Description
Updated for 2024, the Retevis HS4 10+ Meter Mobile CB Style Amateur Ham Radio now includes CTCSS/DCS tones and supports both Electret and Dyna style mics via its 4-pin microphone connector. With six operational modes (PA/AM/FM/USB/LSB/CW), versatile frequency bands, and long-range communication capability, this mobile SSB radio ensures clear and reliable operation. Features include a large LCD, noise reduction, dual watch function, SWR protection, and keypad lock for enhanced usability.
Features:
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Operational Modes: PA / AM / FM / USB / LSB / CW, with Morse code CW mode and 2.5mm key plug
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Frequency Bands: 6 channelized zones (A/B/C/D/E/F) for maximum coverage
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Large LCD Display: Shows complete frequencies and function operations
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Clear Sound Quality: Supports squelch and noise reduction functions
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CTCSS/DCS: 104 codes for secure communication
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SWR Protection: Protects radio from high SWR damage
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Dual Watch Function: Receives on two frequencies alternately
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Keypad Lock: Prevents accidental frequency or setting changes
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VFO Knob: Adjustable frequency rotation with optional step values
Specifications:
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Frequency Range: 28.000 MHz – 29.700 MHz
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Frequency Bands: A/B/C/D/E/F
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Channels: 60 programmable channels
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Frequency Control: Phase-Locked-Loop Synthesizer
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Frequency Step: 10Hz / 100Hz / 1KHz / 10KHz
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Frequency Tolerance: 0.005%
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Frequency Stability: 0.001%
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Temperature Range: -30℃ to +50℃
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Microphone: Plug-in dynamic with PTT / UP / DN / ASQ switch, coiled cord
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Input Voltage: DC 13.8V normal, 15.9V max, 11.7V min
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Transmit Current: AM full mod 6A, SSB 30W PEP output 9A
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Size: 28 x 25 x 6 cm
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Weight: 1.5 kg
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Antenna Connector: UHF, SO239
Transmitter:
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Power Output: AM/CW 1–12W, FM 1–40W, USB/LSB 1–35W (adjustable)
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Modulation: AM / FM
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Inter-modulation Distortion: SSB 3rd order > -25dB, 5th order > -35dB
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SSB Carrier Suppression: 55dB
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Unwanted Sideband: 50dB
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Frequency Response: AM/FM 450–2500 Hz
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Output Impedance: 50Ω, unbalanced
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Sensitivity: SSB 0.25μV (10dB S+N/N), AM 1.0μV, FM 1.0μV
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Selectivity: AM/FM 6dB@3KHz, 50dB@9KHz, SSB 6dB@2.1KHz, 60dB@3.3KHz
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Image Rejection: >65dB
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IF Frequency: AM/FM 10.695 MHz 1st IF, 455 kHz 2nd IF; SSB 10.695 MHz
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Adjacent Channel: 60dB AM/FM, 70dB SSB
Receiver:
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RF Gain Control: 45 dB adjustable
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Automatic Gain Control (AGC): <10 dB change for 10–100,000 μV input
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Squelch: Adjustable, threshold <0.5μV; Automatic Squelch for AM/FM 0.5μV
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ANL: Switchable
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Noise Blanker: RF type, effective on AM/FM/SSB
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Audio Output Power: 3W into 8Ω
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Frequency Response: 300–2800 Hz
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Built-in Speaker: 8Ω, round
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External Speaker: 8Ω (disables internal speaker when connected)
Programming Software & Manual:
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Owners Manual included
What’s in the Box:
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Retevis HS4 Mobile CB Style Amateur Ham Radio
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Plug-in Microphone
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Power Cable / Antenna Connector
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User Manual
