Notices

Buzzing Radio

Closed Thread

Old 11-12-2004, 02:11 PM
  #1  
Senior MemberCaptains Club Member
Thread Starter
 
Join Date: Feb 2004
Location: Bayville, NJ
Posts: 251
Default Buzzing Radio

I just installed a new Icom radio in my boat. It works and sounds perfect when the engine is not running. However, when the engine is running, it has a high pitched fuzzy noise (never happened with my old radio). When I ask for a radio check with the engine off, people come back and tell me I am loud and clear. When I ask for a radio check with the engine running they tell me it is not that clear. Does anyone have any ideas what can be causing the fuzzy buzzing noise when the engine is running? Thank you for any help.
seaox23 is offline  
Old 11-12-2004, 04:49 PM
  #2  
MemberCaptains Club Member
 
Join Date: Mar 2004
Location: Poorman\'s Canyon
Posts: 80
Default RE: Buzzing Radio

Sounds like you need a noise filter. The alternator is causing some noise as its charging Look at something like a Newmar PC-10 or 25 depending on your radios amp draw. They cost about $50-75 and you install them right at the problem.
Noobie is offline  
Old 11-12-2004, 09:02 PM
  #3  
Senior MemberCaptains Club Member
 
Join Date: Aug 2004
Location: Louisiana
Posts: 1,513
Default RE: Buzzing Radio

Where is your Icom hooked up to for power?
swamppro is offline  
Old 11-16-2004, 05:04 PM
  #4  
Senior MemberCaptains Club Member
 
Join Date: Feb 2002
Location: North Charleston, SC USA
Posts: 22,073
Default RE: Buzzing Radio

Noobie is correct, the best place to stop interference is at the source.

Does the noise speed up when the engine does? Did you also replace the spark plugs? Are they resistor plugs?
If the new radio is connected to the same wires and antenna as the old, check that all connections are tight and free of corrosion, particularly the ground connections.
Try an alternator filter as above.
Try noise filters from Radio Shack or an auto radio shop.
Contact Icom for suggestions, they have probably seen this before.
rwidman is offline  
Old 11-16-2004, 06:35 PM
  #5  
Senior MemberCaptains Club Member
 
Join Date: May 2003
Location: New Orleans, LA
Posts: 170
Default RE: Buzzing Radio

You have a ground loop. THey make a device called a ground loop isolator. Any car audio shop should carry one.
geaux77 is offline  
Old 11-16-2004, 06:38 PM
  #6  
Senior MemberCaptains Club Member
 
Join Date: Apr 2004
Location: mid/lower Chesapeake
Posts: 870
Default RE: Buzzing Radio

If you can get your hands on another VHF antenna,temporarily hook it to the VHF,routing the antenna cable differently from your existing one. If you loose the noise or it's less , the noise is coming in through your antenna or antenna cable. If you still have the noise,it's coming in through the 12 volt supply. At least that way you'll know have an idea where the problem lies.
Boomerang is offline  
Old 11-17-2004, 02:50 PM
  #7  
Senior MemberCaptains Club Member
 
Join Date: Feb 2002
Location: North Charleston, SC USA
Posts: 22,073
Default RE: Buzzing Radio

Boomerang - 11/16/2004 5:38 PM

If you can get your hands on another VHF antenna,temporarily hook it to the VHF,routing the antenna cable differently from your existing one. If you loose the noise or it's less , the noise is coming in through your antenna or antenna cable. If you still have the noise,it's coming in through the 12 volt supply. At least that way you'll know have an idea where the problem lies.
You can make the same test by just disconnecting your existing antenna. Just don't try to transmit, it could damage the radio.
rwidman is offline  

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are Off


Thread Tools
Search this Thread
 
  • Ask a Question
    Get answers from community experts
Question Title:
Description:
Your question will be posted in: