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Terrestrial Broadcasting
Terrestrial Television, Digital and Analogue
Zapped through the aerial cable!!!
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<blockquote data-quote="PoloMint" data-source="post: 240717" data-attributes="member: 175235"><p>A slight shock from an aerial or metal part of a receiver/VCR/DVD player isn’t unusual. As Analoguesat says most of these boxes aren’t earthed, and so have a ‘floating earth’ that can be 50v or so different to ‘proper’ earth. However the current is tiny – so it’s harmless (in theory). Also if you have one unit earthed (such as an amplifier) this will normally be enough to prevent this in all connected devices. I believe the lack of earthing can be a problem in big communal systems when the entire system is not earthed and allowed to float – until someone touches an aerial and it’s all drained through them. I think that’s why they are earthed – maybe someone will correct/confirm this.</p><p></p><p>One problem with having all devices earthed, especially aerials and devices on different power lines, is it can cause an earth loop, resulting in a very annoying background hum on any sound equipment. (Most easily resolved by cutting the earth line to the amp, destroying the loop, and destroying the earthing to the amp – not recommended).</p><p></p><p>This really doesn’t answer your question about earthing it 2CV, take Analoguesats advice and wait till someone with proper electrical knowledge comes along...</p></blockquote><p></p>
[QUOTE="PoloMint, post: 240717, member: 175235"] A slight shock from an aerial or metal part of a receiver/VCR/DVD player isn’t unusual. As Analoguesat says most of these boxes aren’t earthed, and so have a ‘floating earth’ that can be 50v or so different to ‘proper’ earth. However the current is tiny – so it’s harmless (in theory). Also if you have one unit earthed (such as an amplifier) this will normally be enough to prevent this in all connected devices. I believe the lack of earthing can be a problem in big communal systems when the entire system is not earthed and allowed to float – until someone touches an aerial and it’s all drained through them. I think that’s why they are earthed – maybe someone will correct/confirm this. One problem with having all devices earthed, especially aerials and devices on different power lines, is it can cause an earth loop, resulting in a very annoying background hum on any sound equipment. (Most easily resolved by cutting the earth line to the amp, destroying the loop, and destroying the earthing to the amp – not recommended). This really doesn’t answer your question about earthing it 2CV, take Analoguesats advice and wait till someone with proper electrical knowledge comes along... [/QUOTE]
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Terrestrial Broadcasting
Terrestrial Television, Digital and Analogue
Zapped through the aerial cable!!!
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