He followed the instructions. He spun the dial backward. 150 kHz. 100 kHz. 50 kHz. The static deepened into a low, rhythmic thrum. It wasn't a station. It sounded like a heartbeat, slow and planetary. He felt a strange vertigo, as if the concrete floor beneath him was rotating.
To protect the sensitive Si4732 chip from static discharge or lightning‑induced spikes, many users add two BAT41 Schottky diodes back‑to‑back across the antenna input . If you are not comfortable opening the radio, you can install the diodes inside a BNC plug with a crocodile clip – then connect your wire antenna to the clip. ats-20 radio manual
After uploading a major new firmware (like ATS_EX), you should reset the EEPROM to clear any old configuration data. To do this: . He followed the instructions
The battery may be critically low. Connect a Type-C charger. 100 kHz