Go Back   Cruiser Log World Cruising & Sailing Forums > Cruising Forums > The Bosun's Locker > Power & Electronics
Cruiser Wiki

Join Cruiser Log Today

Reply
 
Thread Tools Search this Thread Display Modes
 
Old 10-05-2008, 02:38 AM   #1
Lieutenant
 
Join Date: Aug 2008
Posts: 78
Default

Hello, I have seen some Brass grounding bars used for electronics grounding, ( mounted on the outside of the hull with studs into the bilge for connection points) as I understand it. Does anyone out there have one of these on thier vessel? I will have extensive electronics including SSB, AP, etc. Any opinions? Also, I have heard of grounding the mast to one of these for lightning protection? What do you all think? They seem quite spendy, How is the size determined?

Any response is appreciated, Thanks
__________________

__________________
For the truth is that I already know as much about my fate as I need to know. The day will come when I will die. So the only matter of consequence before me is what I will do with my alloted time. I can remain on shore, paralyzed with fear, or I can raise my sails and dip and soar in the breeze.

- RICHARD BODE
islandseeker is offline   Reply With Quote
Old 10-05-2008, 06:22 PM   #2
Lieutenant
 
Join Date: Jun 2008
Posts: 51
Default

My Boat came with a dynaplate - a scintered bronze plate which is supposed to offer a large area of (RF) ground. It has become fouled with marine growth which, I suspect, greatly reduces the surface area.

I am a bit concerned with what would happen were there to be a direct lightning strike, as it may not be able to dissapate the charge and heat and explode.

While I have never heard of such, knowledgeable people do not dismiss the possibility out of hand.

I have thought of removing it, but haven't.

I do not like holes in the hull.

Gordon West ( a ham radio "guru") says that a bonded brass thru hull is sufficient for RF round for a HF radio. I have grounded engine, tanks, run some thin brass sheeting inside the hull under the waterline for a capacitive coupled RF ground and get out well.
__________________

__________________
babylonlarry is offline   Reply With Quote
Old 10-05-2008, 07:27 PM   #3
Captain, Sailboat Reboot
 
Join Date: Nov 2007
Home Port: None
Vessel Name: Reboot
Posts: 110
Send a message via AIM to svReboot
Default

When I faced the same question for a new SSB transceiver I tried the following:

1. I ran a ground from the antenna tuner to one of the bolts on my keel. I did not run a ground between the antenna tuner and the transceiver (Kenwood TS-480 HX) as the shield of the coax is grounded to both the "case" of the antenna tuner and the transceiver and I did not want to provide multiple paths. I tuned the rig up and made a few contacts and got some signal reports. Then I dropped 100 feet of copper wire off the stern with one end attached to the antenna tuner ground. Repeated the contacts and got no difference in signal reports. I declared my keel just find as my counterpoise coupler.

2. With respect to a lightening strike I did not do anything to ground the mast. It is a keel stepped mast so I figure that the lightening with burn out whatever fiberglass sits between the keel and the bottom of the mast.
__________________
Roger
Current position http://www.winlink.org/dotnet/maps/Positio...?callsign=W2ZDB
Ham: W2ZDB Reboot: WDB8435
Web Site: http://www.sailboatreboot.com
Blog:http://blog.sailboatreboot.com
svReboot is offline   Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

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 Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
External Log Error sailPDQ36 Forum Admin, News & Announcements 21 07-23-2009 11:02 AM
Leece-neville 8mr Series Alternator External Regulation Conversion Lighthouse Repairs & Maintenance 0 03-28-2009 04:08 PM
How things can go wrong, grounding on a reef JeanneP General Cruising Forum 6 02-13-2007 09:46 PM

Our Communities

Our communities encompass many different hobbies and interests, but each one is built on friendly, intelligent membership.

» More about our Communities

Automotive Communities

Our Automotive communities encompass many different makes and models. From U.S. domestics to European Saloons.

» More about our Automotive Communities

RV & Travel Trailer Communities

Our RV & Travel Trailer sites encompasses virtually all types of Recreational Vehicles, from brand-specific to general RV communities.

» More about our RV Communities

Marine Communities

Our Marine websites focus on Cruising and Sailing Vessels, including forums and the largest cruising Wiki project on the web today.

» More about our Marine Communities


All times are GMT. The time now is 05:27 AM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2016, vBulletin Solutions, Inc.
SEO by vBSEO 3.6.0