Naked Science Forum

Non Life Sciences => Technology => Topic started by: thedoc on 10/04/2014 15:30:01

Title: What happens to a TV if current is applied to an aerial?
Post by: thedoc on 10/04/2014 15:30:01

Peter Steadman asked the Naked Scientists:
   
On an idiot abroad, the presenter when to a nudist beach in Brazil. When the naked man got exited they go in to the sea to cool off. What do you do in the studio?

I've just found your show, wooo, while trying to find out what happens to other connected TV's if you put a small current through the aerial socket, would it jam the signal in next doors flat or, would I have to build a transmitting jammer? Could you help? I was thinking of 14v from a power pack. Or would this go unnoticed like a fart in a jacuzzi

Peace, Peter Steadman in Shrewsbury.

What do you think?

Title: Re: What happens to a TV if current is applied to an aerial?
Post by: RD on 10/04/2014 17:32:50

Quote from: Peter Steadman on 10/04/2014 15:30:01

... while trying to find out what happens to other connected TV's if you put a small current through the aerial socket, would it jam the signal in next doors flat or, would I have to build a transmitting jammer? Could you help? I was thinking of 14v from a power pack.

You'd have to transmit at the same frequency/frequencies you were trying to block,
which for TV are in the hundreds of MegaHertz range.

In the UK there are regulations against transmitting without a license , ( and your neighbours can probably watch TV over the internet anyway ), you'll have to find another way to get back at them  [:)]

Safety Note: applying strong current to TV receiver cable could cause the cable to catch fire.

 

Title: Re: What happens to a TV if current is applied to an aerial?
Post by: syhprum on 10/04/2014 19:55:46

Up until the 1990,s British TV,s had the most crude power supply systems with the mains supply connected directly to the chassis of the receiver and no isolating transformer.
Isolation for the aerial cable was provided by a capacitor unit near the aerial socket but these frequently became damaged, all was just about safe if the TV was connected to a non reversible power socket in such a manner that the chassis was connected to the neutral side but the arrangement tended to get disturbed by owners extending the lead or wiring plugs incorrectly.
It was not unheard of for the aerial to be at live mains potential and aerial riggers had to keep this in mind