Superseding the multi award winning HT series 1.0 was a challenging task considering its success with the fire & rescue services, major blue-chip petrochem organisations, as well as shipping companies worldwide. The HT Series 2.0 marine portables build upon this success. Utilising the latest intelligent Lithium-Ion battery technology, these marine portables give you the option of displaying a battery cycle count each and every time you power-on your radio. For your convenience it will even alert you to imminent battery life expiration. The commercial grade HT Series 2.0 portables, with their exceptionally loud audio, are also designed to withstand the every day rigours of life at sea, with superior MIL-STD 810/C/D/E/F construction and IP68 submersibility making them the most robust and durable marine portables on the market. As standard the HT644 is supplied with: - CNB750E - 7.4v, 1800mAh rechargeable Lithium-Ion battery pack
- Trickle charger
- CBH750 - Spring loaded belt clip
- High efficiency helical antenna
- User manual
TECHNICAL DATA | | Channels | INT, USA, CAN | | Channel Spacing | 12.5 kHz / 25 kHz | | Communication Method | Simplex / semi duplex | | Antenna Impedance | 50 ohm | | Antenna | Whip / stubby | | Battery Type | 1800 mAh Li-Ion battery pack | | Power Supply Voltage | 7.4V DC | | Current Drain (nominal) | TBA | | Duty Cycle (5/5/90) | TBA | | Microphone | Internal condenser microphone | | Operating Temperature | -20° to +55° | | Size (mm) | 59.5(W) x 130(H) x 37(D) W = 59.5 (62 including protrusions)
H = 130 (145 inc knobs)
D = 37mm (41 including battery protrusions) | | Weight | 277g with battery and aerial | |
| Power Output | HIGH – 5W, LOW - 1W | | Modulation | 8K0F3E/16K0F3E | | Oscillator Method | PLL | | Frequency Stability | < ±0.00025% (±2PPM) | | Maximum Deviation | ±2.5 kHz(Narrow)/ ±5 kHz(Wide) | | Audio Distortion | < 5% (1 kHz 60%) | | Spurious Emission | -68 [dBc] | | Hum & Noise | -40 [dB] | |
| Receiver Type | Double Super Heterodyne type | | Sensitivity | -0.25uV (12dB SINAD) | | Frequency Stability | ±0.00025%(±2PPM) | | Spurious Rejection | -60 dB | | Adjacent Channel Selectivity | -60 dB (Narrow) , -70 dB (Wide) | | Distortion | < 3% Typical | | Hum & Noise | -40 dB | | Audio Output | 1W | | Speaker Size | 38 mm |
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