Notices
Marine Electronics Forum

Help, please. Simrad pigtail to B175m

Old 01-09-2016, 06:41 AM
  #1  
Admirals Club Admiral's Club Member
Thread Starter
 
Join Date: Feb 2014
Location: Louisiana
Posts: 1,735
Received 12 Likes on 11 Posts
Question Help, please. Simrad pigtail to B175m

I was getting bad results on b175m hooked to Simrad evo2. (Xid fine, just intermittent depth readings and lots of unremoveable clutter. B175hw on same network gets much better readings.)

I checked the junction box wiring and found the following:

Pigtail Ducer
Bare. Bare
Black. Black
Red. Blue
Yellow. Orange
Bare. Brown
Blue. Nothing
Orange. Nothing
Nothing. Red
Nothing. Green
Nothing. White
Nothing. Bare

I don't know which Is inner and outer bare bares. Is the difference between the two bare wires obvious on both the pigtail and the transducer cable?

What type of sounder results would one expect to see if the Airmar outer bare wire were not connected to anything? (That is, only the brown Airmar wire is connected to the pigtail's outer bare wire.)

What would one expect to see if the inner bare wire and the outer bare wires were mixed up? (That is, if one mistook one for the other in hooking it up) ;?
Old 01-09-2016, 07:32 AM
  #2  
Senior Member
 
Join Date: Feb 2003
Location: Saint Francisville, LA
Posts: 1,832
Likes: 0
Received 26 Likes on 15 Posts
Default

the bare wires are usually a shielding "mesh" and if not grounded then the shielding would not be as effective.

Last edited by knotreel; 01-09-2016 at 07:43 AM.
Old 01-09-2016, 10:37 AM
  #3  
Admirals Club Admiral's Club Member
 
Join Date: Jun 2011
Location: Boston/Cape Cod
Posts: 1,263
Likes: 0
Received 5 Likes on 5 Posts
Default

my b175hw is a clutter bomb
Old 01-09-2016, 10:53 AM
  #4  
Senior Member
 
Join Date: Feb 2005
Location: Norway
Posts: 14,698
Likes: 0
Received 695 Likes on 553 Posts
Default

The inner bare is inside the shield of the transducer depth signals. The outer bare is in the outer bundle.
Old 01-09-2016, 10:54 AM
  #5  
Senior Member
 
Join Date: Feb 2005
Location: Norway
Posts: 14,698
Likes: 0
Received 695 Likes on 553 Posts
Default

Originally Posted by Captain Frosty View Post
my b175hw is a clutter bomb
All my sounders give a crystal clear image, but I've taken a lot of care when routing transducer cables and power distribution.
Old 01-12-2016, 03:41 PM
  #6  
Admirals Club Admiral's Club Member
 
Join Date: Jan 2014
Location: St. Augustine, FL
Posts: 1,385
Likes: 0
Received 80 Likes on 56 Posts
Default

I have pretty lazy waiting at the moment since I'm basically piecing together an upgrade one part at w time. I don't have much to compair to but I don't think it's as sensitive as you think. If there ARE dos and donts I'd love to know them. I'm an advanced DYIer but don't have years of trial and error like a pro.
Old 01-12-2016, 04:06 PM
  #7  
Senior Member
 
Join Date: Feb 2005
Location: Norway
Posts: 14,698
Likes: 0
Received 695 Likes on 553 Posts
Default

I don't wire my boat based on trial and error I do it based on theoretical and practical knowledge about shielding, grounding and noise reduction.

How challenging it is depends of amount of equipment onboard, more equipment means more noise aggressors and less free space to route wires away from other systems.
Old 01-13-2016, 02:48 AM
  #8  
Senior Member
 
Join Date: Apr 2012
Location: Maryland
Posts: 242
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by abbor View Post
I don't wire my boat based on trial and error I do it based on theoretical and practical knowledge about shielding, grounding and noise reduction.

How challenging it is depends of amount of equipment onboard, more equipment means more noise aggressors and less free space to route wires away from other systems.
Is there a shield, or some sort of sleeve we could utilize to shield sounder wiring? Copper or PvP tubing?

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

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell My Personal Information

Copyright © 2018 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.