4Boats
Comar AS300 AIS Antenna Splitter - Transmit and Receive
Comar AS300 AIS Antenna Splitter - Transmit and Receive
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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.
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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