Voice of Vietnam interval signal received by my RDA5807M FM receiver circuit

Frequency: 94 MHz (VOV1 Ho Chi Minh city)
Transmitter site: Quán Tre broadcasting tower (distance: 15 km)
Transmitter power: ? kW

The audio is very bad since the tuner IC itself has low sensitivity and the audio amplifier IC used (LM386) needs very good ground for good audio quality (cry in breadboarding).
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