tomoad
Active Member
put one on the bow, transducer on the trolling motor.when i hit the pedal lines come upon the screen. what can be done to remedy this?
998c interference
- Thread starter tomoad
- Start date
GotMyAlly
Well-Known Member
Does it share a battery with the TM? Got it's own power leads to the batt, or spliced into the TM wires?
tomoad
Active Member
i have a 24v trolling motor. i came off one of the batteries to the unit, and yes power leads from battery to the unit
SLOmofo
Well-Known Member
The ground of the trolling motor and the unit have to have the same or common ground. Moving the transducer away from the motor like with a skimmer mount can help. It's the pulse modulation that gives infinite speeds that produces the lines.
tomoad
Active Member
i have the same common ground, also moved the transducer back on the motor---no help....
90 5.0
Active Member
Humming bird makes a interference thingy to go on the power wife to straighten it out.
The birds are more finicy with interference than others.
The birds are more finicy with interference than others.
tomoad
Active Member
well i tried the old ground wire from the trolling motor to the unit ground trick & It didn't work, next im going to try the ground from the unit to the ground on the trolling plug. if that doesn't work guess i will try the interference thingy they got for 60 bucks.
white03
Active Member
i got that interferance thingy...
...its called a TMC 1...when it gets warm enough I'll put it on and let you know if it works because I have the same problem on my bow mounted 997c SI
...its called a TMC 1...when it gets warm enough I'll put it on and let you know if it works because I have the same problem on my bow mounted 997c SI
Allyfishing
Well-Known Member
Trust me, that TMC-1 made by Humminbird really works. Its a bit bulky so ya have to find a place up front to mount it but it got rid of my interference on my Lowrance units.
i always run a fresh set of wires from the cranking battery, fused, to a blade style fuse holder for all my electronics etc. I still had vertical lines on 2d sonar and solid "columns" on side scan and downscan.
It is an RF choke designed to be installed in between the plug and the foot pedal on the power wires.
i always run a fresh set of wires from the cranking battery, fused, to a blade style fuse holder for all my electronics etc. I still had vertical lines on 2d sonar and solid "columns" on side scan and downscan.
It is an RF choke designed to be installed in between the plug and the foot pedal on the power wires.
white03
Active Member
Actually I called H'bird and they said to install in between the foot and the motor. Having said that I've seen pics on BBC of installations between the plug and the foot. Not sure which I'll do. One thing that bothers me about putting it between the plug and the foot is the different gauge wires: the wires coming to the foot from the plug are significantly larger than the wires that come with the choke, but the choke wires are same gauge as the wires between the foot and the motor.
SLOmofo
Well-Known Member
I would think the manufacturer would know best.
Allyfishing
Well-Known Member
Wait a minute...that means you would have to cut thru the sheathing that holds the powers wires AND the steering cables from the foot pedal to the motor head???
Think about it, every time you deploy and stow the motor those cable spices are constantly moving. If you cut the wires in between the foot pedal and the plug (like the directions say that come with it) and splice it in there and then mount the choke in that area the wires will be secured unless your foot pedal is not secured to the deck.
I installed mine on my last boat and the wires on the choke AND the wires on my MG from the pedal to the plug were 10 ga. That's more than sufficient gauge wire for that application. Just make sure you use a very good crimping tool to connect your wires and cover with shrink tubing
just my 2 cents
tomoad
Active Member
put the hummingbird choke thingy on and it took away the interference