Bill I have been a licensed radio amateur since 1968: GM8BHR. Geoff And does your neighbour regard you as an abomination? Do you covet his wife, anything like that? Bill Bill, sorry no. I am homosexual and fancy my neighbour too much to even look at his wife. |
Extending wi-fi
On Thu, 2 Jan 2014 23:00:04 +0000, Ian Jackson
wrote: I think my laptop says that that it links to my wireless router at 54Mb/s, so a booster would cut this to 27Mb/s. It may indicate it has connected at those speeds, but try transferring a few large files between computers and measuring the transfer speed you actually get. As you point out, this isn't important if it's a lot faster than your internet speed and internet access is the main use, but it might be a consideration if you want to transfer files between local devices, such as to and from a network backup drive. Rod. |
Extending wi-fi
Geoff Pearson wrote:
And does your neighbour regard you as an abomination? Do you covet his wife, anything like that? Bill Bill, sorry no. I am homosexual and fancy my neighbour too much to even look at his wife. Oh well, I guess that counts. Strewth, I found myself looking admiringly at a lass this morning and realised that I am FOUR TIMES her age! Actually I shouldn't have even been thinking such thoughts (even though I swear my appreciation of the girl was purely aesthetic) because this was in church, at a funeral. But the vicar was in maximum drone mode. I considered having a look at the news or whatever on my phone but thought it might cause disapproval. I did intend to have a picture taken of me in a collar and tie and suit, and put it on dropbox for you all to laugh at. I was going to caption it 'Up before the beak?' but I forgot and now I've got changed. On the way out of the crematorium I think someone had left their handbrake on. I said, 'That's a horrible smell!'. Hil said, 'It must be Joan.' At the bunfight afterwards the sixteen-year-old had changed into a very pretty dress. I complimented her on it. Bill |
Extending wi-fi
On Wednesday, January 1, 2014 3:22:34 PM UTC, Geoff Pearson wrote:
My BT Home Hub 3 running on Infinity is downstairs in my study. The wi-fi from that reaches all parts of the house using my DELL laptop. I take a feed up to my TV in the drawing room on the first floor using Home Plugs and that works well - HD transfers perfectly. Then I bought an iPad which depends on wi-fi but cannot pick up the router in the front part of the house and certainly not upstairs. So I would like something to plug into a 13A socket to pick up the Home Plug signal and broadcast that as wi-fi so I can use the iPad while watching TV. BT sell a kit that does that for �89 - but people here may know of a better answer. I may lay in a Cat 5 cable if it comes to that but before I start burrowing under floors, I would welcome advice. Geoff If you have an android 'phone get the Wi-Fi Analyzer app. It shows which signals are available and their strength. I find it very useful for this sort of thing as you can test signal strength around the house. We did find with some visitors who had apple kit that if they logged on initially close to the router, then they could alsways log on again further away. Why I do not know. Jonathan |
Extending wi-fi
"Jonathan" wrote in message ... On Wednesday, January 1, 2014 3:22:34 PM UTC, Geoff Pearson wrote: My BT Home Hub 3 running on Infinity is downstairs in my study. The wi-fi from that reaches all parts of the house using my DELL laptop. I take a feed up to my TV in the drawing room on the first floor using Home Plugs and that works well - HD transfers perfectly. Then I bought an iPad which depends on wi-fi but cannot pick up the router in the front part of the house and certainly not upstairs. So I would like something to plug into a 13A socket to pick up the Home Plug signal and broadcast that as wi-fi so I can use the iPad while watching TV. BT sell a kit that does that for �89 - but people here may know of a better answer. I may lay in a Cat 5 cable if it comes to that but before I start burrowing under floors, I would welcome advice. Geoff If you have an android 'phone get the Wi-Fi Analyzer app. It shows which signals are available and their strength. I find it very useful for this sort of thing as you can test signal strength around the house. We did find with some visitors who had apple kit that if they logged on initially close to the router, then they could alsways log on again further away. Why I do not know. Jonathan but you can't download from Google Apps on an iPad. Maddening |
Extending wi-fi
On Fri, 3 Jan 2014 16:04:17 -0000, "Geoff Pearson"
wrote: If you have an android 'phone get the Wi-Fi Analyzer app. It shows which signals are available and their strength. I find it very useful for this sort of thing as you can test signal strength around the house. We did find with some visitors who had apple kit that if they logged on initially close to the router, then they could alsways log on again further away. Why I do not know. Jonathan but you can't download from Google Apps on an iPad. Maddening You could try "InSSIDer" instead. According to the website it's available for the Mac, so presumably other Apple devices too. Rod. |
Extending wi-fi
On Fri, 03 Jan 2014 17:46:29 +0000, Roderick Stewart
You could try "InSSIDer" instead. According to the website it's available for the Mac, so presumably other Apple devices too. Yes, this is very useful piece of software. I added it when I was getting very variable reults from my wi-fi setup, sometimes working fine, at other times dropping the connection and coming back soon, but mostly just dropping it and leaving me high and dry, usually requiring a re-boot of the computer to get it going again. In my vicinity I have at least 30 other wifi transmissions listed by InSSIDer, often many more, so it is a crowded 2.4GHz envirionment; The problem only resolved itself when one of my immediate neighbours moved out and their Virgin wifi network and its damned repeater was gone. Their repeater tranmitted across six or seven channels, in addition to their main router across three. My recommendation, instal some cable, it's faster, more reliable and much more secure. - Mike |
Extending wi-fi
On Mon, 06 Jan 2014 14:53:12 +0000, Mike Murphy wrote:
My recommendation, instal some cable, it's faster, more reliable and much more secure. Mine too. Unfortunately it's also more work. There's always a catch. Rod. |
Extending wi-fi
"Roderick Stewart" wrote in message ... On Mon, 06 Jan 2014 14:53:12 +0000, Mike Murphy wrote: My recommendation, instal some cable, it's faster, more reliable and much more secure. Mine too. Unfortunately it's also more work. There's always a catch. Rod. OK - how do I plug an iPad into an Ethernet socket? |
Extending wi-fi
On 07/01/2014 07:01, Geoff Pearson wrote:
OK - how do I plug an iPad into an Ethernet socket? With this ? http://store.apple.com/uk/product/MC...hernet-adapter -- Mark Please replace invalid and invalid with gmx and net to reply. |
Extending wi-fi
On 07/01/2014 07:01, Geoff Pearson wrote:
OK - how do I plug an iPad into an Ethernet socket? Scrub the post I just sent, if it appeared on your server, wrong product -- Mark Please replace invalid and invalid with gmx and net to reply. |
Extending wi-fi
Mark Carver wrote:
On 07/01/2014 07:01, Geoff Pearson wrote: how do I plug an iPad into an Ethernet socket? With this ? http://store.apple.com/uk/product/MC...hernet-adapter Now all you need is a USB OTG socket for an iPad :-P |
Extending wi-fi
In article , Ian Jackson
wrote: Modern one are supposed to notch out the amateur bands - but it's not all of the bands. And it's only a matter of time before this requirement starts to be conveniently forgotten in the interests of increasing the bandwidth. Also, I think there are proposals to increase the transmit power levels, which will tend to make any notch filtering inadequate. Also, the domestic mains plus all the equipment attached to it may well have nonlinearity, thus causing intermod to shift power into any 'gaps' that work nicely in a test lab. Also to spray some of it into the band above the range intended. The whole idea of devices using RF over the mains under the pretense that they are "not transmitters" is absurd. Slainte, Jim -- Please use the address on the audiomisc page if you wish to email me. Electronics http://www.st-and.ac.uk/~www_pa/Scot...o/electron.htm Armstrong Audio http://www.audiomisc.co.uk/Armstrong/armstrong.html Audio Misc http://www.audiomisc.co.uk/index.html |
Extending wi-fi
Jim Lesurf wrote:
The whole idea of devices using RF over the mains under the pretense that they are "not transmitters" is absurd. Agreed. How does regulation of this compare with regulation of cable companys, who have cabinets that sometimes leak RF? Bill |
Extending wi-fi
In message , Bill Wright
writes Jim Lesurf wrote: The whole idea of devices using RF over the mains under the pretense that they are "not transmitters" is absurd. Agreed. How does regulation of this compare with regulation of cable companys, who have cabinets that sometimes leak RF? As I'm sure you will know, cable TV systems have to comply with the quite stringent specs in BS1510 and BS1520 (and/or whatever the latest EN successors are). -- Ian |
Extending wi-fi
In article , Bill Wright
wrote: Jim Lesurf wrote: The whole idea of devices using RF over the mains under the pretense that they are "not transmitters" is absurd. Agreed. How does regulation of this compare with regulation of cable companys, who have cabinets that sometimes leak RF? No idea about the cable cabinets. But AIUI OfCom simply classify the home mains RF systems as "not transmitters" and take no real interest beyond that. Jim -- Please use the address on the audiomisc page if you wish to email me. Electronics http://www.st-and.ac.uk/~www_pa/Scot...o/electron.htm Armstrong Audio http://www.audiomisc.co.uk/Armstrong/armstrong.html Audio Misc http://www.audiomisc.co.uk/index.html |
Extending wi-fi
On Tue, 07 Jan 2014 09:21:37 +0000 (GMT), Jim Lesurf
wrote: The whole idea of devices using RF over the mains under the pretense that they are "not transmitters" is absurd. No more absurd than the idea of using RF up to the 25m shortwave band over telephone cables - but I'm able to post this message because it works. Rod. |
Extending wi-fi
In article , Roderick Stewart
wrote: On Tue, 07 Jan 2014 09:21:37 +0000 (GMT), Jim Lesurf wrote: The whole idea of devices using RF over the mains under the pretense that they are "not transmitters" is absurd. No more absurd than the idea of using RF up to the 25m shortwave band over telephone cables - but I'm able to post this message because it works. Not sure that's the same. At least telephone cables are meant to carry signals. Dont they also have a specified impedance, etc, as transmission lines? And are there no specs at all on how much of the net signals they can radiate, etc? If they are as poor as mains home wiring would be at RF I'm amazed it works at all over such long distances compared to inside a home. Whereas home mains wiring has no specs at all for impedance, has many unbalanced spurs, terminates in unpredicatable nonlinear loads, etc. Jim -- Please use the address on the audiomisc page if you wish to email me. Electronics http://www.st-and.ac.uk/~www_pa/Scot...o/electron.htm Armstrong Audio http://www.audiomisc.co.uk/Armstrong/armstrong.html Audio Misc http://www.audiomisc.co.uk/index.html |
Extending wi-fi
In message , Roderick
Stewart writes On Tue, 07 Jan 2014 09:21:37 +0000 (GMT), Jim Lesurf wrote: The whole idea of devices using RF over the mains under the pretense that they are "not transmitters" is absurd. No more absurd than the idea of using RF up to the 25m shortwave band over telephone cables - but I'm able to post this message because it works. And because telephone cables are reasonably well-balanced, it causes very little interference (if at all) to those listening to RF transmissions up to the 25m shortwave band. On the other hand, the mains isn't, and it does. -- Ian |
Extending wi-fi
On 07/01/14 17:26, Ian Jackson wrote:
In message , Roderick Stewart writes On Tue, 07 Jan 2014 09:21:37 +0000 (GMT), Jim Lesurf wrote: The whole idea of devices using RF over the mains under the pretense that they are "not transmitters" is absurd. No more absurd than the idea of using RF up to the 25m shortwave band over telephone cables - but I'm able to post this message because it works. And because telephone cables are reasonably well-balanced, it causes very little interference (if at all) to those listening to RF transmissions up to the 25m shortwave band. On the other hand, the mains isn't, and it does. The telephone wires are explicitly balanced, by being made as twisted pairs. That balances them against environmental asymmetries. The certifications for mains based data links are done with unrealistically ideal wiring installations. |
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