I think it is Shakesphere that makes an automatic switch for this
purpose. Look in the West marine cataloge.

Regards
Gary

On Thu, 24 Feb 2005 00:07:56 +0000, kailaniskipper
wrote:


I have a VHF installed in our cabin with only a remote speaker in
cockpit. Instead of replacing the unit with a newer VHF with remote mic
and/or station options, I would like to simply add another standard VHF
radio at the helm and share the antenna (located at the top of a 55'
mast).

Is there a standard convention available which will allow both radios
to share a common antenna without manual switching or other
intervention?