how to make a strong 50hz atmosphere

i want to test my device in the presence of 50hz signal, now the problem is am not able to get same response over time.(i am powering the device using the batery, which i do not want to change)
so the other option is to have a strong 50hz environment, so i tested it by keeping the mobile and laptop chargers, near the device. but i was not able to reproduce the same results over time, so i made a solenoid like structure , see the image, which also gives different results over time.

can someone tell me how to get a strong and constant 50hz atmosphere.

Are you saying that through this spiral does an electric current pass (ie the wiring is part of some circuit consuming power), or is it just a helical-like antenna ? If you want a 'stable' 50Hz noise source, I would recommend to make some circuit that you could predict the electromagnetic flow and even tune it. An open circuit likely to do not act in a predictable fashion, not only issuing EMI, but also being interferred by surrounding environment, passively and actively.

I think if you look at practical wireless chargers, you will see they operate more at 240 KHz type frequency range

I believe an old-fashioned tv set (crt type) produces tons of EMI. That's how I read from an instrument I purchased on Ebay just like this:

A tv produces many frequencies of interference. I suppose some is magnetic and some is EM.

Do you want a strong magnetic field? Then your coil needs to have a lot of Amperes going through it. A degaussing coil could be suitable. Or even a tape head demagnetizer. Both items are intended for brief usage only.

yes i connected a bulb of 100w at the end of this.



yes thought of that but it is not suitable for 50hz.

Find the nearest 500kV transmission line in your area, look on google earth for a good place to park under it or near it, then conduct your measurement. You will have tons of 50Hz :)

Hi,

A magnetic field needs current. And it needs windings.
The more current and the more windings the stronger the field.
Your bottle most probaly is made from aluminum. I'd prefer a plastic tube.

An electrical field needs voltage. You may use two metal plates, but isolate them to protect you from the risk of electrical shock.

Klaus