World Sea Fishing Forums banner

1 - 9 of 9 Posts

·
Registered
Joined
·
2,079 Posts
Discussion Starter · #1 ·
Probably can guess what the answer will be but here goes. Recently bought a second boat for trailering around. Its got a Lowrance lms 240 plotter/sounder combo. I just happen to have a spare colour fishfinder kicking around (as you do!) and was thinking about sticking that on as well, the idea being I can have one zoomed at one level and the other set differently.. so the questions is.... will they interfere with each other?? would it work? the other finder is a new navman 4350. Is that a better unit, in which case I suppose I could just disconnect the lowrance transducer??
 

·
Registered
Joined
·
5,557 Posts
Both use 200hz transducers so unless they process the signals differently I would guess they would interfere with each other. The people who would know would be Lowrance and Navman. Don't bother with Navman though as you will never get an answer from their supposed customer service department.

The other company that may be able to help are http://www.airmar.com/ they are the ones who make the transducers.

The practical way, and probably quickest, is to take the Navman unit out with you and connect up the power leads to the battery and hold the transducer underwater, turn the Lowrance display on and off and see if it makes any difference to the Navman display and vice versa.
 

·
Registered
Joined
·
5,980 Posts
thanks chris, sort of confirms what I suspected anyway. My own fault for being seduced into buying more electronics than I actually need!

might be worth trying the 2 side by side over some known marks to see which gives prettier pictures though!
they will interfere, as ours do, Koden cvs 108, and Garmin 188c, as the transducers are fairly close to each other, however we used to have a Lowrance LMS 350 (lovely set) now deceased, with its transducer near the Koden and they both worked fine, try placing the transducers further apart and try them. Hope this helps.
 

·
Registered
Joined
·
2,079 Posts
Discussion Starter · #5 ·
they will interfere, as ours do, Koden cvs 108, and Garmin 188c, as the transducers are fairly close to each other, however we used to have a Lowrance LMS 350 (lovely set) now deceased, with its transducer near the Koden and they both worked fine, try placing the transducers further apart and try them. Hope this helps.
oohh! might be worth a go then! one transducer is currently on the transom one side so thought about mounting t'other one on a 'stick' (technical term!) and lashing it on the other side of the transom and see what gives. If it works then I'll mount it permanently, or better still get a thru-hull replacement and stick it as far forward as I can
 

·
Registered
Joined
·
51 Posts
They probably will interfere, however, if it was me I would run one at a time and see which one is the best sounder and use it. It could be the plotter/sounder combo or use the plotter and the separate sounder. In either case you could use the other sounder as a backup.
 

·
Registered
Joined
·
12,181 Posts
From the length of time these "entry level" sonars last, I would hang on to both, it surely wont be long before one of them goes "tits up", you wont be able to get it repaired, nobody will reply to your enquirees, & if they do, they will offer you a "service exchange" at a price you can buy brand spanking new for, if you shop around!:nonono:
Read the thread on Navman Repairs in this forum for an idea of the problem!:g:
blueskip
 

·
Registered
Joined
·
51 Posts
Blueskip: I guess that pretty much sums it up... Due to the technology used now there is very little a service engineer can do with these units. They are pretty much all an lcd, a main PCB and a transducer. The transducer can be replaced reasonably cost effectively but the rest is pretty much a bin job unless the repair is something very simple.

The only solution I can offer is to buy a really expensive one :)
 

·
Registered
Joined
·
2,079 Posts
Discussion Starter · #9 ·
pull a really expensive one to bits and you'll probably find.. a main pcb, an lcd/tft and a transducer as well, with much the same approach to their repair probably.

I have always thought that the phrase 'fishfinder' was an absolute marketing masterstroke by whoever came up with it.

and us anglers are always suckers for something which promises fish!!

so what I want now is an 'underwater profiling device'

show me what the bottom looks like and if the french and spanish haven't hoovered em all up I'll try find the fish myself!
 
1 - 9 of 9 Posts
Top