Deliberately picking up on this old thread as I have been planning to buy one of these units.
I am wondering what happens to the VHF signal if the Comar unit fails or is depowered. Does it fallback to a direct connection?
Now I am also concerned about this S/N ratio issue.
Has anybody any further news?
Results 11 to 20 of 28
20-02-12, 21:37 #11
20-02-12, 22:25 #12Registered User
- Join Date
- Nov 2004
Don't know about the multi - we have the normal dual channel comar engine on a dedicated antenna and very happy with it ... never been happy with splitters of any sort .. hopefully it's an unjustified prejudice!
20-02-12, 22:42 #13
It's a attractive solution to use a splitter in the effort to install but one that should be avoided if possible. As usual with these solutions it'll work under normal circumstances, but when the sh*t hits the fan these systems will always find a reason to fail.
20-02-12, 22:48 #14
I have the same unit but with a dedicated aerial. I have found the Comar support excellent and a faulty unit was replaced without any quibblePeter
20-02-12, 23:47 #15
I posted the original message with the problem. Since then Comar replaced the unit and I had the same problems with the new one. I had the VHF antenna and radio checked out and all are ok, so I never got to the bottom of the problem. I now use the Comar with a dedicated pushpit antenna and it works fine but that rather defeats the point of buying that particular model with the antenna sharing.
20-02-12, 23:50 #16
20-02-12, 23:56 #17
21-02-12, 01:26 #18
The AIS specs call for a dedicated antenna. All so called splitter solutions are NOT to be used. Why spend top $ on an AIS, save a few bucks on a separate antenna and compromise both AIS AND VHF.
If cost were the issue I'd rather use a dedicated coat hanger for the AIS than sharing an antenna.
21-02-12, 09:26 #19
I have a COMAR too and it saw us safely from Turkey to India.
The one piece of advice I was told when researching this subject was NEVER SPLIT THE VHF AERIAL, no matter what gizmos you are told will do the job.
With this in mind I ran two independent aerials for each AIS and VHF down my rigging and through the deck. I used self-amalgamating tape around the cables to the rigging and whilst it wasn't the prettiest solution I have never had a problem (actually, you barely notice it). Since we were about to embark on a long journey through busy waters it was a case of opting for a practical solution, and this was it.
Whilst you already know that separate aerials is ideal but not practical my advice is run separate aerials no matter how difficult or ugly they are to install.
Sorry if this isn't solid technical advice, it's just my personal experience.
21-02-12, 09:35 #20