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| Do you guys have any pics or any insight to how and where the best place is for the puck on an 1890? Thanks for the help!! |
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Posts: 1040
Location: Stevens Point, WI | Zach,
Here are a couple pics from Zboudreau. If you also got back towards the first three pages, there are a few other pics from guys also.
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 1890ducer2.jpg (100KB - 225 downloads)
Transducer1.jpg (101KB - 212 downloads)
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Member
Posts: 64
| I don't think that is an SI puck? Looks like a Lowrance puck. |
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Posts: 1040
Location: Stevens Point, WI | I understand that Zach, however, puck placement is going to be relevant with any other kind of transducer. |
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Posts: 30
| Merckid - 2/21/2008 3:11 PM
I understand that Zach, however, puck placement is going to be relevant with any other kind of transducer.
As I understand it most people don't mount the SI transducer that way because of its size. Most people use a regular dual beam skimmer or shoot thru-hull for high speed and mount the SI up from the waterline so it's out of the water (protected) at high speed. Humminbird has a switch for switching between transducers. I've heard they also have a Y-cable now.
On the 1890 I would mount it similar to the pictures Merckid posted but up an inch or two so it doesn't contact the water at high speed and I would mount it a little closer to the centerline of the transom so that a second high speed skimmer transducer wouldn't interfere with the Side-Imaging. It would also be protected from damage when loading on the trailer.
This site has pictures...
http://groups.yahoo.com/group/sideimaging/
Cheers,
Bob
Edited by bobski 2/21/2008 8:39 PM
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| because it's shooting more to the side than the tight cones of traditional transducers, there are actually special requirements for the Humminbird SI units.
• The Side Imaging transducer must NOT have anything
obstructing the ‘view’ of the side looking beams, i.e.
nothing can be in the line of sight of these beams (not a
hull, motor, or other transducer, etc).
NOTE: You may need to tilt the motor up and out of the way when
using the side looking beams.
• In order for the side beams to be displayed accurately, the
transducer must be mounted so that it is looking straight
down in the water when the boat is in the water.
per the pics in the manual, the shot that TJ posted above should still be about right, assuming you don't have a kicker motor or transom electric. just make sure the areas left and right of the puck are clear of obstruction. the manual suggests mounting it somewhat closer to the motor, and inside any other transducers on the transom.
i hadn't thought of splitting transducers like bobski suggests...good idea!
Edited by lambeau 2/21/2008 8:42 PM
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Member
Posts: 30
| The SI transducer is fairly large and can kick up some spray at high speed. Also because of its size high speed tends to move the transducer so it is no longer aimed downward but out at an angle.
Here are some good pictures... you'll probably need to register to see them but it's free. Lot's of good info.
http://ph.groups.yahoo.com/group/sideimaging/photos/browse/c3cf
Bob |
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Member
Posts: 1991
| I went with the thru hull and the transom on my SI unit |
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Member
Posts: 64
| Sorry merc, I didn't mean to insult you. And thanks to all for the help. I think we are going to go with 2 ducers. |
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Member
Posts: 3899
| lambeau - 2/21/2008 8:39 PM
because it's shooting more to the side than the tight cones of traditional transducers, there are actually special requirements for the Humminbird SI units.
• The Side Imaging transducer must NOT have anything
obstructing the ‘view’ of the side looking beams, i.e.
nothing can be in the line of sight of these beams (not a
hull, motor, or other transducer, etc).
NOTE: You may need to tilt the motor up and out of the way when
using the side looking beams.
• In order for the side beams to be displayed accurately, the
transducer must be mounted so that it is looking straight
down in the water when the boat is in the water.
per the pics in the manual, the shot that TJ posted above should still be about right, assuming you don't have a kicker motor or transom electric. just make sure the areas left and right of the puck are clear of obstruction. the manual suggests mounting it somewhat closer to the motor, and inside any other transducers on the transom.
i hadn't thought of splitting transducers like bobski suggests...good idea!
Am considering the HBird for this year. How wide is the signal coming off the SI ducer? I would expect it to be fairly narrow out to the side of the boat, so that a kicker or big motor shouldn't interfere. Is the SI only for when going slower speeds, and not up on the pad? If so, what about mounting it above the pad, dead center, so that it is out of the water when up on the pad? Using two ducers, as described?
The problem I would have with that big ducer is it could have an affect on how the boat planes. I had that big Lowrance deal, and that made the boat lean away from it while on plane. Acted as a foil on that side of the boat. |
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| Am considering the HBird for this year. How wide is the signal coming off the SI ducer? I would expect it to be fairly narrow out to the side of the boat, so that a kicker or big motor shouldn't interfere. Is the SI only for when going slower speeds, and not up on the pad? If so, what about mounting it above the pad, dead center, so that it is out of the water when up on the pad? Using two ducers, as described?
The problem I would have with that big ducer is it could have an affect on how the boat planes. I had that big Lowrance deal, and that made the boat lean away from it while on plane. Acted as a foil on that side of the boat.
the ducer has both the side imaging, and the standard sonar features built in, so you can definitely use it as an all-in-one. of course, that makes for a relatively big transducer. a splitter with a switch between two would be one way around the potential issues people described.
depending on which SI transducer you get, it has the standard dual-freq of 20 degrees/200kHz, and 74/83kHz (or 60/83kHz).
the SI portion is either 84 or 86 degrees/455kHz...out to both sides. this is VERY close to straight out to the side/straight down (which would be 90 degrees), so yes, i can see how it could easily get interference from the main motor/kicker/transom electric, etc.
it is a narrow band, as you thought, which is probably why the manual suggest trimming up the motors a bit to get it them of the way when using the SI.
here's a picture of the cone overlays:
http://www.humminbird.com/leading_innovation/humminbird-sonar/side-...
Edited by lambeau 2/22/2008 11:47 AM
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