Stern lights on HF antenna - SailNet Community
 
LinkBack Thread Tools
post #1 of 7 Old 10-25-2010 Thread Starter
Member
 
Join Date: Jan 2007
Location: Annapolis
Posts: 86
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 9
 
Stern lights on HF antenna

This justs sounds wrong...

I had my almost new boat surveyed. The stern lights were hidden by the dinghy when on the davits.

The owner said he'd move the lights. He mounted a braket with new stern lights on the HF whip antenna. Will there be transmission/receiver issues when the stern light is on. Will there be stern light problems when one transmits?

This just doesn't seem smart to me, but I'm not a radio expert. Thoughts??

Cliff
CliffL is offline  
Quote Quick Reply Share with Facebook
Sponsored Links
Advertisement
 
post #2 of 7 Old 10-25-2010
Telstar 28
 
sailingdog's Avatar
 
Join Date: Mar 2006
Location: New England
Posts: 43,290
Thanks: 0
Thanked 14 Times in 12 Posts
Rep Power: 14
         
Having the lights on the whip antenna is not the brightest of ideas. Is there anyplace more appropriate that you can mount the stern light.

Sailingdog

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Telstar 28
New England

You know what the first rule of sailing is? ...Love. You can learn all the math in the 'verse, but you take
a boat to the sea you don't love, she'll shake you off just as sure as the turning of the worlds. Love keeps
her going when she oughta fall down, tells you she's hurting 'fore she keens. Makes her a home.

—Cpt. Mal Reynolds, Serenity (edited)

If you're new to the Sailnet Forums... please read this
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
.

Still—DON'T READ THAT POST AGAIN.
sailingdog is offline  
Quote Quick Reply Share with Facebook
post #3 of 7 Old 10-25-2010
old guy :)
 
rikhall's Avatar
 
Join Date: Feb 2008
Location: Fredericton, NB, Canada
Posts: 1,060
Thanks: 13
Thanked 14 Times in 12 Posts
Rep Power: 8
 
Quote:
Originally Posted by sailingdog View Post
Is there anyplace more appropriate that you can mount the stern light.
Like, maybe, the stern rail? Like SailingDog says - there has to be somewhere better.

Rik

Irwin Citation 34
Mystery
rikhall is offline  
Quote Quick Reply Share with Facebook
post #4 of 7 Old 10-25-2010
Telstar 28
 
sailingdog's Avatar
 
Join Date: Mar 2006
Location: New England
Posts: 43,290
Thanks: 0
Thanked 14 Times in 12 Posts
Rep Power: 14
         
Or the dinghy davits... they're the problem..so why not make them part of the solution.

Sailingdog

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

Telstar 28
New England

You know what the first rule of sailing is? ...Love. You can learn all the math in the 'verse, but you take
a boat to the sea you don't love, she'll shake you off just as sure as the turning of the worlds. Love keeps
her going when she oughta fall down, tells you she's hurting 'fore she keens. Makes her a home.

—Cpt. Mal Reynolds, Serenity (edited)

If you're new to the Sailnet Forums... please read this
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
.

Still—DON'T READ THAT POST AGAIN.
sailingdog is offline  
Quote Quick Reply Share with Facebook
post #5 of 7 Old 10-26-2010
Mermaid Hunter
 
SVAuspicious's Avatar
 
Join Date: Oct 2006
Location: on the boat - Chesapeake
Posts: 3,984
Thanks: 0
Thanked 158 Times in 141 Posts
Rep Power: 9
 
It shouldn't be a problem as long as you use a conventional light bulb. There is a small chance that the power cable to the light will pick up RF when transmitting and carry that back into the boat where you could have some interference.

If you change to an LED stern light there is a good chance the light will flicker when you transmit.

All-in-all however there are usually lots of options for placement so I'd have the light moved off the antenna to avoid having a problem later.

sail fast and eat well, dave
S/V Auspicious
AuspiciousWorks.com
beware "cut and paste" sailors.


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
SVAuspicious is offline  
Quote Quick Reply Share with Facebook
post #6 of 7 Old 10-26-2010 Thread Starter
Member
 
Join Date: Jan 2007
Location: Annapolis
Posts: 86
Thanks: 0
Thanked 0 Times in 0 Posts
Rep Power: 9
 
Thanks all

As I suspected. Thanks for the advice all...will move to the dingy davits!

Cliff
CliffL is offline  
Quote Quick Reply Share with Facebook
post #7 of 7 Old 10-26-2010
Glad I found Sailnet
 
Bene505's Avatar
 
Join Date: Jul 2008
Posts: 3,816
Thanks: 14
Thanked 51 Times in 50 Posts
Rep Power: 8
   
I think the wires for the stern light will interfere with the HF antenna pattern and gain. You would not get full strength in the direction of the wires. After all, one of those wires is grounded. The other wire would have some effect perhaps too.

The effect may be small, and it sometimes seems like antennas are more like magic than science, so I really have no idea what actual effect it would have. You could test it by turning the boat very slowly as you transmit to several known receiver locations - with people there who will note your broadcast heading and takes dutiful notes. You would need a bunch of receivers at different ranges to see if there is an effect.

Better yet, put the stern light somewhere else.

Regards,
Brad

.
.
Great minds discuss ideas;
Average minds discuss events;
Small minds discuss people.
.
The best minds discuss sailing (and a little bit of politics). I don't know why. It's a mystery!
.
Bene505 is online now  
Quote Quick Reply Share with Facebook
Reply

Quick Reply
Message:
Options

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:
OR

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.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page



Similar Threads
Thread Thread Starter Forum Replies Last Post
SSB Antenna dpoissant Electronics 7 09-10-2010 10:24 PM
Jackline: to stern or not to stern dreuge Gear & Maintenance 10 12-24-2009 12:23 PM
Identification Lights & Nav Lights on Sailing Vessels Boasun General Discussion (sailing related) 10 02-13-2009 09:42 AM
Bow and Stern Running Lights Duke 7184 Morgan 1 11-14-2006 06:54 PM

Posting Rules  
You may post new threads
You may 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 On
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome