SailNet Community - Reply to Topic

   Search Sailnet:

 forums  store  


Quick Menu
Forums           
Articles          
Galleries        
Boat Reviews  
Classifieds     
Search SailNet 
Boat Search (new)

Shop the
SailNet Store
Anchor Locker
Boatbuilding & Repair
Charts
Clothing
Electrical
Electronics
Engine
Hatches and Portlights
Interior And Galley
Maintenance
Marine Electronics
Navigation
Other Items
Plumbing and Pumps
Rigging
Safety
Sailing Hardware
Trailer & Watersports
Clearance Items

Advertise Here






Go Back   SailNet Community > On Board > Gear & Maintenance > vhf / gps interference
 Not a Member? 


Thread: vhf / gps interference Reply to Thread
Title:
  

By choosing to post the reply below you agree to the rules you agreed to when joining Sailnet.
Click Here to view those rules.

Message:
Trackback:
Send Trackbacks to (Separate multiple URLs with spaces) :
Post Icons
You may choose an icon for your message from the following list:
 

Register Now

In order to be able to post messages on the SailNet Community forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
Please note: After entering 3 characters a list of Usernames already in use will appear and the list will disappear once a valid Username is entered.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Click here to view the posting rules you are bound to when clicking the
'Submit Reply' button below


Additional Options
Miscellaneous Options

Click here to view the posting rules you are bound to when clicking the
'Submit Reply' button below


Topic Review (Newest First)
07-10-2007 12:53 AM
chuckg5 I know , Jim
the aluminum would just be a test shield for r/f
absolutly no good near buzz bars
07-10-2007 12:28 AM
SEMIJim
Quote:
Originally Posted by chuckg5
I do have numerous loops in the gps cable
It's best to avoid loops in antenna cable, even if it's just a receiver cable, if you can. You certainly don't want a bunch of looped GPS antenna cable right near the VHF radio.

Quote:
Originally Posted by chuckg5
i'll try a move the coax an gps cables furthur apart , tommorow
That would be best. The shield on antenna cable is imperfect.

Quote:
Originally Posted by chuckg5
thinking of wrapping aluminum foil around the power inputs of both as
a test to see if that can eliminate the noise
My guess is all that'll accomplish is looking messy and create a fire hazard.

Quote:
Originally Posted by chuckg5
thank you for replies!
You're welcome

Jim
07-10-2007 12:21 AM
chuckg5 I do have numerous loops in the gps cable
i'll try a move the coax an gps cables furthur apart , tommorow
thinking of wrapping aluminum foil around the power inputs of both as
a test to see if that can eliminate the noise
thank you for replies!
07-10-2007 12:21 AM
sailingdog I would run the VHF coax antenna cable as far from the GPS cabling as possible and add ferrite cores to the cable. Both should help reduce any interference caused by the GPS.
07-09-2007 11:42 PM
SEMIJim
Quote:
Originally Posted by knotaloud
I remember reading somewhere that if your GPS antenna cable runs too close to the VHS coax, that could do it, or if your GPS antenna cable has a big loop or coil, it can act like a radio antenna and amplify radio interference.
Well... close. The GPS might emit some amount of "random" RF noise, across the spectrum, from its receiving antenna system. All radios, even pre-digital ones, do. (Tho the pre-digial ones weren't random. You could tell what station they were tuned to by what they were radiating.) Shouldn't be much, though. All a loop in the GPS' antenna line will do is perhaps radiate more noise in in the area of the loop.

Quote:
Originally Posted by knotaloud
And I would ground the coax
It'll already be grounded via the chassis of the radio--and possibly at the antenna end, as well. (Depends on the antenna type and mounting method.)

Jim
07-09-2007 11:34 PM
SEMIJim Just tighten-down the squelch on the VHF rig a bit. All electronics generate RF noise. All. You can pick up some ferrite donuts at certain electonics supply places or Ham Radio swap-and-shops, loop your radio and GPS power through those a few times and reduce somewhat any RF noise that's leaving/entering through the power leads. (That'll also somewhat reduce engine alternator noise in the radio.) That may help some. Other than that: Just make sure your grounding is good, and your coax in good shape and well-terminated at both ends. That's about all you can do.

Jim
07-09-2007 11:31 PM
knotaloud I remember reading somewhere that if your GPS antenna cable runs too close to the VHS coax, that could do it, or if your GPS antenna cable has a big loop or coil, it can act like a radio antenna and amplify radio interference. And I would ground the coax
07-09-2007 11:20 PM
chuckg5 Saildoggy
straight shot coax into vhf, nothing fancy
r u suggesting maybe more grounding of said coax, close to the box?
this is in recieving mode, I'm not even transmitting
07-09-2007 11:02 PM
sailingdog How do you have the antenna coax cable run for the VHF?

BTW, the FCC statement on the equipment probably says that it is allowed to give off some radio wave interference.
07-09-2007 10:53 PM
chuckg5
vhf / gps interference

just installed a Garmin 3206 in the nav station
already have a Icom 502
the minute I turn on the Garmin, channel 28 on the vhf comes on with static an stops the scan
i know they're right next to each other but the garmin shoulddn't be putting out radio waves.
does any one know what's up with this?
all power wires meet up in the same ground an positive bus bars
i cancelled out channel 28 on the scan but that doesn't help
thanks!

 
Posting Rules
You may post new threads
You may post replies
You may post attachments
You may edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On


All times are GMT -4. The time now is 11:27 PM.

Add to My Yahoo!         
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
SEO by vBSEO 3.6.1
(c) Marine.com LLC 2000-2012

The SailNet.com store is owned and operated by a company independent of the SailNet.com forum. You are now leaving the SailNet forum. Click OK to continue or Cancel to return to the SailNet forum.