H-RADIO ATS25Max Si4732 Full Band DSP Receiver

Full Band DSP Receiver with Official ATS25Max Decoder

The H-RADIO 4.17 AIR Firmware ATS25Max-Decoder Si4732 receiver is designed for users who need stable, wide-coverage radio reception with advanced digital features. With official registered firmware, full-band DSP processing and multi-mode support, it is suitable for everyday listening, hobby monitoring and emergency information reception.

Housed in a durable aluminum alloy shell, this receiver covers FM, LW, MW, SW and SSB bands, supported by the Si4732 full-band DSP chipset. The 2.4-inch touch screen provides an intuitive interface for band selection, direct frequency input via digital keypad and quick access to HAM band channels. The built-in 3.7V / 4000mA lithium battery and Type‑C charging interface (up to 1.2A) support long listening sessions and convenient recharging. Audio output is delivered through a 3.5mm stereo jack, with an additional 3.5mm jack for FM antenna input and a BNC interface for external antennas, giving flexibility for both portable and fixed use.

The H-RADIO 4.17 AIR firmware integrates ATS25Max-Decoder functions such as CW, RTTY, FT4 and FT8 decoding, multiple audio spectrum displays and improved frequency accuracy. The firmware optimizes microcontroller memory to speed up the interface and refines frequency and spectrum display behavior across modes. It also adds Bluetooth support, encoder lock options and antenna configuration shortcuts via a quick access panel. Scan functions, DIGI decoding display, time acquisition via RDS and SSB SNR calculation have been refined to deliver more consistent operation and clearer signal evaluation. AM bandwidth is adjustable from 1-6 kHz and SSB bandwidth from 0.5-4.0 kHz, allowing you to tailor audio to signal conditions and listening preferences. The compact body measures approximately 120 x 115 x 48 mm (excluding protrusions), making it suitable for desktop, shack or portable field setups.

Why It's a Smart Choice

• Wide frequency coverage with DSP and SSB support for versatile listening across FM, LW, MW, SW and amateur bands.
• Official ATS25Max firmware with digital mode decoding (CW, RTTY, FT4, FT8) and refined interface behavior for more precise operation.
• Built-in 4000mA lithium battery, Type‑C charging and multiple antenna/audio interfaces for flexible portable or fixed use.

FAQ

Q: Which bands and modes does this receiver support?
A: It supports FM (64-108 MHz with RDS), LW (153-500 kHz), MW (520-1710 kHz), SW (1730-30000 kHz) and SSB, with DSP processing and adjustable AM/SSB bandwidth.

Q: Does it have a built-in battery and how is it charged?
A: Yes, it includes a built-in 3.7V / 4000mA lithium battery and uses a Type‑C interface for charging with up to 1.2A current.

Q: Can I connect external antennas and headphones?
A: The unit provides a BNC interface for external antennas, a 3.5mm jack for an FM antenna and a 3.5mm stereo audio output for headphones or speakers.

Q: What are the advantages of the ATS25Max-Decoder firmware?
A: The firmware adds CW, RTTY, FT4 and FT8 decoding, audio spectrum views, improved frequency accuracy, Bluetooth support, refined scan behavior and quick access controls for Bluetooth, encoder lock and antenna options.