SFE ST35 Two-Way Radio

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SFE ST35_PMR446 Two-way Radio from Diotron Communications

Description

The SFE ST35 Two-Way Radio is an ultra-compact, lightweight pocket-sized transceiver engineered for seamless, hassle-free communication. While it is widely used as a subscription- and license-free PMR446 radio for short-range applications like hospitality, retail, and outdoor hiking, it also features a versatile hybrid architecture. This allows it to be programmed across the broader commercial UHF band to connect directly with existing business fleets and repeaters. It replaces bulky traditional walkie-talkies with a sleek, internal-antenna design that slips easily into a pocket or clips securely onto a belt.

Features

Channel Capacity 60 channels
Selectable Power Output High power: 2 W
Low power: 0.5 W
FRS / PMR Option Available with FRS / PMR configuration options, depending on model and regional requirements.
Internal Antenna Features an integrated internal antenna for a compact, convenient design.
VOX Function Supports VOX voice-activated transmission for compatible hands-free communication.
Time-Out Timer (TOT) Helps prevent excessively long transmissions, reducing unnecessary channel occupation and battery consumption.
Channel Scan Scans programmed channels for active communications, allowing users to monitor radio traffic efficiently.
Squelch Tail Elimination Helps reduce unwanted end-of-transmission noise for clearer and more comfortable audio.
CTCSS / DCS Encode & Decode Supports CTCSS and DCS encoding and decoding for improved channel management and communication between configured radio groups.
Built-In Torch Integrated torch light positioned at the top of the radio provides convenient illumination when required.
Automatic Battery Save Automatic power-saving functionality helps reduce battery consumption and extend operating time between charges.
Low Battery Alert Provides an alert when battery power is running low, helping users recharge or replace the battery before operation is interrupted.
PC Programmable Supports PC programming for compatible channel and radio function configuration.
Compact & Lightweight Small and lightweight design makes the radio comfortable to carry and convenient for everyday use.

Specifications

General
Frequency Range VHF: 136–174 MHz
UHF: 400–470 MHz
Channel Capacity 60 channels
Operating Voltage 3.7 V DC
Channel Spacing 25 kHz (Wide) / 12.5 kHz (Narrow)
Antenna Impedance 50 Ω
Battery Capacity 1500 mAh Li-Ion battery
Battery Life (5-5-90 Duty Cycle) Approximately 15 hours
Operating Temperature -20°C to +60°C
Frequency Stability ±2.5 ppm
Dimensions (W × H × D) 90 × 47 × 26 mm (projections excluded)
Weight 108 g (antenna and battery included)
Transmitter — ETSI EN 300 086 Testing Standard
Bandwidth Wide Band: 25 kHz
Narrow Band: 12.5 kHz
RF Power Output (High/Low) 2 W / 0.5 W
Modulation Wide: 16K0F3E
Narrow: 11K0F3E
Spurious Emission ≥36 dB
Adjacent Channel Power Wide: ≥70 dB
Narrow: ≥60 dB
Hum & Noise Wide: ≥40 dB
Narrow: ≥36 dB
Audio Response Wide: +1 to -3 dB (0.3–3 kHz)
Narrow: +1 to -3 dB (0.3–2.25 kHz)
Modulation Limiting Wide: ±5.0 kHz
Narrow: ±2.5 kHz
Modulation Distortion Less than 5%
Frequency Stability ±5 ppm
Receiver — ETSI EN 300 086 Testing Standard
Bandwidth Wide Band: 25 kHz
Narrow Band: 12.5 kHz
Sensitivity (12 dB SINAD) Wide: ≤0.25 μV
Narrow: ≤0.35 μV
Adjacent Channel Selectivity Wide: ≥70 dB
Narrow: ≥60 dB
Intermodulation Wide: ≥65 dB
Narrow: ≥60 dB
Spurious Response Rejection ≥70 dB
Audio Response Wide: +1 to -3 dB (0.3–3 kHz)
Narrow: +1 to -3 dB (0.3–2.25 kHz)
Hum & Noise Wide: ≥45 dB
Narrow: ≥36 dB
Audio Distortion ≤5%
Audio Output 500 mW with less than 10% distortion

Brochure

ST35_PMR446_Brochure

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SFE ST35_PMR446 Two-way Radio from Diotron Communications