Amateur radio receiver ATS25 max-Decoder II - HARDUINO

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Amateur radio

receiver ATS25 max-Decoder II


  • built-in Bluetooth module
  • RF preamp
  • increased lithium battery capacity

2024 model of the popular amateur radio receiver of the ATS25 series on an ESP32 microcontroller with a 320 x 240 pixel color touch screen and a radio path on an SI4732A10 chip. Continuation of the development of the ATS25 max-Decoder model, which became a hit last year.


Video review of the ATS25 max-Decoder II receiver with H-RADIO 4.2 AIR firmware


Compact size 110x100x45 mm. Lightweight aluminum case of classic shape for radio-electronic equipment.

Color graphic screen 320 x 240 pixels with touch control and large encoder knob.

Protection of the antenna input from static electricity.



All necessary interfaces on the rear panel:
- BNC connector for receiving antenna;
- SMA Wi-Fi antenna connector;
- 3.5mm headphone jack;
- Type-C connector for charging and connecting to a PC.

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Built-in 4000mAh lithium battery.

The receiver is equipped with a loud speaker with high-quality sound and a headphone output.

The built-in high-frequency amplifier will help you hear even the weakest signals. It will also provide reliable reception of FM broadcast stations outside the city.

Switching the antenna input impedance will effectively tune any antenna for reception.

The receiver is equipped with HF band notch filters to reduce mirror channel interference.

Change the brightness or turn off the screen completely for even greater autonomy and less interference.

Thanks to the built-in Bluetooth module, you can now use wireless headphones or a speaker for even more convenient listening to the broadcast.

Automatic switching of antenna input.

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Frequency range:
132kHz - 30000kHz AM, SYNC, SSB, CW, DIGI;
64MHz - 108MHz FM with RDS function.

Digital communications decoder: FT8, FT4, PSK, RTTY.

Built-in RF preamplifier.

Switching the antenna input impedance.

Adjustable bandwidth from 500Hz to 6000Hz depending on modulation.

Measures the quality of the received signal in real time and automatically searches for broadcast stations based on the received data.

Frequency setting accuracy for SSB is up to 1Hz.

Receives RDS information about station name, current program, radio station type and local time. Regional RDS support.

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Learn more about H-RADIO firmware capabilities

Lists ranges according to standards and regional specifics. Division into broadcast and amateur radio bands.

Quick frequency entry. Two VFOs with fast switching.

Unlimited memory of stations with grouping by reception area. FM mode to quickly switch between stored FM stations for a selected location.

Channel mode for CB band.

Retro scale with grouping of ranges according to reception conditions. Current information about the passage of waves from the Internet.

Range scanner with bar graph display for quick detection of operating stations.

Wide range of customization options.

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Decoding Morse code for the Latin alphabet and Cyrillic alphabet. Speed calculation.

Decoding digital modes of communication:
- RTTY (45.45 / 50 / 75 baud);
- PSK (BPSK32 / BPSK63);
- FELD-HELL;
- FT4 and FT8.
Saving decoded data to a file and sending it to a PC.
Possibility of expanding the list of digital communication standards.

RF pre-amplifier for receiving weak signals and improving the quality of reception of broadcast stations.

Convenient signal tuning using the waterfall indicator.

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A complete set of everything you need to get started:
- ATS25 max-Decoder II receiver;
- telescopic antenna;
- Wi-Fi antenna;
- USB cable;
- stylus;
- anti-slip feet.

Packaged in a cardboard box with foam inserts to protect the receiver during transport.

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