I bought some special ferrite barrels. It looks exactly like a resistor except the center is just a cylinder of ferrite, that has a charcoalish colour.
I think I can use these to suppress EMI or RFI noise.
So far, a PI filter containing a transformer's primary and secondary windings in series as an inductor, and the two capacitors being 1000uF seems to remove some of the noise, and my wall plug cord's location seems to have less of an effect on the radio.
I think adding ferrite barrels can benefit me. I'm thinking I should add them in series with the power supply, so that +ve must go through one barrel, and -ve must go through the other barrel. These barrels have 0 ohms resistance at DC.
Please let me know how I should use the barrels. Thanks.
I think I can use these to suppress EMI or RFI noise.
So far, a PI filter containing a transformer's primary and secondary windings in series as an inductor, and the two capacitors being 1000uF seems to remove some of the noise, and my wall plug cord's location seems to have less of an effect on the radio.
I think adding ferrite barrels can benefit me. I'm thinking I should add them in series with the power supply, so that +ve must go through one barrel, and -ve must go through the other barrel. These barrels have 0 ohms resistance at DC.
Please let me know how I should use the barrels. Thanks.