New posts in Radio

When a AM radio wave reaches the antenna does the signal need to be in a closed circuit to be amplified?

Should I replace these resistors on my vintage radio?

North American Regulations on 433MHz Radio

Why can only analog signals pass through air (wireless channel)?

Can unpowered radio work without ground connection?

What kind of electronic device is this?

Are there any open / unrestricted radio frequencies that are free for any use?

Why do EM waves with longer wavelengths propagate longer distances?

Short range - low bitrate data transmission under water

Can a radio transmitter somehow detect the number of receivers in its area?