Ats-20 Radio Manual May 2026
Because the ATS-20 radio manual is not in color, here is what those cryptic icons mean on your screen:
Specify which of the following you want next (no questions asked):
(Using model-specific service manual pages or schematics will enable precise alignment frequencies, component values, and adjustment locations.)
ATS-20 Si4732 Radio Receiver: The Ultimate User Guide The ATS-20 (Si4732) has become a favorite among radio enthusiasts for its portability and impressive range. Whether you are a seasoned "ham" or a newcomer to shortwave listening, this guide serves as your comprehensive ATS-20 radio manual to help you master its features. 1. Getting Started
Before diving into the frequencies, ensure your device is ready:
Charging: Most units use a Mini-USB or USB-C port. A red LED usually indicates charging, turning off or green when the 3.7V lithium battery is full.
Antenna: Screw the telescopic antenna into the BNC connector. For better HF (High Frequency) reception, consider using an external long-wire antenna. 2. Controls and Layout
Encoder Knob: This is your primary tool. Rotate it to change frequencies or navigate menus. Press it to confirm a selection.
Power Switch: Usually located on the side or back to toggle the unit on/off.
Volume: Adjust using the dedicated knob or through the digital interface (depending on your specific firmware version). 3. Selecting Modes and Bands
The ATS-20 covers a massive range including FM, AM, and SSB. Use the Bands menu to cycle through: FM: Standard broadcast radio (64–108MHz). MW (Medium Wave): Standard AM radio. SW (Shortwave): 1.7MHz to 30MHz. ats-20 radio manual
LSB/USB (Lower/Upper Sideband): Essential for listening to amateur radio operators on HF bands. 4. Tuning and Steps
To change your tuning speed, press the Step button (or encoder). Common increments include: 1kHz / 5kHz: Best for AM/MW scanning. 100kHz: Fast scrolling through FM. 10Hz / 100Hz: Critical for "clarifying" voices in SSB mode. 5. Advanced Features
Bandwidth (BW): You can adjust the filter width to cut out interference. Use narrower settings (e.g., 2.0kHz) for crowded SSB bands and wider settings (e.g., 6.0kHz) for high-quality AM.
BFO (Beat Frequency Oscillator): When in SSB mode, the BFO allows you to fine-tune the pitch of the voice to make it intelligible. Rotate the encoder until the "Donald Duck" sound turns into a clear human voice. 6. Menu Settings
By accessing the internal menu (usually a long press of the encoder), you can: Adjust Brightness: Save battery by dimming the OLED screen. Scan: Automatically search for the next strongest station. Mute: Quickly silence the audio. Troubleshooting Tips
No Sound on SW? Check your gain settings and ensure you are outside or away from electronic interference like LED bulbs or PC power supplies.
Firmware Updates: Many ATS-20 radios run on Arduino-based code. If your device feels "buggy," the enthusiast community often releases updated sketches that improve stability and add features.
Note: Always remember that radio propagation changes with the time of day. Lower frequencies (3–10MHz) usually work better at night, while higher frequencies (15–30MHz) are better during the day.
The ATS-20 (and the upgraded ATS-20+) is a portable full-band radio receiver based on the SI4732 chip. Official printed manuals are rarely included in the box, and users typically rely on community-shared PDFs or manuals for similar firmware (like the H-RADIO/ATS25 manual). Quick Start & Core Functions
Most ATS-20 units use a rotary encoder and a few tactile buttons for navigation. Because the ATS-20 radio manual is not in
Power: Usually a physical toggle switch or a long-press on the encoder.
Band Selection: Press the Band button or the rotary encoder to cycle through pre-configured bands (FM, AM, MW, SW, and SSB).
Tuning: Turn the rotary knob. Pressing the knob often changes the Frequency Step (1kHz, 5kHz, 10kHz).
SSB/BFO: For Single Side Band (LSB/USB), use the BFO control to fine-tune the signal for clarity.
Bandwidth: You can cycle through audio bandwidth filters (0.5, 1, 1.2, 2.2, 3, and 4kHz) to reduce noise. Key Specifications
Display: 0.96" OLED showing frequency, signal strength, and settings.
Battery: Internal 3.6V 800mAh lithium battery, rechargeable via USB.
Audio: Supports 3.5mm earphones or an 8-ohm/1.5W internal speaker.
Antenna: Uses an SMA interface; many users find the stock telescopic antenna is best for FM, while wire antennas help with shortwave (SW). Community & Troubleshooting
Because the firmware is often open-source (based on Arduino/ESP32), many users update their devices to gain new features like Bluetooth or better SDR capabilities. VHF/UHF (FM/Air): Use the telescopic whip plugged into
Missing Manuals: If your unit arrived without instructions, the ATS20/ATS25 Facebook Community is the primary hub for downloading the latest English PDF manuals and firmware updates.
Firmware Flashing: Updating the firmware (e.g., using ESPFlashDownloadTool) can fix bugs or add "Pro" features like AIR band reception. im looking for ATS-20 Diagram
ATS-20 Shortwave Radio: The Unofficial User Manual The ATS-20 (SI4732 based) receiver has become a favorite among hobbyists for its portability, affordability, and surprisingly wide frequency coverage. However, because these radios often arrive with minimal or poorly translated documentation, getting started can be a bit of a puzzle.
This is the most critical factor for performance.
The ATS-20 is open-source hardware. The community has written superior firmware that the original manual never mentions. The most famous is SI4735 Arduino firmware (ported to ATS-20).
Benefits of updating:
To update (you will need a USB-to-TTL adapter):
Warning: This voids any warranty and requires moderate technical skill.
Controls how "wide" the receiver listens. This is a DSP filter simulation.
Use the Band- and Band+ buttons.
Turn the volume knob after power-on. There is no digital volume display.
