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Electrical problem

Question asked by MUKUND229 in #Electrical on Aug 14, 2009
MUKUND229
MUKUND229 · Aug 14, 2009
Member of CrazyEngineers
Dear freinds,
I have a very typical problem at home re electrical appliances.Brief description: When my radio is on AM station & at the same time I put on the tube light having electrionic choke there is lot of disturbace in the radio & I have to put it off.There is proper earthing to the radio by a seperate wire.When I had normal choke this problem was not there.Due to this I cannot listen to radio AM stations in the post evening hours.Surprisingly as I mentioned FM stations are not having this problem.
Can anybody throw light on this phenomena & suggest a workable remedy Posted in: #Electrical
Munguti
Munguti · Aug 14, 2009
Member of CrazyEngineers
MUKUND229
Dear freinds,
I have a very typical problem at home re electrical appliances.Brief description: When my radio is on AM station & at the same time I put on the tube light having electrionic choke there is lot of disturbace in the radio & I have to put it off.There is proper earthing to the radio by a seperate wire.When I had normal choke this problem was not there.Due to this I cannot listen to radio AM stations in the post evening hours.Surprisingly as I mentioned FM stations are not having this problem.
Can anybody throw light on this phenomena & suggest a workable remedy
AM is very susceptible to noise due to two major reasons.
1. the frequency range of most of the noise produced is within the frequency range allocated for AM radio broadcast for radio Long wave it is 148.5 kHz–283.5 kHz,Medium wave is 520 kHz–1,610 kHz and Short wave is 1.711 MHz–30.0 MHz. FM uses frequencies higher up the frequency ranges 88MHz - 108MHz.
2. Noise mainly amplitude modulates the carrier, which is also the same scheme used to modulate the transmission, this will therefore interefere with the original signal, in FM the amplitude is clipped since its unimportant for the intelligent reception of the signal.
MUKUND229
MUKUND229 · Aug 17, 2009
Member of CrazyEngineers
Thanks for the response.I would appreciate if anyone could suggect the workable/feasible remedy on this.
Mukund
saurabh2486
saurabh2486 · Aug 17, 2009
Member of CrazyEngineers
try turning on ur radio at a suitable distance from ur tubelight choke this might help
Munguti
Munguti · Aug 17, 2009
Member of CrazyEngineers
Try putting a matallic mesh arround your choke light, might help.
Munguti
Munguti · Aug 17, 2009
Member of CrazyEngineers
sorry metallic
kashish0711
kashish0711 · Aug 19, 2009
Member of CrazyEngineers
The noise is caused by the high frequency pulses or you can say (RADIO WAVES).

Chokes are installed to "filter out" this high frequency noise. Chokes are simple inductors.You can buy them from market, many different types of chokes are available in the market.

Or for a home-made choke, Just take a pen, and use its body as a core and wound magnetic wire over it creating a core-less coil. Then just connect the choke like in the diagram below:

[​IMG]





Ooops I forgot to change the date on my logo lolz.


Good Luck

Here is an example. 😀

These are 2 home made chokes

[​IMG]

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