No radio signals with antenna
I tried following your link, but there was nothing there. So my advice can only be very general.
1:  741 opamps are only good to about 20KHz, depending on how much gain you have (more gain = less bandwidth). While there are a few Low Frequency (LF) stations, you'd be better off using a different amplifier.
2: Opamps like the 741 use a "split rail". You need a positive supply, and a negative supply, and zero volts (or ground).
3: A capacitor on its own is not enough - you need a tuned circuit. Hopefully, this was on your missing circuit diagram. You need a coil and a tuning capacitor, in parallel. Adjusting the capacitor tunes the radio. As written, the only thing you might hear is electric noise generated by a thunderstorm.