transducers, side by side

[litenup]

Looking for advice. I want to run a Navman 450 (colour) and a lowrance 135x(B&W) together. Can I put the transducers side by side or do I put one on each side of boat. Any comments may help
thanks Pete

[MulletMan]

NO!
NO!
NO!

You will undoubtadly get major interference between the transducers as they normally both run on 200 Hz (50 Hz being a less effective option)

When you have a few boats all anchored up together with their sounders ON, interference will usually be present on all the sounders in the area.

Most decent sets have an "Interference Rejection" knob/button on them that inhibits this nuisance problem but in the process it also reduces the effectiveness of the set itself.

You could always just hook them up in the back yard and turn them on and see what happens before the hole drilling starts. Dry testing should only be done for a few minutes though highly unlikely to do any harm but don't leave them pinging away on the cement for too long.

I once had a colour Marintec and an older Marintec mono running together, got serious interference all the time but by fiddling with the gains and all sorts of tricky things, they did both work "fairly well"...............

[litenup]

TPP, you have just confirmed my suspicions. I was hoping to put them on a plate to save more holes in transom, as well as being lazy,ahwell. Thanks for your input. Pete

[J-MAN]

You can put them side by side if you only want to run them one at a time and they do not cause a disruption of clean water flow over the transducer faces.

J-Man

[GBC]

Had a JRC and a Lowrance side by side on one boat - transducers were about 250mm apart. Didn't get any interference until the water was too deep for the Lowrance to work and the jrc started to really crank (130m @ 100% gain).

Lowrance was a cheaper B&W before any Lowrance lovers get upset.

I'd take them both out to sea on a temporary mount and see how they go before completely shelving the idea.

C.J.

[finding_time]

Bet you wish you still had that JRC gbc!! To bad it was mine

[littlejim]

I got interference when I ran two, a Lowrance x-91 and an Interphase Echo 220. This showed as 'rabbits feet' acroos the screen of the Echo 220 and the Lowrance turning its sensitivity down until it read nothing.
However when this topic has come up before it turns out that some bods are running two together with no problems at all, lucky blighters.

recommend you give it a go and see what happens, try both on one side if that is convenient. Tell us what happens. You are going to be the expert on it as soon as you give it a go. I like the idea of a set up that doesn't mean even more holes in the back of the boat.