The antenna for the radio is the headphones wire. The twisted copper wire can act not only transporting the sound to the headphones, but receiving the signal for the radio. The two applications work in different frequencies, the radio works on Megahertz and the sound in Kilohertz.
You will have to revise the soldering of the 3.5 mm jack, because it's probably that the contacts are bad. They could work for sending the sound to the headphones, because the power of the signal is very strong. However, the power of the radio signal is very weak, and the contacts must be very good to get a good signal.
134 views
Usually answered in minutes!
×