Author Topic: Transducer placement, alignment?  (Read 22012 times)

0 Members and 1 Guest are viewing this topic.

Offline mike fish

  • Full Member
  • ***
  • Joined: Aug 2012
  • Location: mn
  • Posts: 110
  • Unit(s): 798ci HD SI, 899, 999, 999
Transducer placement, alignment?
« on: September 01, 2014, 01:40:08 PM »
HB gives instructions on how to install your transducer on your boat. Is the object of these to get the transducer level with the lake bottom or water line when boat is in water?
Reason for asking is my 2D readings haven't been the best and I spent some more time again last week playing with settings and am now wondering if transducer isn't quite installed right.
I took a level with yesterday to check it on the water and it no where near level. How critical is this measurement?

Help? Input?


Offline bobcoy

  • Sr. Member
  • ****
  • Joined: Sep 2011
  • Location: arkansas
  • Posts: 286
  • Unit(s): 1197 & 1198
  • Software: 6.640 & 7.670
  • Accessories: iPilot-Link,GRHA GPS-HS,ETH 5PS
Re: Transducer placement, alignment?
« Reply #1 on: September 01, 2014, 03:22:26 PM »
Keep in mind you are leaning over the back and the boat is probably farther down in the back than normal. Yes it is important to be fairly level both side to side as well as front to back. Bob

Offline Beaulieu80

  • Full Member
  • ***
  • Joined: Apr 2014
  • Location: Canada, Chicoutimi
  • Posts: 177
  • Unit(s): 798CXI HD SI COMBO
  • Software: 7.68
Re: Transducer placement, alignment?
« Reply #2 on: September 02, 2014, 10:02:14 AM »
I have posted few pics on the Gallery tab of the website. I use a braket that allows me to adjust the postion. took me many hours to figure the best position of my 798 unit.

Offline mike fish

  • Full Member
  • ***
  • Joined: Aug 2012
  • Location: mn
  • Posts: 110
  • Unit(s): 798ci HD SI, 899, 999, 999
Re: Transducer placement, alignment?
« Reply #3 on: September 02, 2014, 11:37:14 AM »
bobcoy, yep I tried to take into account for leaning of boat by repositioning people.

Beaulieu80, Does your bracket just go up and down? Did you find you had to change the level or angle of your ducer also from factory recommendations?  How is that 7.12 software working for you?

Offline bobcoy

  • Sr. Member
  • ****
  • Joined: Sep 2011
  • Location: arkansas
  • Posts: 286
  • Unit(s): 1197 & 1198
  • Software: 6.640 & 7.670
  • Accessories: iPilot-Link,GRHA GPS-HS,ETH 5PS
Re: Transducer placement, alignment?
« Reply #4 on: September 02, 2014, 01:34:59 PM »
Mike, I have installed a dozen transom tranducers with very few problems. With my boat on the trailer, I put the transducer level(side to side) with my waterline.(unless you have polished it recently you can see where the waterline is. For the depth I mount so the center point(the glue line on most) is even with the bottom of the transom. I pitch the transducer slightly down in the back. Usually one position or about 5 degrees lower than the front. The position on the hull is also important. You do not want rivets or anything else in front of the transducer that will create bubbles under the transducer. Each boat is slightly different and small tweeks may still be needed to optimize for sett-up in your case. A couple pic's might give people here a clue or two for you. Bob

Offline sfw1960

  • Bringer Of The 'Bird
  • Sr. Member
  • ****
  • Joined: Jul 2010
  • Location: White Cloud , MI
  • Posts: 422
    • http://www.michigan-sportsman.com/forum/member.php?u=3330
  • Unit(s): H10MSI G2N-H10MDI G2N-H12SI-H12MSI G2N
  • Software: v1.840 x 3, v1.830
  • Accessories: AS GPS HS x2, I-Pilot Link, RC-1, RC-2
Re: Transducer placement, alignment?
« Reply #5 on: September 02, 2014, 03:47:23 PM »
Well said!

Offline mike fish

  • Full Member
  • ***
  • Joined: Aug 2012
  • Location: mn
  • Posts: 110
  • Unit(s): 798ci HD SI, 899, 999, 999
Re: Transducer placement, alignment?
« Reply #6 on: September 02, 2014, 04:48:11 PM »
I expect it to be level side to side, it's the front to back that is in question. I see fish on my flasher on the bowmount TM. I'm talking about either sitting still or trolling with TM not at cruising speed. This is the first time I've had the boat out in a while so of course right away my wheels are turning as to whats going on here still. I had spent quite a bit of time pushing buttons on head unit, even found Doug's video on my phone and watched that too in the boat to make sure I wasn't missing anything. Hence why I'm thinking the ducer isn't where it should be which may answer why the left SI goes dark while travelling in marina canel.
If I get a chance later I'll take a picture.

Offline newkid4si

  • Hero Member
  • *****
  • Joined: Mar 2010
  • Location: Meadville PA. 16335
  • Posts: 832
  • Unit(s): 998c si
  • Software: v 5.70
Re: Transducer placement, alignment?
« Reply #7 on: September 02, 2014, 11:22:11 PM »
   mike fish

          The one thing that has improved my 2D readings, especially at speed, is to tip the back end of the transducer down slightly.
          I'm using the large ( XHS 9 HDSI 180T ) transducer and would guess that it's about 1/4" below level at the back.

          Here is a link to an old post that shows a bracket that I built in which I can control the X,Y + Z axis. 

                    http://forums.sideimagingsoft.com/index.php?topic=4764.msg29554;topicseen#new    About 1/2 way down.

                        Mike

Offline mike fish

  • Full Member
  • ***
  • Joined: Aug 2012
  • Location: mn
  • Posts: 110
  • Unit(s): 798ci HD SI, 899, 999, 999
Re: Transducer placement, alignment?
« Reply #8 on: September 03, 2014, 01:24:45 AM »
newkid4si, creative thinking there!  What do you find for front to back, level or tilt for better readings?


Offline sfw1960

  • Bringer Of The 'Bird
  • Sr. Member
  • ****
  • Joined: Jul 2010
  • Location: White Cloud , MI
  • Posts: 422
    • http://www.michigan-sportsman.com/forum/member.php?u=3330
  • Unit(s): H10MSI G2N-H10MDI G2N-H12SI-H12MSI G2N
  • Software: v1.840 x 3, v1.830
  • Accessories: AS GPS HS x2, I-Pilot Link, RC-1, RC-2
Re: Transducer placement, alignment?
« Reply #9 on: September 03, 2014, 03:45:25 AM »
That looks tilted too far down in back. That seam should be CLOSE to parallel with the hull.

Offline bobcoy

  • Sr. Member
  • ****
  • Joined: Sep 2011
  • Location: arkansas
  • Posts: 286
  • Unit(s): 1197 & 1198
  • Software: 6.640 & 7.670
  • Accessories: iPilot-Link,GRHA GPS-HS,ETH 5PS
Re: Transducer placement, alignment?
« Reply #10 on: September 03, 2014, 06:45:23 AM »
I am not sure what they call that outer section of hull but I think you will need to move the ducer more to the center of the transom. I think that would cause turbulence where it is now. It looks like there was one mounted to the left of that section of strakes. That looks like the place to go.

Offline mike fish

  • Full Member
  • ***
  • Joined: Aug 2012
  • Location: mn
  • Posts: 110
  • Unit(s): 798ci HD SI, 899, 999, 999
Re: Transducer placement, alignment?
« Reply #11 on: September 03, 2014, 10:54:02 AM »
I agree that it looks tilted down too far too. This is where the transom angle chart said to place it.

If I move it closer to motor it is under 15" or the plate on transom wouldn't let mounting bracket lay flat. This was the best spot without putting on a plastic mounting board at the time.

What kind of plastic mounting board is that and where do you buy it?

Offline sfw1960

  • Bringer Of The 'Bird
  • Sr. Member
  • ****
  • Joined: Jul 2010
  • Location: White Cloud , MI
  • Posts: 422
    • http://www.michigan-sportsman.com/forum/member.php?u=3330
  • Unit(s): H10MSI G2N-H10MDI G2N-H12SI-H12MSI G2N
  • Software: v1.840 x 3, v1.830
  • Accessories: AS GPS HS x2, I-Pilot Link, RC-1, RC-2
Re: Transducer placement, alignment?
« Reply #12 on: September 03, 2014, 11:05:53 AM »
The material is HDPE ("Starboard") - Cabela's has it, BPS, Gander - some even use a cuttin board if you can find a thick one

Offline newkid4si

  • Hero Member
  • *****
  • Joined: Mar 2010
  • Location: Meadville PA. 16335
  • Posts: 832
  • Unit(s): 998c si
  • Software: v 5.70
Re: Transducer placement, alignment?
« Reply #13 on: September 03, 2014, 10:13:58 PM »
mike fish

       Remember that I am using the larger transducer. Using the seam on the side of the transducer as a level reference, I would say that
       that back is 1/4" lower that the front. With your unit, I'm guessing it won't be that much.
       I notice in your photos that there are many rivets directly in front of your current mounting. This will create air bubbles and poor water flow
       over the face of the transducer. Both of which you want to avoid. I would try as others have suggested moving more toward the center of the boat.
       I centered mine between two strakes.

                   Mike

       

Offline sfw1960

  • Bringer Of The 'Bird
  • Sr. Member
  • ****
  • Joined: Jul 2010
  • Location: White Cloud , MI
  • Posts: 422
    • http://www.michigan-sportsman.com/forum/member.php?u=3330
  • Unit(s): H10MSI G2N-H10MDI G2N-H12SI-H12MSI G2N
  • Software: v1.840 x 3, v1.830
  • Accessories: AS GPS HS x2, I-Pilot Link, RC-1, RC-2
Re: Transducer placement, alignment?
« Reply #14 on: September 03, 2014, 10:36:46 PM »
Yep, the "old rules" sure don't apply much any more huh New???  ;)

Offline mike fish

  • Full Member
  • ***
  • Joined: Aug 2012
  • Location: mn
  • Posts: 110
  • Unit(s): 798ci HD SI, 899, 999, 999
Re: Transducer placement, alignment?
« Reply #15 on: September 04, 2014, 01:26:11 AM »
Unfortunately there is no way avoiding rivets, the whole back edge is double riveted.  Spacing is 20". It was the closest I could go because of rigde on transom as you can see the bracket next to TD mount.

I have another thought behind the mounting plate.  Do you suppose if I beveled the bottom leading edge of board it would help to smooth out some of the turbulence from the rivets?

I'm going to pickup a board in the next 2 days.
« Last Edit: September 04, 2014, 01:28:55 AM by mike fish »

Offline sfw1960

  • Bringer Of The 'Bird
  • Sr. Member
  • ****
  • Joined: Jul 2010
  • Location: White Cloud , MI
  • Posts: 422
    • http://www.michigan-sportsman.com/forum/member.php?u=3330
  • Unit(s): H10MSI G2N-H10MDI G2N-H12SI-H12MSI G2N
  • Software: v1.840 x 3, v1.830
  • Accessories: AS GPS HS x2, I-Pilot Link, RC-1, RC-2
Re: Transducer placement, alignment?
« Reply #16 on: September 04, 2014, 03:54:26 AM »
You don't want any rows leading to it - my hull has double rivets @ the back & I top out around 27MPH, no issues.
You can try using a caulk or something like that @ those rivets to smooth it out a bit - but you want a clear shot down the length.
Your motor will block an SI beam if not trimmed up.
Some guys with a jack plate have even mounted right below the motor.

Offline Beaulieu80

  • Full Member
  • ***
  • Joined: Apr 2014
  • Location: Canada, Chicoutimi
  • Posts: 177
  • Unit(s): 798CXI HD SI COMBO
  • Software: 7.68
Re: Transducer placement, alignment?
« Reply #17 on: September 04, 2014, 02:39:50 PM »
my bracket can go up and down yes and you can adjust the angle with the xducer screw

http://www.cabelas.com/product/Boating/Marine-Electronics/Sonar-Accessories|/pc/104794380/c/104707080/sc/104587380/Portable-Transducer-Bracket/699847.uts?destination=%2Fcatalog%2Fbrowse%2Fsonar-accessories%2F_%2FN-1100523%2FNs-CATEGORY_SEQ_104587380%3FWTz_l%3DSBC%253BMMcat104794380%253Bcat104707080&WTz_l=SBC%3BMMcat104794380%3Bcat104707080%3Bcat104587380
« Last Edit: September 04, 2014, 02:42:06 PM by Beaulieu80 »

Offline mike fish

  • Full Member
  • ***
  • Joined: Aug 2012
  • Location: mn
  • Posts: 110
  • Unit(s): 798ci HD SI, 899, 999, 999
Re: Transducer placement, alignment?
« Reply #18 on: September 05, 2014, 12:46:01 PM »
My plan for Sat. is to just make a couple of adjustments. 1-level out ducer, 2- update to 7.020 and see what happens. If still not satisfied I'll mount the plastic board and relocate ducer closer to motor and try again Sunday. My concern with board is will that extra 3/4" thickness cause a problem with SI on left side? Currently the motor doesn't block the SI view.
 Does anybody know where the SI and 2D sonars are located inside the compact ducer? Ex; 2D in front or back? How is SI positioned?
Has any of the updates corrected the 83/200hz problem yet?
Also I'll have to give myself a refresher on how to update and be able to go back to original software.

Thanks

Offline bobcoy

  • Sr. Member
  • ****
  • Joined: Sep 2011
  • Location: arkansas
  • Posts: 286
  • Unit(s): 1197 & 1198
  • Software: 6.640 & 7.670
  • Accessories: iPilot-Link,GRHA GPS-HS,ETH 5PS
Re: Transducer placement, alignment?
« Reply #19 on: September 05, 2014, 01:21:47 PM »
Your motor is and will be reflecting signal and blocking signal to some extent. Also by moving it closer to the motor may actually affect the si beam less because the area of reflection and blockage will be reduced as the beam is a bit narrower the closer it is. Good luck with your quest. Bob

Offline mike fish

  • Full Member
  • ***
  • Joined: Aug 2012
  • Location: mn
  • Posts: 110
  • Unit(s): 798ci HD SI, 899, 999, 999
Re: Transducer placement, alignment?
« Reply #20 on: September 05, 2014, 06:05:14 PM »
It must not be blocking it much I don't seem to notice any change whether if the motor is up or down.

Quest. I like that word too. Sometimes words like mission and adventure get used also.

Offline rnvinc

  • Hero Member
  • *****
  • Joined: Nov 2009
  • Location: Western KY
  • Posts: 4329
  • Unit(s): 1197c SI Combo, SOLIX G2 MSI
  • Software: Dependent on whim
  • Accessories: AS GRHA, MEGA 360, LowBird LSS 1 & 2
Re: Transducer placement, alignment?
« Reply #21 on: September 06, 2014, 12:22:23 AM »
My plan for Sat. is to just make a couple of adjustments. 1-level out ducer, 2- update to 7.020 and see what happens. If still not satisfied I'll mount the plastic board and relocate ducer closer to motor and try again Sunday. My concern with board is will that extra 3/4" thickness cause a problem with SI on left side? Currently the motor doesn't block the SI view.
 Does anybody know where the SI and 2D sonars are located inside the compact ducer? Ex; 2D in front or back? How is SI positioned?
Has any of the updates corrected the 83/200hz problem yet?
Also I'll have to give myself a refresher on how to update and be able to go back to original software.

Thanks


Here's an X-ray of the HDSI showing the round disk 2d piezo in front  center....and the long thin SI piezoes on either side the full length of the housing...

I would assume the Compact SI xducer's piezoes are situated similar...



Rickie

Offline mike fish

  • Full Member
  • ***
  • Joined: Aug 2012
  • Location: mn
  • Posts: 110
  • Unit(s): 798ci HD SI, 899, 999, 999
Re: Transducer placement, alignment?
« Reply #22 on: September 06, 2014, 12:36:53 AM »
Thanks Rickie that helps to put a mental picture of piezoes.

Offline mike fish

  • Full Member
  • ***
  • Joined: Aug 2012
  • Location: mn
  • Posts: 110
  • Unit(s): 798ci HD SI, 899, 999, 999
Re: Transducer placement, alignment?
« Reply #23 on: September 06, 2014, 01:00:51 AM »
Do I need to contact HB to get software updates older than whats listed 7.120?  I'm not running I pilot,autocharts, etc.  It looks to me like  6.60 or 6.68 would work for me? Is there any update #'s I'm missing in between current and 6.60?

Offline rnvinc

  • Hero Member
  • *****
  • Joined: Nov 2009
  • Location: Western KY
  • Posts: 4329
  • Unit(s): 1197c SI Combo, SOLIX G2 MSI
  • Software: Dependent on whim
  • Accessories: AS GRHA, MEGA 360, LowBird LSS 1 & 2
Re: Transducer placement, alignment?
« Reply #24 on: September 06, 2014, 06:55:32 AM »
Most of the versions for any of the units are here...(except for some of the newest)...

http://forums.sideimagingsoft.com/index.php?action=downloads

Rickie
« Last Edit: September 06, 2014, 07:03:17 AM by rnvinc »

Offline mike fish

  • Full Member
  • ***
  • Joined: Aug 2012
  • Location: mn
  • Posts: 110
  • Unit(s): 798ci HD SI, 899, 999, 999
Re: Transducer placement, alignment?
« Reply #25 on: September 06, 2014, 10:32:39 AM »
Most current update contains everything that was in previous updates also? Correct?

Offline rnvinc

  • Hero Member
  • *****
  • Joined: Nov 2009
  • Location: Western KY
  • Posts: 4329
  • Unit(s): 1197c SI Combo, SOLIX G2 MSI
  • Software: Dependent on whim
  • Accessories: AS GRHA, MEGA 360, LowBird LSS 1 & 2
Re: Transducer placement, alignment?
« Reply #26 on: September 06, 2014, 10:56:58 AM »
Most current update contains everything that was in previous updates also? Correct?

Correct ...

Rickie

Offline Humminbird_Greg

  • Humminbird Helper
  • Humminbird Staff
  • *
  • Joined: Mar 2009
  • Location: Eufaula, AL.
  • Posts: 6546
  • I help because I can
    • Humminbird Web Site
Re: Transducer placement, alignment?
« Reply #27 on: September 09, 2014, 11:26:51 AM »
mike fish,
There have been a lot of good suggestions here so far but… what exactly is the problem with the 2D sonar?  I wouldn’t want you to go through all of this trouble for something that isn’t going to help.  Can you post a few Screen Snapshots of what the problem is?
Greg Walters at Humminbird
gwalters@johnsonoutdoors.com

Offline mike fish

  • Full Member
  • ***
  • Joined: Aug 2012
  • Location: mn
  • Posts: 110
  • Unit(s): 798ci HD SI, 899, 999, 999
Re: Transducer placement, alignment?
« Reply #28 on: September 09, 2014, 10:58:28 PM »
It doesn't mark fish well.  Turn up the sensivity higher and now there is so much clutter you can't distinguish whats on screen. Same results if your using max or clear mode. I talked with HB CRC today to see which updates addressed 83/200 issue and if I could just get that update. She said they are still working on the fix. I thought one of the past updates addressed the 2D sonar issue but it doesn't sound like it or I can't seem to find the info. I'm still running 6.25.
I didn't get out on Sat because plans got changed and it was getting close to dark when time became available.

Offline mike fish

  • Full Member
  • ***
  • Joined: Aug 2012
  • Location: mn
  • Posts: 110
  • Unit(s): 798ci HD SI, 899, 999, 999
Re: Transducer placement, alignment?
« Reply #29 on: September 10, 2014, 02:09:57 AM »
Here are some examples.

Offline rnvinc

  • Hero Member
  • *****
  • Joined: Nov 2009
  • Location: Western KY
  • Posts: 4329
  • Unit(s): 1197c SI Combo, SOLIX G2 MSI
  • Software: Dependent on whim
  • Accessories: AS GRHA, MEGA 360, LowBird LSS 1 & 2
Re: Transducer placement, alignment?
« Reply #30 on: September 10, 2014, 08:23:47 AM »
What Chart Speed are the 2d images taken with...??

Faster Chart Speed will assign more pixels to the echoes...(in 2d images)...

And it looks like the xducer is not level front to back ...the 3rd image is consistently only showing the very 1st segment of the fish arch...

Rickie
« Last Edit: September 10, 2014, 08:27:13 AM by rnvinc »

Offline mike fish

  • Full Member
  • ***
  • Joined: Aug 2012
  • Location: mn
  • Posts: 110
  • Unit(s): 798ci HD SI, 899, 999, 999
Re: Transducer placement, alignment?
« Reply #31 on: September 10, 2014, 09:37:52 AM »
I'd guess it was 4 or 5 because I thought it was suppose to be a little over boat speed. I just cranked it up to 10 for the first time 2 weeks ago after watching DV's video and didn't notice much change.

Offline sfw1960

  • Bringer Of The 'Bird
  • Sr. Member
  • ****
  • Joined: Jul 2010
  • Location: White Cloud , MI
  • Posts: 422
    • http://www.michigan-sportsman.com/forum/member.php?u=3330
  • Unit(s): H10MSI G2N-H10MDI G2N-H12SI-H12MSI G2N
  • Software: v1.840 x 3, v1.830
  • Accessories: AS GPS HS x2, I-Pilot Link, RC-1, RC-2
Re: Transducer placement, alignment?
« Reply #32 on: September 10, 2014, 10:14:03 AM »
The  processing power of a 798 isn't very much compared to the bigger machines, I usually ran speed 8-10 on mine and I agree with Rickie - going back to what I said in regards to the angle - when the boat is IN the water, your angle has NOTHING to do with how it sits on the trailer.....
I generally put a straight edge on the hull bottom and checking the housing seam against that I will kick the back edge down just a little bit - if the boat is heavy in the back - your angle will need to change - nothing a wet arm & sleeve won't adjust a bit!!   >:D
« Last Edit: September 10, 2014, 10:17:15 AM by sfw1960 »

Offline mike fish

  • Full Member
  • ***
  • Joined: Aug 2012
  • Location: mn
  • Posts: 110
  • Unit(s): 798ci HD SI, 899, 999, 999
Re: Transducer placement, alignment?
« Reply #33 on: September 10, 2014, 10:57:54 AM »
I didn't know processing power was less on 798, I'll put it back up to a higher speed rate.
Yes that's what I'm getting at about the angle. That's why I took a level with to check angle with boat on the water. I think or feel the boat is rear heavy. I did change angle but haven't been out yet to retest. I had to actually move the cog position, 1 notch to get to my reference mark from on water level testing. I'll tell you what it sure looks goofy in reference to the hull but I'm going to trust what the level said and try it. This is the first I've changed ducer mounting. Reason for change is I asked myself okay what have I not tried yet. I've definetly pushed a lot of buttons on head unit.

Offline sfw1960

  • Bringer Of The 'Bird
  • Sr. Member
  • ****
  • Joined: Jul 2010
  • Location: White Cloud , MI
  • Posts: 422
    • http://www.michigan-sportsman.com/forum/member.php?u=3330
  • Unit(s): H10MSI G2N-H10MDI G2N-H12SI-H12MSI G2N
  • Software: v1.840 x 3, v1.830
  • Accessories: AS GPS HS x2, I-Pilot Link, RC-1, RC-2
Re: Transducer placement, alignment?
« Reply #34 on: September 10, 2014, 12:16:42 PM »
I've install a BUNCH of compact side imaging xdcrs, and I ALWAYS use a hunk of mounting plate - because you usually have to tinker with it a little bit on your best guess.

G'Luck!

Offline Humminbird_Greg

  • Humminbird Helper
  • Humminbird Staff
  • *
  • Joined: Mar 2009
  • Location: Eufaula, AL.
  • Posts: 6546
  • I help because I can
    • Humminbird Web Site
Re: Transducer placement, alignment?
« Reply #35 on: September 10, 2014, 12:45:53 PM »
mike fish,
The angle of the transducer would not keep the unit from showing sonar returns from fish.  It may show them as only a part of an arch (like the third pic above) but they will still be there.

I don’t see anything abnormal about the first two images.

The third does show that the back end of the transducer is too low due to all of the sonar returns showing the leading edge of an arch and that is all.  Sometimes having the back end of the transducer this low is the only way to get water depth readings on some boats at higher boat speeds, especially on aluminum boats.  Looking back at your install pics I see the rivets and wonder if you are getting air bubble across the transducer which will affect the overall sensitivity of the sonar, yet not so many air bubbles that the unit cannot track the bottom.  I wonder this due to the thickness of the zero like which may be indicating a heavy surface clutter line (in your case due to air bubbles off the hull).  This would clear up if you shut the motor off and drifted, which is a good way to check for this.

Low power to the unit can also cause low sensitivity problems.  Check the electrical connections to the 798 unit and make sure none are loose or corroded.

Another possible added benefit with using a mounting plate is that it will move the transducer back away from the edge of the hull and possibly out of any air bubbles that are causing problems with water depth readings at higher boat speeds or with lowered sonar sensitivity.
Greg Walters at Humminbird
gwalters@johnsonoutdoors.com

Offline mike fish

  • Full Member
  • ***
  • Joined: Aug 2012
  • Location: mn
  • Posts: 110
  • Unit(s): 798ci HD SI, 899, 999, 999
Re: Transducer placement, alignment?
« Reply #36 on: September 11, 2014, 11:07:28 AM »
Almost all my shots are taking drifting or trolling. Would going slow still create that much turbulence to cause a problem? Would you still get turbulence drifting?  Yes those rivet heads are large in my opinion, it's an old boat so I suppose they heavy dutied the transom rivets. The rivets on in-laws boat aren't even close in size but it is also a smaller, lighter boat.
Mounting plate. If it is turbulence from rivets do you think mounting plate would help to tame this down? Or a bead of silicone across rivets would probably prove same thing?
Surface clutter does seem to increase exponentially with each number increase. I usually have it on 1 or 2 because anything moere and your losing so much of water column.
What setting would be expected for Fish ID sensitivity? What are some of you other guys using for a setting?

Thanks

Offline Humminbird_Greg

  • Humminbird Helper
  • Humminbird Staff
  • *
  • Joined: Mar 2009
  • Location: Eufaula, AL.
  • Posts: 6546
  • I help because I can
    • Humminbird Web Site
Re: Transducer placement, alignment?
« Reply #37 on: September 12, 2014, 09:52:25 AM »
Going slow could still cause turbulence but drifting should not.  There isn't some sort of bait tank outlet to the left of the transducer is there?
Yes, a mounting plate or anything that pushes the transducer back farther from the boat's hull can possibly help because it gives the air bubbles a chance to float upwards and out of the way of the transducer.  I helped someone once who put a piece of 4X4 on his transom and mounted the transducer to that (it was the only thing we had at the time) and it worked great!
I don't know how well the silicone would work because you would not be able to get it perfectly smooth, which would just cause smaller air bubbles.
Greg Walters at Humminbird
gwalters@johnsonoutdoors.com

Offline mike fish

  • Full Member
  • ***
  • Joined: Aug 2012
  • Location: mn
  • Posts: 110
  • Unit(s): 798ci HD SI, 899, 999, 999
Re: Transducer placement, alignment?
« Reply #38 on: September 16, 2014, 11:47:15 AM »
Update: Finally got out yesterday. TD in "level to lake bottom position" caused left SI to hit motor. Went back factory mount. Scroll speed does refresh screen quicker. Observation of turbulence seems to be the most at the "vee" and the least at flat spot on outer edge of hull. I'm hesisatent to move TD closer to center of boat right now. I siliconed rivets last night. Didn't update to 7.120 yesterday because I only want to make 1 change at a time. Will probably try that today when I'm out there.

Other thing I noticed last night when viewing shots on computer, was majority of my shots from yesterday are more pixelated[not bad but noticeable] then from previous shots last year.  What can cause a this change?
 Also what's the cause of diagonal lines from top to bottom again?
 Thanks

Offline Humminbird_Greg

  • Humminbird Helper
  • Humminbird Staff
  • *
  • Joined: Mar 2009
  • Location: Eufaula, AL.
  • Posts: 6546
  • I help because I can
    • Humminbird Web Site
Re: Transducer placement, alignment?
« Reply #39 on: September 16, 2014, 01:00:07 PM »
Diagonal lines on the 2D sonar, are they going from lower left to upper right or opposite?  If lower left to upper right than I say they are fish…,  :-[ uh fish “air”.  Air bubbles as they float towards the surface of the water.
Greg Walters at Humminbird
gwalters@johnsonoutdoors.com

Offline mike fish

  • Full Member
  • ***
  • Joined: Aug 2012
  • Location: mn
  • Posts: 110
  • Unit(s): 798ci HD SI, 899, 999, 999
Re: Transducer placement, alignment?
« Reply #40 on: September 28, 2014, 05:51:31 PM »
Update: So last time out I updated to 7.120. I found I didn't like it because it was more pixelated than 6.25. I didn't notice much difference in SI or DI that I could see. I ended up going back to 6.25 because the 2D sonar pixels were better.


Share me

Digg  Facebook  SlashDot  Delicious  Technorati  Twitter  Google  Yahoo

 

Related Topics

  Subject / Started by Replies Last post
2 Replies
5117 Views
Last post June 20, 2010, 07:38:02 AM
by IRC Kevin
1 Replies
3856 Views
Last post April 03, 2012, 09:47:31 AM
by sonar2000
4 Replies
4515 Views
Last post May 04, 2012, 01:25:37 PM
by Weekend Warrior
1 Replies
15327 Views
Last post June 01, 2012, 12:07:47 AM
by Brian37075
1 Replies
2122 Views
Last post May 27, 2012, 03:20:24 PM
by ITGEEK
5 Replies
6681 Views
Last post August 16, 2012, 03:38:08 PM
by Humminbird_Greg
8 Replies
7936 Views
Last post November 21, 2013, 07:54:40 AM
by freezerfiller
17 Replies
12681 Views
Last post July 13, 2014, 03:56:55 PM
by squam


SimplePortal 2.3.3 © 2008-2010, SimplePortal