Author Topic: TM interference  (Read 5100 times)

0 Members and 1 Guest are viewing this topic.

Offline Perch Jerker

  • Jr. Member
  • **
  • Joined: Jan 2010
  • Location: Flomaton Alabama
  • Posts: 23
  • Unit(s): 1198
  • Software: 6.490
  • Accessories: transducer select switch
TM interference
« on: January 26, 2013, 11:18:32 AM »
lots of crappie, all had lock jaw! also a little TM interference, which        I corrected by twisting the power leads from battery to unit.


Offline reddog

  • Full Member
  • ***
  • Joined: Jun 2009
  • Location: Iowa
  • Posts: 162
    • My pictures
  • Unit(s): 2)997 C SI, 788CI, 787C2, 1197 1198
  • Accessories: Ipilot Link
Re: TM interference
« Reply #1 on: January 26, 2013, 03:11:30 PM »
Can you explain this a little more? You twisted the positive and negative leads from the battery to the trolling motor?
Hate to see her go, but love to watch her leave.

Offline LocDown

  • Sr. Member
  • ****
  • Joined: Apr 2011
  • Location: Wichita, Ks
  • Posts: 485
    • Fishing Videos
  • Unit(s): 1199 H12G2N-HW-MSI
Re: TM interference
« Reply #2 on: January 26, 2013, 03:30:13 PM »
I think he meant twisted pair. You and twist them together with a cordless drill by holding one end and "drilling" the other end until you get a good twist.

 ..kind of like this:
« Last Edit: January 26, 2013, 03:33:00 PM by LocDown »

Offline Perch Jerker

  • Jr. Member
  • **
  • Joined: Jan 2010
  • Location: Flomaton Alabama
  • Posts: 23
  • Unit(s): 1198
  • Software: 6.490
  • Accessories: transducer select switch
Re: TM interference
« Reply #3 on: January 26, 2013, 08:05:43 PM »
Yes Red Dog ,chuck up the power wires in a cordless drill with the opposite end secured, twist until snug. It will sometimes do wonders for interference.  Ray









Offline Bob B

  • Hero Member
  • *****
  • Joined: Oct 2010
  • Location: Creve Coeur, Il
  • Posts: 1568
  • Unit(s): 1197c si, 1198c si
  • Software: 6.310, 6.490
Re: TM interference
« Reply #4 on: January 26, 2013, 08:43:17 PM »
Yes, twisting the wires together changes the electrical characteristics of the wire and will significantly reduce interference.  There are "chokes" or ferrite coils that can be put around the wires near the unit that will help also.
**Looking for the one that makes it all worthwhile**

Offline reddog

  • Full Member
  • ***
  • Joined: Jun 2009
  • Location: Iowa
  • Posts: 162
    • My pictures
  • Unit(s): 2)997 C SI, 788CI, 787C2, 1197 1198
  • Accessories: Ipilot Link
Re: TM interference
« Reply #5 on: January 26, 2013, 09:44:14 PM »
I have the ferrite ring on my terrova. Just hadn't heard of here twisted wire trick. simple enough, thanks.
Hate to see her go, but love to watch her leave.

Offline rnvinc

  • Hero Member
  • *****
  • Joined: Nov 2009
  • Location: Western KY
  • Posts: 4329
  • Unit(s): 1197c SI Combo, SOLIX G2 MSI
  • Software: Dependent on whim
  • Accessories: AS GRHA, MEGA 360, LowBird LSS 1 & 2
Re: TM interference
« Reply #6 on: January 26, 2013, 10:36:56 PM »
Start the twisted wire pair with about twice the length of run needed because the twisted pair becomes shorter the more it is twisted...

Rickie

Offline Ken L

  • Jr. Member
  • **
  • Joined: Jan 2013
  • Location: Morristown, NJ
  • Posts: 48
  • Unit(s): 598C HD DI-SI
  • Software: 6.460
  • Accessories: none
Re: TM interference
« Reply #7 on: February 08, 2013, 02:12:20 PM »
You may or may not want to do this but if you strip the outer covering off the power cable you can then separate the leads. If you then clamp the plug in place you can wrap the wires around each other hand over hand and they won't coil up. This will shorten the length but only by a fraction of that if you just twist the whole thing in a drill. Another way to do this would be to fasten one lead in place and spin the other with a drill. If you then slowly bring both leads together they will wrap around each other the same way with no coiling unless you overdo it with the drill. You could then wrap it in electrical tape or find another way to protect it. There could be some installations where this might be a better solution.  Long before smartphones and digital everything telephone calls were always transmitted over pairs of wires and they had to be twisted this way or the call would have been unintelligible.


Share me

Digg  Facebook  SlashDot  Delicious  Technorati  Twitter  Google  Yahoo

 

Related Topics

  Subject / Started by Replies Last post
8 Replies
6509 Views
Last post January 12, 2010, 07:43:29 PM
by garyr
3 Replies
3129 Views
Last post March 08, 2011, 07:00:52 PM
by Sigler
0 Replies
2713 Views
Last post April 24, 2011, 11:05:28 AM
by FlatsFokker
1 Replies
3236 Views
Last post June 27, 2011, 01:53:40 PM
by Humminbird_Greg
14 Replies
10607 Views
Last post July 15, 2011, 09:15:58 PM
by Double Digit
2 Replies
3991 Views
Last post October 30, 2011, 08:53:59 AM
by Mark997
12 Replies
6857 Views
Last post December 11, 2012, 07:22:15 AM
by rnvinc
9 Replies
5404 Views
Last post April 09, 2013, 01:12:06 PM
by RGecy


anything
SimplePortal 2.3.3 © 2008-2010, SimplePortal