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Jan 23rd, 2013
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Interference from Ultrex on Humminbird Helix #13762208 11/08/20 11:39 PM
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LakeTylerMan Offline OP
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I have a one year old 12" Helix with Mega Down imaging and Mega 360. It's a wonderful system except the interference can be quite bad when the Ultrex runs. So recently I've been crappie fishing brush piles I put out. It produces a wonderful image of these cinder block and bamboo brush piles. But on spot lock or Ultrex running the image can disappear in the inference. I've gone to using Chirp which is a lower frequency and not affected. Any suggestions?

Re: Interference from Ultrex on Humminbird Helix [Re: LakeTylerMan] #13762647 11/09/20 05:40 AM
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bronco71 Offline
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Your power to your electronics should be completely separate from your trolling motor circuit and the wires should be apart from each other. I would not run the electronics off of a trolling battery either....


1999 Triton TX21/225 Mercury Optimax
Re: Interference from Ultrex on Humminbird Helix [Re: LakeTylerMan] #13762760 11/09/20 01:04 PM
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TomRom Offline
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What he said. If your graph set up is not wired back to the battery on a dedicated system you could have interference issues.

Last edited by TomRom; 11/09/20 01:12 PM.
Re: Interference from Ultrex on Humminbird Helix [Re: LakeTylerMan] #13762777 11/09/20 01:11 PM
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Wayne P. Online Content
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Originally Posted by LakeTylerMan
I have a one year old 12" Helix with Mega Down imaging and Mega 360. It's a wonderful system except the interference can be quite bad when the Ultrex runs. So recently I've been crappie fishing brush piles I put out. It produces a wonderful image of these cinder block and bamboo brush piles. But on spot lock or Ultrex running the image can disappear in the inference. I've gone to using Chirp which is a lower frequency and not affected. Any suggestions?


Describe your power connections for the display and MEGA 360.

Also do you have an on-board battery charger that does the trolling motor batteries and the starting battery?
If so do you disconnect the trolling motor from the battery when charging the trolling motor batteries?


Helix 12 CHIRP MEGA SI+ GPS G3N, 1198c SI, Helix 7 CHIRP MEGA SI GPS G3,
Helix 10 MEGA DI+ GPS G3N, SOLIX 12 SI, MEGA 360, RC-1
Re: Interference from Ultrex on Humminbird Helix [Re: Wayne P.] #13763044 11/09/20 04:18 PM
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LakeTylerMan Offline OP
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I have a Skeeter ZX 250. And I have the factory set bundle of wires to the bow. One set at 12 volts was unused. I put in a circuit bar and hooked THAT SET of red and black wires to the Helix unit through the circuit bar. The wires were not used for anything else. But I will check to make sure the Mega 360 is not somehow tied in with the wires for the old Lowrance Gen 3. The images on the Helix and Mega 360 are spectacular when I have no interference. So let me just make sure I made it simple. Red and black unused wires power the Helix. I can't remember whether the Mega 360 is powered with the Lowrance (think it goes to the same circuit bar as the Helix). Given the Ultrex is 36 volts, I'd never hook up a 12 volt device to a 36 volt system.

The unit is on the bow. And everything powered in the bow has wiring right there in a five inch square area.
The recommendation I got to go back to the non trolling motor battery is essentially how the boat is wired now.
Thanks

Re: Interference from Ultrex on Humminbird Helix [Re: Wayne P.] #13763045 11/09/20 04:19 PM
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LakeTylerMan Offline OP
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Yes. Four bank battery charger.

Re: Interference from Ultrex on Humminbird Helix [Re: Wayne P.] #13763049 11/09/20 04:20 PM
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LakeTylerMan Offline OP
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Turn 36 V circuit breaker to off position when I charge batteries.

Re: Interference from Ultrex on Humminbird Helix [Re: LakeTylerMan] #13763167 11/09/20 05:31 PM
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Originally Posted by LakeTylerMan
Turn 36 V circuit breaker to off position when I charge batteries.


As a test, disconnect the battery charger leads to the starting battery to determine if the charger is the path for RFI.

Also your statement about using CHIRP makes no sense. The unit CHIRPs the MEGA frequency or the 455 frequency.

[Linked Image]

[Linked Image]



Last edited by Wayne P.; 11/09/20 05:42 PM.

Helix 12 CHIRP MEGA SI+ GPS G3N, 1198c SI, Helix 7 CHIRP MEGA SI GPS G3,
Helix 10 MEGA DI+ GPS G3N, SOLIX 12 SI, MEGA 360, RC-1
Re: Interference from Ultrex on Humminbird Helix [Re: Wayne P.] #13763501 11/09/20 09:46 PM
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LakeTylerMan Offline OP
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Look man I worked as a geologist for 35 years I know that subject better. I have two transducers, The transducer at the bottom of the trolling motor and the round spinny thing on the stick hooked to the trolling motor. The spinny one requires its own power and is obviously being interfered with. The transducer at the bottom of the trolling motor is powered by the unit. Regardless if I am calling the wrong terms, the standard sonar is not disrupted by the trolling motor. If for some reason that battery charger is the source of the interference by simply being hooked up to the power battery what are my alternatives?

I'm assuming you are suggesting I take the leads off starting battery and then run the unit. Too bad I simply don't have an on/off switch in that circuit because if you are familiar with a ZX 250, I have to unscrew and remove a plate covering the area where the battery stores. It is a PITA.

Re: Interference from Ultrex on Humminbird Helix [Re: LakeTylerMan] #13763595 11/09/20 10:56 PM
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Originally Posted by LakeTylerMan
Look man I worked as a geologist for 35 years I know that subject better. I have two transducers, The transducer at the bottom of the trolling motor and the round spinny thing on the stick hooked to the trolling motor. The spinny one requires its own power and is obviously being interfered with. The transducer at the bottom of the trolling motor is powered by the unit. Regardless if I am calling the wrong terms, the standard sonar is not disrupted by the trolling motor. If for some reason that battery charger is the source of the interference by simply being hooked up to the power battery what are my alternatives?

I'm assuming you are suggesting I take the leads off starting battery and then run the unit. Too bad I simply don't have an on/off switch in that circuit because if you are familiar with a ZX 250, I have to unscrew and remove a plate covering the area where the battery stores. It is a PITA.


No the battery charger would not be the SOURCE for RFI, just the PATH. You disconnect the PATH to verify the trolling motor is the source.


Bottom line is your trouble shooting is only as good as the effort you put into it.


Helix 12 CHIRP MEGA SI+ GPS G3N, 1198c SI, Helix 7 CHIRP MEGA SI GPS G3,
Helix 10 MEGA DI+ GPS G3N, SOLIX 12 SI, MEGA 360, RC-1
Re: Interference from Ultrex on Humminbird Helix [Re: LakeTylerMan] #13766259 11/11/20 05:02 PM
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Jeff From Iowa Offline
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You need to run a ground wire from the tm head, to your negative battery side.

I just ground a bare spot on my tm head and ran the wire down and hose clamped it the other end goes up the shaft to the negative wire for tm power on my bow.

Ive shared this with a few people on the water and it has gotten rid of m360 and side interference when the tm is running.


Dont try and take someones shine away..... Doing so just shows YOUR weak character.
Re: Interference from Ultrex on Humminbird Helix [Re: LakeTylerMan] #13774859 11/18/20 02:07 AM
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KenTx1962 Offline
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Open your Ultrex head unit, there is a 3 amp fuse there, if that fuse is blown then your lower unit has no ground, and that's why you have interference. 95%+ chance this is your problem, simple solution.


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Re: Interference from Ultrex on Humminbird Helix [Re: LakeTylerMan] #13774863 11/18/20 02:09 AM
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KenTx1962 Offline
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Start watching this at the 1:52 mark, I show you where it is exactly



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10% off 6th Sense 6thsensefishing.com/ &
www.WaterLandco.com with code Ken10
Support my channel shopping Tackle Warehouse with this link http://bit.ly/2S4dFY6
Lew's Rods http://bit.ly/37HLJQf & reels http://bit.ly/36FJpb2
Mercury Marine Pro Staff
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