First off "loud buzzes" in your own transmissions are usually caused by a bad inverter
/ power supply....or ground loops...or bad ground wire connections...
But, how are you hearing them??
Or, is it just that others are reporting them??
Have you listened to your own radio, using another to receive your own signal??
And/or have you used SeaTow's Automated Radio Check System??
If you're referring to the SH GX2200, I believe it has a GPS built-in to it, yes???
Welcome to StandardHorizon.com
So, I assume you have another "GPS" on-board, or perhaps a "chartplotter" / "MFD" (Multi Function Display)?? That might be the cause here...
But, with a loud buzz in your transmit audio, I'm thinking this could also be caused by interference
from a depth sounder
(incorporated into a chartplotter
/ MFD ???)
And, usually this type of interference
can be traced to bad wiring/connections, and/or a ground loop somewhere....especially if you've not connected a ground wire properly, from a NMEA
cable, coaxial cable, etc...
(assume you have the GX2200 38400baud AIS
output connected to your "GPS"???)
Originally Posted by Huntersailor
I just discovered that while radioing with my GPS (Garmin) turned on the transmission has a loud buzz in it. The radio was just installed this year and normally I transmit to call our marina launch after the GPS is off. The transmission is clean on multiple channels with GPS off.
Any ideas on how to eliminate this issue? The choke on the DC supply is in place. The radio is in the cockpit
and the GPS unit is in the cabin
My first thoughts for issues like this, with a new radio and new installation
are typically bad wiring
connections (including coaxial cable connections)...
Then, suspect wiring
/ connections to/from the plotter/MFD ('GPS")...
But, you haven't given us much info on what/how this Garmin
GPS is, nor how it is wired/connected/networked (???)
So, it's tough to say anything specific...
Sorry, to be so brief this morning, but I've got an apt to get to.
If you can give us some more info, I'm sure we can help...