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987 interference
#11920465
11/07/16 02:16 AM
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Joined: Oct 2004
Posts: 12,182
Mike Keenan
OP
TFF Guru
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OP
TFF Guru
Joined: Oct 2004
Posts: 12,182 |
I was using my buddies boat today and he has two 987's on his boat. The one on the console works like a champ but the one on the bow gets all distorted when you activate the minn Kota trolling motor. It goes from reading normal depth to 250' then back to normal as soon as I let off the button and I know I didn't find a drop off... any thoughts, concerns or what I should look at to figure this out? It's a pain in the butt
R.I.P. Mike "pappy" "broken rod" Green born 07-16-62 on to better fishing 06-10-08. www.basscat.com
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Re: 987 interference
[Re: Mike Keenan]
#11920515
11/07/16 02:50 AM
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Joined: Dec 2012
Posts: 6,678
44 Diesel
TFF Celebrity
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TFF Celebrity
Joined: Dec 2012
Posts: 6,678 |
RF interference, the possible fixes are endless. First make sure the graphs are not wired to the trolling motor batteries. Make sure all transducer and power leads are not touching the trolling motor power leads. Has this been an issue for a while or just start. What model trolling motor are you using. What transducer are you using an external or a US2 inside the trolling motor? Some minn kota trolling motors have a fuse inside the head for this reason.
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Re: 987 interference
[Re: 44 Diesel]
#11920845
11/07/16 01:54 PM
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Joined: Oct 2004
Posts: 12,182
Mike Keenan
OP
TFF Guru
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OP
TFF Guru
Joined: Oct 2004
Posts: 12,182 |
It's a Minn Kota maxxum and it's an older trolling motor too. As far as I know it's been going on for a while. This was the first time I took out the boat.
R.I.P. Mike "pappy" "broken rod" Green born 07-16-62 on to better fishing 06-10-08. www.basscat.com
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Re: 987 interference
[Re: Mike Keenan]
#11921219
11/07/16 05:01 PM
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Joined: Jan 2007
Posts: 2,452
UJC
Extreme Angler
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Extreme Angler
Joined: Jan 2007
Posts: 2,452 |
I found ferrite rings to be effective on HBs. I called HB years ago when I had a bird and they shipped it gratis. RF disappeared.
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Re: 987 interference
[Re: UJC]
#11921360
11/07/16 05:58 PM
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Joined: Oct 2004
Posts: 12,182
Mike Keenan
OP
TFF Guru
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OP
TFF Guru
Joined: Oct 2004
Posts: 12,182 |
Where can I find these ferrite rings?
R.I.P. Mike "pappy" "broken rod" Green born 07-16-62 on to better fishing 06-10-08. www.basscat.com
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Re: 987 interference
[Re: Mike Keenan]
#11921365
11/07/16 06:00 PM
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Joined: Jul 2014
Posts: 4,340
Bobby Milam
TFF Team Angler
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TFF Team Angler
Joined: Jul 2014
Posts: 4,340 |
Humminbird sells them but they are proid of them. I will eventually just run to radioshack and grab a couple. They are pretty cheap there
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Re: 987 interference
[Re: Bobby Milam]
#11921559
11/07/16 07:34 PM
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Joined: Oct 2004
Posts: 12,182
Mike Keenan
OP
TFF Guru
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OP
TFF Guru
Joined: Oct 2004
Posts: 12,182 |
You just clamp the rings on the power and transducer cables right?
R.I.P. Mike "pappy" "broken rod" Green born 07-16-62 on to better fishing 06-10-08. www.basscat.com
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Re: 987 interference
[Re: Mike Keenan]
#11923768
11/08/16 10:31 PM
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Joined: Jan 2007
Posts: 2,452
UJC
Extreme Angler
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Extreme Angler
Joined: Jan 2007
Posts: 2,452 |
I don't recall which cable I placed the HB ferrite ring on. But I went to Radio Shack and bought two more. I now have Lowrance at the bow. I place each ferrite on power, sonar and another cable I don't recall. Visit this HB page . It should be useful for HB and other brands.
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Re: 987 interference
[Re: Bobby Milam]
#11923822
11/08/16 11:04 PM
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Joined: Nov 2010
Posts: 5,085
Wayne P.
TFF Celebrity
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TFF Celebrity
Joined: Nov 2010
Posts: 5,085 |
Humminbird sells them but they are proid of them. I will eventually just run to radioshack and grab a couple. They are pretty cheap there Humminbird has the TMC-1 that attaches to the trolling motor power cord.
Helix 12 CHIRP MEGA SI+ GPS G3N and G4N, 1198c SI, SOLIX 10 SI G3, Helix 8 MEGA SI+ GPS G4N, SOLIX 12 SI and G3, MEGA 360, MEGA LIVE TL, RC-1
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Re: 987 interference
[Re: Bobby Milam]
#11935281
11/15/16 04:44 PM
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Joined: Oct 2004
Posts: 12,182
Mike Keenan
OP
TFF Guru
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OP
TFF Guru
Joined: Oct 2004
Posts: 12,182 |
Thanks guys, since my buddy is not inclined to do the work, I guess I get to work on it...
R.I.P. Mike "pappy" "broken rod" Green born 07-16-62 on to better fishing 06-10-08. www.basscat.com
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Re: 987 interference
[Re: Mike Keenan]
#11947216
11/23/16 02:28 AM
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Joined: Oct 2004
Posts: 12,182
Mike Keenan
OP
TFF Guru
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OP
TFF Guru
Joined: Oct 2004
Posts: 12,182 |
Will these ferrit rings go bad? There's one on his transducer cable now.. or maybe should he do the much needed update and hook the front fishfindee to the cranking battery?
R.I.P. Mike "pappy" "broken rod" Green born 07-16-62 on to better fishing 06-10-08. www.basscat.com
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Re: 987 interference
[Re: Mike Keenan]
#11947233
11/23/16 02:38 AM
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Joined: Dec 2012
Posts: 6,678
44 Diesel
TFF Celebrity
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TFF Celebrity
Joined: Dec 2012
Posts: 6,678 |
They don't go bad. Do the proper wiring first then go from there. Keep all ff cables away from trolling motor power cables
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Re: 987 interference
[Re: 44 Diesel]
#11947740
11/23/16 02:09 PM
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Joined: Oct 2004
Posts: 12,182
Mike Keenan
OP
TFF Guru
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OP
TFF Guru
Joined: Oct 2004
Posts: 12,182 |
R.I.P. Mike "pappy" "broken rod" Green born 07-16-62 on to better fishing 06-10-08. www.basscat.com
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