I see about 8 sonar bounces on cajunslo's jackplate and on groutscouts sonar about 6 multiple sonar bounces inside his jackplate and both jackplates echos show the jackplates measure just about the same size and the ducer is mounted about the same distances from the opening of the jackplate. ..... So very similar setups. Rather than a speed change, I see groutscouts unit likely changed its sonar strength or filtering automatically as he moved from one depth to a different depth and the jackplate echoes changed in visibility as the depths changed.
Both units can be helped with 1) a holeshot plate or 2) by taking out of auto you can hide most of the echo problemBut will be likely giving up some of the capability and optimum performance.

Jason, My last screen shot the sidescan and downscan were in manual. I did change scanning range a couple of times but this did not help with the lines.

I recieved a call from Scap today, he is working with me and sent me pictures to take measurments. He said he will fix my problem with another L-Bracket and will build me a hole shot plate if that dosn't work, either way he attitude was 100% customer satisfaction and fixing the problem !!!

After talking to him on the phone I know now why so many recommended him.

cajunslo

I think Scap has you on the right track.

My team partner and I had the same problem on his Skeeter. Our solution was to place the transducer mid-way between the two jack plate sides as low as we could get it. (Yea, I know; we all hate to drill holes in the transom but he chose to do that rather than install a hole-shot plate.)

Bottom line, this move solved his interference problems.

I think you are right all the way, I first thought my ducer was higher but after looking closer it's about the same as Cajuns (except mines inside the jackplate which must be why I have less lines). Never sped up since I was in a idle only area. How in the world does the ducer shoot up into the jackplate? Does this little bit of interference really bother anything? All I care about is whats on bottom.

While the Structurescan or Si sonar may be designed to shoot out to the sides and listen for echos coming only from 180 degrees below the plane, the signals are a wave pattern and energy leaks above the intended plane and the echos as well reflect energy back to the transducer.

The" little bit of jackplate interference" represents a significant amount of energy and signal. False echos appear to especially affect the unit's digital filtering and also the "auto" settings needed to optimize the intended details in the signal display. "Auto" is important and needs to work if you are not constantly fiddling with the controls.

The hole shot plate will reflect most of the pinged burst of errant energy away from the transducer and eliminate signals bouncing back and forth on the interior walls of the jacplate.

Thanks, so I need a holeshot plate for the best results/performance . Any idea how much they run? Yeah, yeah, I know I could google it but that'd be too easy.

About $60 bucks

Hey G/S...I wonder if we can find someone locally to make one. I need one too!!

O.K so does anybody around San Antonio know who works with aluminum? I asked my dealer here (Boerne Marine) about them once and they were clueless.

try noribilt its a car shop but they do aluminum fab
http://sanantonioimports.com/forumdisplay.php?f=230

Ive got a place closer that Im going to call...it might be cheaper to buy one of the net.

Just added a 2nd HDS-5 with structure scan and used the network cable.

My front HDS-5 reads the structure scan transducer mounted on the transome very nicely. How do I keep the structure scan networked and read the sonar transducer from the head of my Terrova trolling motor into the front HDS-5? The Terrova is equiped with US2 and is hooked up. For some reason it wants to read the sonar transducer located on my transom.

just go into your menu's and uncheck net work sonar, on of your units.

Any idea where you find that menu at?

See if this helps.
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Sharing Transducers temps.

HDS settings when using Network Sonar

Network sonar enables Multiple HDS units to share a single sonar source, or to change all units in the network from source to source. There are a few settings that need to be changed so that network sonar does not change where the unit is looking for its sonar overlay data (depth/temperature). With network sonar enabled you are only able to display one set of sonar data at a time, if you wish to show the depths and temperatures from different transducers network sonar must be turned off. *Running two transducers at the same time can cause cross talk interference.
There are two ways to network HDS units and use Network Sonar:
� Ethernet only: Allows sonar data to be shared only while network sonar is enabled. When network sonar is enabled on both units you will only be able to use one sonar source (data from one transducer) at a time.
� Ethernet and NMEA2000: Allows sonar data to be shared via network sonar. Also allows sonar overlay data to be shared via NMEA2000 network when network sonar is disabled. (Can show temp from one unit on another)
To enable/disable Network Sonar:
Menu>Menu>Sonar>Network sonar. (This dot must be highlighted in both units before network sonar will function. To disable it only has to be turned off on one of the two units.)


Setting the Temp and Depth source:
Setting the temp and depth source will allow the unit to display the active sonar data while network sonar is enabled and to display its own data when network sonar is disabled.
Menu>Menu>Network>Data sources�>Sonar>Water temperature>Menu>Scope>Local
Then set the active source as HDS-# Sonar [This Device]
This must be performed on at least one of the two HDS in a network; it can be done to both.
Follow the same procedure for Depth.

Data Source Selection menu when networked with Ethernet and NMEA2000.


Data Source Selection menu when networked with only Ethernet.