Entel HT644

The first time you use the British manufacturer ENTEL HT644 portable station, you will be impressed by its exceptional quality. The HT644 was designed specifically for those who need an uncompromising marine portable device.
From a rugged ergonomic design that fits comfortably in the hand to an extremely powerful speaker, the HT644 easily outperforms the competition.
The HT644 portable station is built to the ultra-rigorous durability standards of MIL-STD 810C/D/E/ F to ensure reliable operation, and can be completely submersible according to the IP68 standard (at a depth of 2 meters for 4 hours). Possibility to program own channels in the 159-162MHz range.
ENTEL HT644 will exceed the expectations of even the most demanding user.

Environmental protection to IP68 (2 Meters for 4 hours)
The practical HT644 Series 2.0 portable enjoys an IP68 (2 Meters for 4 hours) rated construction, which means that they are dust protected and fully Submersible.

MILSTD 810C/D/E/F
Meeting MIL-STD 810C/D/E/F and providing commercial grade construction for tough, enduring performance. Entel's HT644 Series 2.0 portable conforms to stringent standards, enabling it to withstand the everyday rigors of shock, vibration and the corrosive effects of dust and moisture, ensuring many years of trouble free use.

2000mAh Li-Ion battery >
The HT644 Series 2.0 portable is supplied with the latest intelligent Lithium-Ion battery technology as standard. One key advantage of Lithium-Ion battery technology is the way it eliminates the 'memory effect' meaning there is no need to fully discharge your battery before recharging. Therefore you are assured a full charge each and every time you take your Entel battery from its charger.

Robust accessory socket
The socket has been specifically designed so that when an accessory is secured to the portable, the connection can withstand any amount of punishment; from dropping to careless misuse. Furthermore, the securing bolt incorporates a shearing point to protect the connector.

Channels
The HT644 portable provides all INT, USA & CAN Marine channels.

Keylock
To avoid accidental operation your radio keys & controls can be locked by the user or, if set, automatically by the radio.

VOX hands free (with audio accessory)
When using an Entel VOX enabled audio accessory, your HT644 portable can operate totally hands free. All you need to do is talk and the HT644 portable will automatically transmit for you.

Scan
The HT644 Series portable has the facility to scan for an active channel. When the channel is found, the radio will automatically select the channel for you.

Specifications General
Frequency Range 156 - 163.275MHz
Channels All INT, USA & CAN Marine Channels
Channel Spacing 25 kHz
Communication Method Simplex / semi duplex
Antenna Impedance 50 ohm
Antenna Whip / stubby
Battery Type 2000 mAh Li-Ion battery pack
Power Supply Voltage 7.4V DC
Current Drain (nominal) 40mA
Duty Cycle (5/5/90) 12.5 hours
Microphone Internal condenser microphone
Operating Temperature -20° to +55°C
Construction MIL-STD 810C/D/E/F
IP Rating IP68 (2 meters depth for 4 hours)
Size (mm) 59.5(W) x 130(H) x 37(D)
Weight 277g with battery and aerial
Transmitter
Power Output High – 5W / Low - 1W
Modulation 8K0G3E/16K0G3E
Oscillator Method PLL
Frequency Stability 2.5PPM
Maximum Deviation ±5 kHz
Audio Distortion < 5% (1 kHz 60%)
Spurious Emission -68 [dBc]
Hum & Noise -40 [dB]
Receiver
Receiver Type Double Super Heterodyne type
Sensitivity -0.25uV (12dB SINAD)
Frequency Stability 2.5PPM
Spurious Rejection -60 dB
Adjacent Channel Selectivity -60 dB (Narrow) , -70 dB (Wide)
Distortion < 5% (1 kHz 60%)
Hum & Noise -40 dB
Audio Output 1W