Ats-20 Radio Manual

Turn the radio off and on again.

: For hardware enthusiasts, technical layouts and wiring diagrams are frequently shared on GitHub repository discussions . im looking for ATS-20 Diagram

Since the ATS-20 shares architecture with the more advanced ATS-25, their manuals are often used interchangeably for firmware-related functions:

Built-in 8-ohm speaker and 3.5mm stereo headphone jack

Press the button once. The volume level indicator on the screen will flash. ats-20 radio manual

| Feature | Details | |---------|---------| | | FM: 76.0 – 108.0 MHz ; LW: 100 – 510 kHz ; MW: 520 – 1720 kHz ; SW: 1.72 – 26.2 MHz (continuous) | | Modes | FM, AM (MW/SW), SSB (LSB/USB), CW | | Display | 0.96‑inch OLED | | Tuning steps | 1 kHz, 5 kHz, 10 kHz (depending on band / firmware) | | Audio filter bandwidths | 0.5, 1, 1.2, 2.2, 3, 4 kHz | | Pre‑configured bands | 22 commercial and ham‑radio bands | | Antenna connector | SMA | | Audio outputs | 3.5 mm headphone jack + 1.5 W speaker output (8 Ω) | | Battery | Internal 3.6 V 800 mAh polymer lithium (rechargeable via USB) | | Arduino core | ATmega328P (embedded Arduino Nano) | | Firmware updates | Via Mini‑USB port (not the USB charging port) |

The device features an OLED display and a set of eight buttons, typically running firmware version 3.0.7g by PU2CLR.

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.

Reset the EEPROM by holding the encoder button while turning the device on. Turn the radio off and on again

For charging the internal battery and updating firmware.

Toggle it to the "OFF" position when finished to prevent draining the battery. Adjusting the Volume

Many users flash the with custom firmware (like ATS_EX or ATS20+ ) to unlock features found in superior models. Common advanced features include:

With the help of this manual, you should be able to: The volume level indicator on the screen will flash

522 – 1620 kHz (9 kHz steps) or 520 – 1710 kHz (10 kHz steps) LW: 153 – 513 kHz

Complete Guide and Manual for the ATS-20 SI4732 Radio Receiver