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Comar AS300 AIS Antenna Splitter - Transmit and Receive

Comar AS300 AIS Antenna Splitter - Transmit and Receive

Regular price £444.00 GBP
Regular price Sale price £444.00 GBP
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Comar AS300 AIS Antenna Splitter

Transmit & Receive | VHF / AIS / FM Radio

The Comar AS300 is a high-performance antenna splitter designed to allow a single VHF antenna to be shared between a Marine VHF Radiotelephone and an AIS Class B Transponder or AIS Receiver. This eliminates the need for a secondary antenna, saving both space and installation costs while maintaining signal integrity.

SAFETY FIRST: Engineered with a failsafe design, the VHF radio always maintains priority and remains connected to the antenna even if the splitter loses power.

Key Features

  • VHF Priority: Automatic routing gives priority to VHF voice transmissions.
  • Triple Output: Supports VHF Radio, AIS, and FM Broadcast Radio.
  • LED Status: Visual indicators for Power, VHF TX, AIS TX, and Antenna Fault.
  • Robust Housing: Rugged, marinised aluminium construction.

Technical Specs

Power Supply: 12V DC
Current Draw: ~135mA
Max VHF Power: 25 Watts
VHF/Antenna: SO-239 (UHF Female)
AIS Connector: BNC Female
FM Connector: RCA Phono

Compatibility / Fitment Guide

System Type Compatibility Notes
AIS Equipment Class B Transponders & Receivers Supports both Transmit and Receive
VHF Radios Standard Marine VHF (Fixed Mount) Up to 25W Max Output
Entertainment AM/FM Broadcast Radio Tuners 75 Ohm RCA connection

OEM Cross Reference

Comar Part Number: AS300
Internal SKU: 001-1016
Legacy Model: AST300

Questions & Answers

Is this a genuine original part?

Yes, this is a genuine Comar Systems AS300 AIS Antenna Splitter, manufactured in the United Kingdom.

How do I know if it is compatible?

If you are using a standard Marine VHF radio and an AIS Class B transponder (like the Comar T200B) and wish to use one antenna, this is the correct unit. It also works with Class A transponders for receiving purposes.

What happens if the splitter loses power?

The unit features a failsafe bypass. In the event of a power failure, the VHF radio remains physically connected to the antenna, ensuring your emergency communication is never compromised.

Note: Professional installation is recommended. For technical assistance, please contact the 4boats.co.uk support team.

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