Cruisers Forum
 


Join CruisersForum Today

Reply
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on Cruisers Forums. Advertise Here
 
Thread Tools Search this Thread Rate Thread Display Modes
Old 30-08-2018, 08:05   #1
Registered User

Join Date: Dec 2011
Posts: 19
Best Way to Attach GTO-15 Cable to Backstay Insulator

I'm replacing the antenna cable from my antenna tuner to the backstay insulator for my SSB. The current setup has the antenna cable connected to the insulator with a simple SS hose clamp making he bond between the wire strand and the insulator. While the system seems to work fine, I was wondering if there was a better way to connect the antenna cable to the insulator.

Thanks,
Bob Menches
Southport NC
Catalina 380
__________________

IOPSailor is offline   Reply With Quote
Old 30-08-2018, 08:27   #2
Registered User
 
Suijin's Avatar

Join Date: Feb 2013
Location: Annapolis MD; currently in Luperon DR
Boat: Valiant 40
Posts: 4,465
Re: Best Way to Attach GTO-15 Cable to Backstay Insulator

First of all I hope the cable is fastened to the wire above the insulator and not the insulator itself unless you have some special insulator.

Iíve used two hose clamps to fasten the wire to the back stay (rod in my case) and then wrapped well with rescue tape. Has worked fine.

Another option is a wire or ďbulldogĒ clamp. Make sure you get a SS one.

I prefer the hose clamps as it gives me more contact area and is lower profile.

Wire clamp:

Click image for larger version

Name:	IMG_4675.jpg
Views:	60
Size:	147.5 KB
ID:	176441
__________________

__________________
"Having a yacht is reason for being more cheerful than most." -Kurt Vonnegut
Suijin is offline   Reply With Quote
Old 30-08-2018, 08:33   #3
Registered User

Join Date: Dec 2011
Posts: 19
Re: Best Way to Attach GTO-15 Cable to Backstay Insulator

My wire is attached to the top of the insulator.
IOPSailor is offline   Reply With Quote
Old 30-08-2018, 08:49   #4
Moderator
 
Paul Elliott's Avatar

Cruisers Forum Supporter

Join Date: Sep 2006
Posts: 4,597
Images: 4
Re: Best Way to Attach GTO-15 Cable to Backstay Insulator

I've used a hose clamp and rescue tape. It holds up quite well. Instead of clamping the bare wire directly to the backstay, I crimped a wire lug to the GTO wire (one of the lugs with the glue-filled heat-shrink), and clamp the lug. This makes it less likely that water will wick between the insulation and wire.
__________________
Paul Elliott, S/V VALIS - Pacific Seacraft 44 #16 - Friday Harbor, WA
www.sailvalis.com
Paul Elliott is offline   Reply With Quote
Old 30-08-2018, 09:10   #5
Registered User

Join Date: Dec 2011
Posts: 19
Re: Best Way to Attach GTO-15 Cable to Backstay Insulator

Hereís my current setup in the attached photo.
Attached Thumbnails
Click image for larger version

Name:	F094CC0E-2CB6-4DC5-A458-C89B19E32252.jpg
Views:	181
Size:	400.8 KB
ID:	176442  
IOPSailor is offline   Reply With Quote
Old 30-08-2018, 09:25   #6
Registered User

Join Date: Apr 2017
Location: Tampa Bay, FL
Boat: Prout Event 34
Posts: 23
Re: Best Way to Attach GTO-15 Cable to Backstay Insulator

The proper way is a Betts split bolt fastened above the insulator.
https://www.alliedelec.com/thomas-be...iABEgL9RvD_BwE
john2445 is offline   Reply With Quote
Old 30-08-2018, 09:27   #7
Marine Service Provider

Join Date: Sep 2011
Location: California
Boat: Alerion Express 38 Yawl (former)
Posts: 427
Re: Best Way to Attach GTO-15 Cable to Backstay Insulator

Someone is bound to mention that you're better off not taping or tie-wrapping the GTO to the lower portion of the backstay. Use stand-offs, perhaps 3-4" long, to separate them. One way is to take a small piece of tubing and use a very long wire tie to go from the backstay, through the tubing, to the GTO, back through the tubing, and then cinch at the backstay.

Chuck
Chuck Hawley is offline   Reply With Quote
Old 30-08-2018, 09:54   #8
Registered User

Join Date: Aug 2009
Location: White Stone, VA
Boat: Cabo Rico 38 / Bayfield 32
Posts: 605
Images: 1
Re: Best Way to Attach GTO-15 Cable to Backstay Insulator

How about just eliminating the lower insulator? Attach GTO to the back stay below deck. Make sure no one grabs back stay while transmitting. I believe this is a simpler and more elegant solution.
Saltyhog is offline   Reply With Quote
Old 30-08-2018, 10:28   #9
Registered User
 
Suijin's Avatar

Join Date: Feb 2013
Location: Annapolis MD; currently in Luperon DR
Boat: Valiant 40
Posts: 4,465
Best Way to Attach GTO-15 Cable to Backstay Insulator

Quote:
Originally Posted by john2445 View Post
The proper way is a Betts split bolt fastened above the insulator.

https://www.alliedelec.com/thomas-be...iABEgL9RvD_BwE

I have one of those but itís either copper or bronze, never bothered to check. Iíve never seen them in stainless. My concern was galvanic corrosion although stainless and copper are relatively safe together.
__________________
"Having a yacht is reason for being more cheerful than most." -Kurt Vonnegut
Suijin is offline   Reply With Quote
Old 30-08-2018, 11:14   #10
Registered User
 
Ambler's Avatar

Join Date: Feb 2011
Location: Tasmania
Boat: Cape Barren Goose 37ft
Posts: 152
Re: Best Way to Attach GTO-15 Cable to Backstay Insulator

Quote:
Originally Posted by Saltyhog View Post
How about just eliminating the lower insulator? Attach GTO to the back stay below deck. Make sure no one grabs back stay while transmitting. I believe this is a simpler and more elegant solution.
I had never thought of that option. I assume you have a fibreglass or wooden boat. How does your transmission perform in a following sea when the deck is wet?
I think the safest option is to install an insulator above head height, such as the Sta-Lok one which has the horizontal drip grooves to shed splashes of water.
__________________
Wayne
yachtambler.blogspot.com
Ambler is offline   Reply With Quote
Old 30-08-2018, 12:46   #11
Moderator
 
a64pilot's Avatar

Cruisers Forum Supporter

Join Date: Oct 2013
Location: Albany Ga.
Boat: Island Packet 38
Posts: 25,983
Best Way to Attach GTO-15 Cable to Backstay Insulator

Based on the Gentlemanís advice at Dockside radio, I drilled and tapped one of the cable clamps as linked to for #10 screw and then of course use a terminal eye. Once installed, it seems that liquid electrical tape does a good job of keeping the corrosion at bay.Click image for larger version

Name:	IMG_0450.jpg
Views:	76
Size:	93.1 KB
ID:	176497Click image for larger version

Name:	IMG_0451.jpg
Views:	85
Size:	94.4 KB
ID:	176498

Itís corrosion that will I believe impair your connection and therefore signal.

You put the clamp on the wire between the insulators of course
a64pilot is online now   Reply With Quote
Old 30-08-2018, 13:16   #12
Registered User
 
Dougtiff's Avatar

Join Date: Jul 2015
Location: San Rafael, Ca.
Boat: Gaff rigged Ketch[Spray]37' on deck
Posts: 346
Re: Best Way to Attach GTO-15 Cable to Backstay Insulator

This set up has always been a bone of contention for me, all the different Rubegoldberg lash-ups, remember talking to a rep for High mod at a boat show year,s ago, when they first came out with there product,s as the product,s are a piece of jewelry, why couldn't it have a lug designed into it, to accept the ant. wire. For myself, after talking to a marine electronics teck. [ex Navy], i went with the ant. wire attached to the chain plate below deck, and a wet deck didn't make any difference, plus it saved the high cost of one more insulator, along with no corrosion at the connection.
Dougtiff is offline   Reply With Quote
Old 30-08-2018, 13:33   #13
Moderator
 
a64pilot's Avatar

Cruisers Forum Supporter

Join Date: Oct 2013
Location: Albany Ga.
Boat: Island Packet 38
Posts: 25,983
Best Way to Attach GTO-15 Cable to Backstay Insulator

One who replaced my rigging pretty much refused to only use one insulator, his belief and it may be valid was that a wet Bimini could still conduct enough RF to burn you if you touched the Bimini and or its frame, and of course if your leaking enough RF into the wet Sunbrella to hurt someone, it has to hurt with transmission and reception.
a64pilot is online now   Reply With Quote
Old 30-08-2018, 22:37   #14
Registered User

Join Date: Jan 2015
Location: Vancouver Canada
Boat: Santa Cruz 50
Posts: 6
Re: Best Way to Attach GTO-15 Cable to Backstay Insulator

I have used the following to connect tuner to backstay.

1) silver soldered a 6 inch piece of refrigeration copper capillary to GTO cable. Note that the heat will burn back the dielectric insulator, so a larger piece of heat shrink will be needed.

2)clamp the copper tube to the back stay with 2 burndy split-bolt connectors.

https://www.galco.com/techdoc/burn/ks27_cp.pdf)

3) use heatshrink wrap-around , which can be wrapped around and shrunk as opposed to slipped over the backstay.

https://www.samm.com/userfiles/produ...20Heads%20and%

4) black tyraps ( and short pieces of black plastic tube) to stand off and spiral warp the lead to the insulator. ( black are UV stable)
sailboatboy is offline   Reply With Quote
Old 01-09-2018, 10:26   #15
Marine Service Provider

Join Date: May 2011
Location: PDX
Boat: Gulfstar 50
Posts: 1,648
Re: Best Way to Attach GTO-15 Cable to Backstay Insulator

A friend who is a ham and an electrical engineer routed his lead to the lower chain plate. His thoughts were like ours that this gets rid of 1 insulator and makes for an internal connection to the backstay.

What he observed during a 2 year Mexico cruise was that the salt crystals that ended up on his transom created a path to ground for RF from the backstay. He noted burn marks on his transom.

I do not know how severe the burns were but he did end up putting in a lower insulator.

FWIW
__________________

evm1024 is offline   Reply With Quote
Reply

Tags
backstay insulator

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes Rate This Thread
Rate This Thread:

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
Backstay insulator at top but at bottom? felipe Marine Electronics 3 17-06-2013 15:16
Distance from mast to upper backstay insulator afmstm Marine Electronics 0 11-05-2012 15:01
For Sale: Ronstan Backstay Insulator for 5/16" Wire AllAboutMe Classifieds Archive 6 10-05-2011 21:40
Dynex Dux Instead of Backstay Insulator ? conachair Deck hardware: Rigging, Sails & Hoisting 1 19-02-2011 13:09
Standoffs - Antenna to Backstay Insulator Ramblin' Marine Electronics 16 22-06-2009 09:21



Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -7. The time now is 15:41.


Google+
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Social Knowledge Networks
Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2019, vBulletin Solutions, Inc.

ShowCase vBulletin Plugins by Drive Thru Online, Inc.