When it comes
to purchasing a marine MF/HF (SSB) transceiver the choice is a little limited.
The reason for this is that marine equipment needs to meet the relevant
type approval standards and marine radios (both VHF and HF) have to meet the
Here in Europe marine radios being sold today must
be complaint to the European Radio equipment and Telecommunications Terminal
Due to some strange and bizarre
EU regulations there currently no manufacturer of marine MF/HF (SSB) equipment
that wants to produce a Class 'E' MF/HF (SSB) transceiver for the non-solas
leisure market that meets the
directive. It is all part of the
'New Approach' directive - basically produce a
standard and see if manufacturers can meet it!
Transceivers that meet
the R&TTE directive are available for SOLAS vessels but only operating on
24 volts and are available from companies like
, they come with a
very large price tag.
The components required for a MF/HF (SSB) installation are:-
- Marine MF/HF (SSB) Transceiver 2 MHz to 27.5 MHz
- Marine Ariel Tuner Unit (ATU) 2MHz to 27.5 MHz
- Coax cable (RG-213) between transceiver at ATU
- Control cable between transceiver at ATU
- HF Antenna (7 meter whip or backstay)
- Mounting bracket for HF antenna
- High voltage GTO15 type cable between ATU and HF antenna
- HF DSC watch antenna
Note: The antenna starts at the ATU and therefore the ATU
should be mounted at the base of the antenna and kept well clear of other
electrical equipment and cables.
Icom produce the M801E and M802 marine MF/HF (SSB)
The Icom M801E met the old
directive, it does not meet the latest directive
and is no longer available.
The M802 never met the
directive but is the only 12 volts marine MF/HF
The Icom M801/2 transceivers both deploy Digital
Signal Processor technology offers a high level of communications performance
while at sea.
The ICOM M801/2 can be used
- Distress and Safety communications with coastguard
- Talking to other yachtsmen
- Monitoring for DSC calls
- Sending and receiving email via SSB - requires
pactor modem and PC.
- Receiving worldwide short-wave radio broadcasts
- Receiving global weather broadcasts
- Fax, RTTY, Navtex - requires PC and software
- Receive 500 kHz to 30000 kHz
- Transmits on all MF/HF marine bands
- Operation mode USB-J3E, AM-H3E, CW-J2A & FSK-F1B.
- 1195 channels
- 125 watts power PEP output
- Supply 12 or 24 volts options
- Digital Signal Processing (DSP) to eliminate noise and
- Built in DSC meeting GMDSS requirements class E DSC for
non-SOLAS regulated vessels.
- Auxiliary socket for connection to SCS
- ICOM AT141 antenna tuning unit (ATU)
ICOM M801 v
Although the M801E and M802 look the same that is where the
The M801 is housed in a more robust housing with
heavy duty connectors, ideal for the marine environment.
The M801 as an
internal DC to DC converter which allows for better voltage stability and
reduces the possibility of Galvanic corrosion .
By using the latest DSP
technology, the M801E has better receiver performance.
The M801E is a fully
compliant class 'E' DSC unit offering a full range of DSC features compared
with the M802 limited range of DSC functions.