Log in
Register
Menu
Log in
Register
Home
What's new
Latest activity
Authors
Forums
New posts
Search forums
What's new
New posts
Latest activity
Members
Current visitors
New posts
Search forums
Menu
Log in
Register
Install the app
Install
Forums
Miscellaneous Sections
Tech Head - The Technology Section
Computer Discussion
Is this device available in the UK ?
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Message
<blockquote data-quote="Vipersan" data-source="post: 651806" data-attributes="member: 325666"><p>Hi m8's ..</p><p>this passage borrowed from a website discussion I found...</p><p>>></p><p>If you live in a street, your house and your immediate neighbours are plumbed into adjacent phases of the mains; and there's no way that any frequency higher than a few hundred Hz is going to get through the thwacking great three-phase transformer in the sub-station. Somebody three doors down possibly could see your network; but electricity meters are inductive and block out high frequencies. Mechanical ones because they have to be inductive in order to work, and electronic ones because they have to be inductive in order not to be ..... er ..... misled by spurious signals on the wires (imagine the horror if someone's electricity meter were accidentally to clock up credit that hadn't been paid for because someone clicked a piezo lighter next to it).</p><p></p><p>RF coupling is an unlikely prospect. The houses in any street probably were rewired at different times, so the cables are unlikely to be exactly back-to-back. Then there are at least two layers of brick between any two houses; call it 225mm. In modern houses with cavity walls, it will be more. The live conductor is adjacent to the neutral and earth, which are joined at the meter if you live in a city, and certainly less than 10mm. away. I'd say it ought to make a fairly effective shield.</p><p>>></p><p></p><p>In this case the user is worried that the signal might 'leak' outside his property..</p><p>My worry is that it _wont_ ..</p><p>Looks like I'm back to my origional plan ...transmission via coax..</p><p>oh ..well</p><p>VS</p></blockquote><p></p>
[QUOTE="Vipersan, post: 651806, member: 325666"] Hi m8's .. this passage borrowed from a website discussion I found... >> If you live in a street, your house and your immediate neighbours are plumbed into adjacent phases of the mains; and there's no way that any frequency higher than a few hundred Hz is going to get through the thwacking great three-phase transformer in the sub-station. Somebody three doors down possibly could see your network; but electricity meters are inductive and block out high frequencies. Mechanical ones because they have to be inductive in order to work, and electronic ones because they have to be inductive in order not to be ..... er ..... misled by spurious signals on the wires (imagine the horror if someone's electricity meter were accidentally to clock up credit that hadn't been paid for because someone clicked a piezo lighter next to it). RF coupling is an unlikely prospect. The houses in any street probably were rewired at different times, so the cables are unlikely to be exactly back-to-back. Then there are at least two layers of brick between any two houses; call it 225mm. In modern houses with cavity walls, it will be more. The live conductor is adjacent to the neutral and earth, which are joined at the meter if you live in a city, and certainly less than 10mm. away. I'd say it ought to make a fairly effective shield. >> In this case the user is worried that the signal might 'leak' outside his property.. My worry is that it _wont_ .. Looks like I'm back to my origional plan ...transmission via coax.. oh ..well VS [/QUOTE]
Insert quotes…
Verification
Post reply
Forums
Miscellaneous Sections
Tech Head - The Technology Section
Computer Discussion
Is this device available in the UK ?
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.
Accept
Learn more…
Top