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ENTEL HT-644 Marine Portable VHF

entel_logo HT 644

HT644 Marine Portable VHF radio
All Marine Channels
Submersible to IP68 (5 metres for 1 hour)

The HT644 portable is 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.

In compliance with worldwide license regulations the following version of HT644 are available:

• Version A : INT, USA, & Canadian modes
• Version B, C and D : INT mode only

Intelligent Li-Ion battery stores a charge up to three times longer than a NiCad battery!

As standard the HT644 is supplied with:

  • CNB750E - 7.4v, 2000mAh rechargeable Lithium-Ion battery pack
  • Drop-in charger
  • CBH750 - Spring loaded belt clip
  • High efficiency antenna
  • User manual
HT644 HT644

 

General Features

Entel is the first manufacturer to offer the superior IP68 specification, whereby we ourselves determine at what depth and for how long our equipment must remain waterproof. Not content with just the standard IP67 entry-level (1 metre for 30 minutes) Entel's IP68 HT series is certified as waterproof-submersible to an unprecedented depth of 5 metres for 60 minutes. Aware that the smallest tolerances of case size and material variation alone could compromise your radio's waterproof integrity, uniquely, each individual Entel portable is tested on a custom-built air pressure test-jig to ensure it meets the exacting high standards we have set for ourselves.

 

Meeting MIL-STD 810C/D/E/F commercial grade construction for tough, enduring performance, the Entel's HT and HX series 2.0 portables conform to stringent standards, enabling them to withstand the everyday rigours of shock, vibration and the corrosive effects of dust and moisture, ensuring many years of trouble free use in the most hostile environments.

 

All Entel portables come with the latest intelligent Lithium-Ion battery technology as standard. Whichever model you choose, these batteries will count the number of completed charge cycles, which on LCD variants, if dealer enabled, can be displayed when you power-on your radio. For your convenience it will even alert you to imminent battery life expiration. Another advantage of Lithium-Ion battery technology is the way it maximizes duty cycles, while the elimination of memory effect means there is no need to fully discharge the cells before recharging. Therefore you are assured a full duty cycle each and every time you take your radio from its charger.
The HTx44 and HTx49 models are supplied preprogrammed with all INT, USA and CAN channels.
A completely redesigned accessory connector, when secured to the portable, is designed to withstand any amount of punishment from dropping to careless misuse. Furthermore, the securing bolt incorporates a shearing point to protect the connector.

 

LCD display variants offer more information and versatility. For example, the entry level with LCD will display channel names, battery charge count, receive signal strength indicator etc.
The 7-key keypad gives you direct access to functions such as channel scanning, weather channels and channel 16.
Allows you to easily configure another radio to match your system.
When you do eventually use almost all the charge in your battery your radio will conveniently let you know it is time to change or recharge your battery.
When you attach a VOX enabled audio accessory you can operate totally hands free. All you need to do is talk and your Entel radio will automatically transmit for you.

Accessories

Optionally the following accessories are available:

CNB750E CNB750E – Lithium-Ion battery pack for the HT series hand portable radio. The CNB750E is an 2000mAh Lithium-ion lightweight battery pack for the HT series of hand portable radios. The Lithium-ion technology gives the radio a long operating time and the batteries will not suffer from the ‘memory effect’ that can be experienced on radios using alternative battery chemistries.
CSAHT CSAHT – Single-unit rapid charger for the HT series hand portable. This intelligent rapid mains charger ensures that the battery only receives the correct amount of charge. Charge status is indicated via a multi-coloured LED so you will know whether the battery is fully charged before use. Charger operates between 110-230V. Due to the high capacity of the HT Li-Ion battery pack, charge time is around 2.5 hours. The charger can be either desk or wall mounted.
CSBHT CSBHT - Six-unit multi rapid charger for the HT series hand portable radio. This six-unit intelligent rapid mains charger ensures that the batteries only receive the correct amount of charge. Charge status is indicated on each pod via a multi-coloured LED so you will know whether the battery is fully charged before use. Charger operates between 110-230V. Due to the high capacity of the HT Li-Ion battery pack, charge time is around 2.5 hours.
CCA230(HT) CCA230 - Single-unit regular charger for the HT series hand portable radio. Single-unit 230V mains regular charger for the HT series hand portable radio. Due to the high capacity of the HT Li-Ion battery pack, charge time is around 3.5 hours. The charger can be either desk or wall mounted.
CCA110 CCA110 – Single–unit regular charger for the HT series hand portable radio. Single unit 110V mains regular charger for the HT series hand portable radio. Due to the high capacity of the HT Li–Ion battery pack, charge time is around 2-6 hours. The charger can be either desk or wall mounted.
CCA12(HT) CCA12 - 12V DC regular charger for the HT series hand portable. A charger pod and cigar lighter lead for regular charging of the HT series batteries from a 12V DC source. Due to the high capacity of the HT Li-Ion battery pack, charge time is around 3.5 hours. The charger can be either desk or wall mounted.
CWCHT-12 CWCHT-12 - Cigar lighter lead for the HT series hand portable. A spare cigar lighter lead for the CCA trickle charger pod.
CWC750 CWC750 - Spare 3-pin mains adaptor, 230v
CBEHT CBEHT - Dummy battery with regulator for 12v operation. Enables the radio to be powered from a vehicle/motorcycle battery etc
CMP1 750 CMP1/750 - Pocket size lapel speaker microphone for the HT series hand portable radio. The CMP1/750 is attached with a revolving clip and allows the radio user to carry the radio on their belt and have the facility to both make and receive calls without removing their radio. This keeps the radio safe and ensures that calls are not missed, especially in noisy environments. The CMP1/750 has a socket (3.5mm mono) to allow an optional earpiece (EHP9) for discreet reception of calls. This accessory is designed for light to medium duty applications, so to ensure maximum life span it should be personally allocated to users.
CMP750 CMP750 - A submersible, very rugged, heavy duty lapel speaker microphone for the HT series hand portable radio. The CMP750 is attached with a revolving clip and allows the radio user to carry the radio on their belt and have the facility to both make and receive calls without removing their radio. This keeps the radio safe and ensures that calls are not missed, especially in noisy environments. The CMP750 has a socket (3.5mm mono) to allow an optional earpiece (EHP9) for discreet reception of calls. Note: When the earpiece is attached the speaker microphone is no longer submersible, until the earpiece is removed and the waterproof cover is replaced and tightened.
EA12 750 EA12/750 – ‘D’ shaped earpiece and tie clip microphone for the HT series hand portable radio. A ‘D’ shaped, soft rubber-feel earpiece which fits over your ear. This is connected to a combined tie clip microphone and press to talk button via a curly cable. A rotating strain relief clip can attach to your collar to prevent the earpiece being dislodged if the cable were pulled. The EA12/750 allows the radio user to carry the radio on their belt and have the facility to both make and receive calls without removing their radio. This keeps the radio safe and ensures that calls are not missed, especially in noisy environments. This accessory is designed for light to medium duty applications, so to ensure maximum life span it should be personally allocated to users.
EA15 750 EA15/750 – Acoustic tube earpiece and tie clip microphone for the HT series hand portable radio. A clear acoustic tube earpiece which fits in your ear using the small or large soft pink ear plugs supplied. This is connected to a combined tie clip microphone and press to talk button (PTT). The EA15/750 allows the radio user to carry the radio on their belt and have the facility to both make and receive calls without removing their radio. This keeps the radio safe and ensures that calls are not missed, especially in noisy environments. This accessory is particularly suited to covert, security applications. This accessory is designed for light to medium duty applications, so to ensure maximum life span it should be personally allocated to users.
EA19 750 EA19/750 – ‘D’ shaped earpiece with boom microphone for the HT series hand portable radio. A ‘D’ shaped, soft rubber-feel earpiece which fits over your ear. The earpiece is combined with a lightweight short profile boom microphone. There is an in-line press to talk button (PTT) with clip. The EA19/750 allows the radio user to carry the radio on their belt and have the facility to both make and receive calls without removing their radio. This keeps the radio safe and ensures that calls are not missed, especially in noisy environments. This accessory is designed for light to medium duty applications, so to ensure maximum life span it should be personally allocated to users.
EPT40 750 EPT40/750 - Bone conductive earpiece microphone for the HT series hand portable radio. The combined microphone/earpiece allows discreet communication with no visible microphone. The earpiece connects via a quality in line connector to a large rugged waterproof press to talk (PTT) button that can clip on to a belt or other suitable position using the rugged revolving clip. The press to talk switch is easy to use, has a positive feel and can be used by a gloved hand or under clothing. As with all bone conductive accessories, we do not recommend using voice operated transmit (VOX).
 CXE19 CXE19 Bone Conductive Headset CXE19 uses advanced bone conduction technology for both transmit and receive making this headset highly suitable for stealth applications. The benefit of bone conduction technology allows the user's ears to remain uncovered so they can be fully aware of their surroundings whilst wearing the headset. Lightweight and waterproof, CXE19 is suitable for a variety of applications, such as defence, security, fire and rescue. Salient features of the product are:
  • Ears free, maintains awareness
  • Less susceptible to background noise
  • Whisper speech capabilities under stealth conditions
  • Usable with most helmets, BAs, and balaclavas
  • Waterproof
 CXR5 750 CXR5/750 - Bone conductive skull microphone with in-line PTT for the HT series hand portable radio. A high quality rugged bone conductive compact helmet-com unit for professionals working in hazardous conditions. It has a dirt protected microphone and a single speaker and easily mounts into most helmet types and provides clear and hands-free communication. The headset attaches via a quality in-line connector to a large rugged waterproof press to talk switch that can clip on to a belt or other suitable position using the rugged revolving clip. The press to talk switch is easy to use, has a positive feel and can be used by a gloved hand or under clothing. As with all bone conductive accessories, we do not recommend using voice operated transmit (VOX).
CXR16 750 CXR16/750 – ‘D’ Shaped earpiece, throat microphone with large in-line PTT for the HT series hand portable radio. A high quality throat microphone with a comfortable soft-feel adjustable neck band. A rugged ‘D’ shaped earpiece accompanies the throat microphone and connects via a quality in-line connector to a large rugged waterproof press to talk switch that can clip on to a belt or other suitable position using the rugged revolving clip. The large sized press to talk (PTT) switch is easy to use, has a positive feel and can be used by a gloved hand or under clothing.
CHP1 750 CHP1/750 - Lightweight single earpiece headset with in-line PTT and VOX for the HT series hand portable radio. A ‘breeze’ style single earpiece wire-framed headset with boom microphone and wind cover. The headset has an in-line press to talk (PTT) button or the headset can be used with automatic voice activated transmit (when activated on the radio). The CHP1/750 allows the radio user to carry the radio on their belt and have the facility to both make and receive calls without removing their radio. This keeps the radio safe and ensures that calls are not missed, especially in noisy environments. This accessory is designed for light to medium duty applications, so to ensure maximum life span it should be personally allocated to users.
CHP750HS CHP750HS - Single earpiece ear defender (hard hat use only) with VOX for the HT series hand portable radio. A heavy duty single ear-cup earpiece with high quality noise-cancelling boom microphone and designed to connect to any safety hard hat via the supplied universal adapter. The headset provides both voice operated transmit (VOX) and a large easy-to-use press to talk button with spring-loaded clip, allowing the radio to be operated using a gloved hand or under clothing. We do stock a small range of common hard hat adapters which can be supplied in place of the universal adapter (please specify at time of ordering).
CHP750HD CHP750HD - Double ear-cup ear defender (hard hat use only) with VOX for the HT series hand portable radio. A heavy duty ear defender headset with high quality noise-cancelling boom microphone designed to connect to any safety hard hat via the supplied universal adapter. The headset provides both voice operated transmit and a large easy-to-use press to talk button with spring loaded clip, allowing the radio to be operated using a gloved hand or under clothing. We do stock a small range of common hard hat adapters which can be supplied in place of the universal adapter (please specify at time of ordering).
CHP750D CHP750D - Double ear-cup ear defender with comfort headband and VOX for the HT series hand portable radio. A heavy duty ear defender headset with high quality noise-cancelling boom microphone and comfort headband. The headset provides both voice-activated transmit and a large easy-to-use press to talk (PTT) button with spring-loaded clip, allowing the radio to be operated using a gloved hand or under clothing.
EHP750 EHP750 – D’ shaped covert style earpiece for the HT series hand portable radio. A ‘D’ shaped soft rubber-feel earpiece which fits over your ear. The earpiece is designed to connect into the HT series radio, via the locking accessory connector. This accessory is designed for light to medium duty applications, so to ensure maximum life span it should be personally allocated to users.
EHP9 EHP9 - 'D' shaped covert style earpiece for the HT series hand portable radio. A ‘D’ shaped soft rubber-feel earpiece which fits over your ear. The earpiece is designed to connect into the CMP750 or CMP1/750 lapel speaker microphones. This accessory is designed for light to medium duty applications, so to ensure maximum life span it should be personally allocated to users.
CFC750 CFC750 – Soft leather case with carry strap for the HT series hand portable radio. A soft lightweight carry case with belt-clip available in black. The case comes with a wrist lanyard offering the choice of carrying methods and gives the radio both cosmetic and some impact protection.
CLC753 CLC753 – Heavy duty transparent case and strap for the HT series hand portable radio. A clear heavy duty carry case with belt loop and strap. This will give the radio cosmetic and impact protection if dropped or knocked.
CLC753 with clear flap CLC753 – Heavy duty transparent case and strap for the HT series hand portable radio. A clear heavy duty carry case with belt loop and strap. This will give the radio cosmetic and impact protection if dropped or knocked (with transparent flap).
CBH750 CBH750 - Spare spring loaded belt clip
CXW750 CXW750 - Antenna adaptor for external aerial connection
  CAT40 – HT Series VHF marine standard antenna
CSM750 – Service manual (Only available to Authorised Dealers)
CPROGHT – Programming software & lead (Only available to Authorised Dealers)

Tehnical Specification

 

General

 

Frequency Range 156 - 163.275MHz (HT644)
Channels INT, USA, CAN
Channel Spacing 25 kHz
Communication Method Simplex / semi duplex
Antenna Impedance 50 ohm
Antenna Helical
Battery Type 2000 mAh Li-Ion battery pack
Power Supply Voltage 7.4V DC
Microphone Internal condenser microphone
Operating Temperature -20° to +55°
Weight 277g with battery and aerial
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)

 

Transmitter
Power Output HIGH - 5W, LOW - 1W
Modulation 16K0F3E
Frequency Stability < ± 0.0002% (2PPM)
Maximum Deviation ± 5 kHz
Audio Distortion < 5% (1kHz 60%)
Spurious Emission -68 [dBc]
Hum & Noise -40 [dB]

 

Receiver
Receiver Type Double Super Heterodyne type
Sensitivity < -0.25uV (12dB SINAD)
Frequency Stability  ± 0.0002% (2PPM)
Spurious Rejection -60 dB
Adjacent Channel Selectivity -70 dB
Distortion < 3% Typical
Hum & Noise -40 dB
Audio Output 1W
Speaker Size 38 mm
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