Author Topic: Interfacing a HB with the Lowrance LSS-2.  (Read 70069 times)

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Offline LWinchester2

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Re: Interfacing a HB with the Lowrance LSS-2.
« Reply #50 on: February 13, 2013, 05:08:33 PM »
Thanks Rickard

Rickard,

I found it quite interesting that your Lowrance pinouts were different than I got from Lowrance Tech Support.   I'm sure yours are correct or what you've been doing wouldn't work at all.  I'm curious how you determined which was plus and which was minus.   I have a project using the DI element and all I know is that it's on Pins 1 and 7.  Is it just trial and error to determine which is ground?  Is there any chance of harm to the unit or transducer if these are reversed? 

Thanks.
Leonard


Offline Rickard

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Re: Interfacing a HB with the Lowrance LSS-2.
« Reply #51 on: February 13, 2013, 07:53:13 PM »
Hi Leonard,
 
That's interesting, did they give you the complete pin layout? My method was measuring resistance and capacitance plus trial and error. Minus or plus doesn't seem to matter in the sonar circuits so I may use grounds in a way different from what Lowrance intended. One must always assume the unit can be damaged in such experiments. My unit has survived many short circuits and other rather dramatic events, though.
 
Rickard

Offline LWinchester2

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Re: Interfacing a HB with the Lowrance LSS-2.
« Reply #52 on: February 16, 2013, 10:55:34 PM »
They did but I have my doubts that it is correct.  Here is what they gave me.
1  grd       
2  left +   
3  left -   
4  down  -   
5  down +   
6  right +   
7  right  -   
8  temp     
9  xducer id

Some of these errors are irrelevant as the separate grounds become common, and you are not using the DI.  I would like read your take on this on how it compares with your experience.

Offline Rickard

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Re: Interfacing a HB with the Lowrance LSS-2.
« Reply #53 on: February 17, 2013, 02:37:50 PM »
Hi,
 
I think the list fits well to what I found. The only new thing is "xducer id" on pin #9. I don't know how they have arranged with this identity circuit, but it acts like an extra ground circuit in my application. I have tested with connecting - and + pins to ground and see no difference in performance. There should be slight differences in the beam to beam interference patterns (the stripes close the middle in the SI images). These patterns are weak the way I use the transducer (omitting DI) so there are no practical differences between the various ways one can connect - and + in the SI circuits.
 
Rickard

Offline rnvinc

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Re: Interfacing a HB with the Lowrance LSS-2.
« Reply #54 on: May 01, 2013, 04:01:39 PM »
I'm thinking about experimenting with this idea...

If I take the HB AS SIDB Y cable
( http://store.humminbird.com/products/322954/AS_SIDB_Y )....

And take the Lowrance 10EX-BLK
( http://www.boemarine.com/lowrance-10ex-blk-extension-cable-f-lss-1-or-lss-2-transducer/ )...

And remove the HDSI leg of the AS SIDB Y ....

And splice in the female end of the 10EX-BLK...

Will this give me a viable "plug and play" Y cable for connecting the HB Dual Beam (for depth) and the Lowrance LSS-2...??

(I'm hoping this scenario would allow me to use the LSS-2 without actually cutting off the cable end of the LSS-2...the 10EX-BLK is much cheaper to sacrifice than the LSS-2...)

Rickie
« Last Edit: May 01, 2013, 04:06:01 PM by rnvinc »

Offline Rickard

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Re: Interfacing a HB with the Lowrance LSS-2.
« Reply #55 on: May 01, 2013, 04:18:23 PM »
Hi,
 
Yes, it should work fine. Good luck!  :)
 
Rickard

Offline rnvinc

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Re: Interfacing a HB with the Lowrance LSS-2.
« Reply #56 on: May 01, 2013, 07:57:51 PM »
Is it also possible to splice the Temp pin so that the temp probe in the LSS-2 would function correctly on the HB screen..??

Rickie

Offline Rickard

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Re: Interfacing a HB with the Lowrance LSS-2.
« Reply #57 on: May 01, 2013, 10:52:29 PM »
The temp channel can be connected, but the reading will likely be wrong. The resistivity must be the same as in a HB transducer and the chance for that is very small. It could be worth trying, though.
 
Rickard
« Last Edit: May 02, 2013, 02:09:03 AM by Rickard »

Offline rnvinc

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Re: Interfacing a HB with the Lowrance LSS-2.
« Reply #58 on: June 27, 2013, 03:56:29 AM »
I'm about ready to start my project modifying the AS SIDB Y cable to have a Lowrance connector on the "Side Image" leg of the Y cable...

Is there any concensus on what should be done with the #9 pin that LWinchester2 indicated (in Reply #52 above) is labeled by Lowrance as "xducer id"...??

Rickie
« Last Edit: June 27, 2013, 03:58:16 AM by rnvinc »

Offline Rickard

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Re: Interfacing a HB with the Lowrance LSS-2.
« Reply #59 on: June 27, 2013, 06:21:56 AM »
Rickie,
I dont' know what the others have done with the "x-ducer id" pin, but I don't use it at all in my systems (I have two). There was no visible difference between using it, and omitting it so I think it's wise not using it.

Rickard

Offline kosmo

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Re: Interfacing a HB with the Lowrance LSS-2.
« Reply #60 on: June 27, 2013, 06:30:05 AM »
Richie your da ducer  going to look like a porkypine with all those transduducers on it.

Offline rnvinc

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Re: Interfacing a HB with the Lowrance LSS-2.
« Reply #61 on: June 27, 2013, 01:48:15 PM »
Richie your da ducer  going to look like a porkypine with all those transduducers on it.

You are quite correct about that kosmo....lol

I may have to stick my foot down in the water on the other side of the boat from all the xducer drag stickin down in the water on the right front of my bow..

Rickie

Offline rnvinc

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Re: Interfacing a HB with the Lowrance LSS-2.
« Reply #62 on: June 27, 2013, 01:50:53 PM »
Rickie,
I dont' know what the others have done with the "x-ducer id" pin, but I don't use it at all in my systems (I have two). There was no visible difference between using it, and omitting it so I think it's wise not using it.

Rickard

Thanks Rickard...

When I cut into the cables (AS SIDB Y cable and the Lowrance BLK-10 extension cable)...will I find shielding that I need to connect to ground/drain...??

Rickie

Offline Rickard

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Re: Interfacing a HB with the Lowrance LSS-2.
« Reply #63 on: June 27, 2013, 11:21:00 PM »
Rickie,
I have never cut any of those cables, but I bet they have shields, and if they have they should be connected to drain/ground as you suggest.
 
Rickard

Offline rnvinc

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Re: Interfacing a HB with the Lowrance LSS-2.
« Reply #64 on: June 28, 2013, 04:58:37 AM »
Rickie,
I have never cut any of those cables, but I bet they have shields, and if they have they should be connected to drain/ground as you suggest.
 
Rickard

Thanks Rickard...

I will post results when I get the setup ready..

(I'm still in process of testing the DI xducer setup and the rotated 60░ HDSI xducer setup...)

Rickie

Offline Rickard

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Re: Interfacing a HB with the Lowrance LSS-2.
« Reply #65 on: June 28, 2013, 07:38:45 AM »
Quote
(I'm still in process of testing the DI xducer setup and the rotated 60░ HDSI xducer setup...)

Just a thought, the LSS-2 should be possible to operate as a sideimaging AND a DI transducer with clever use of swiches (and probably some soldering too). I haven't thought this thru, but such a system would likely beat any solution with standard HB transducers (due to the length of the arrays inside the LSS-2). It may also beat the results when the LSS-2 is used with its "home system", a Lowrance, since (as far as I know) the L can't operate the SI and the DI channels separately. The result is issues with interference in the Ls.
 
Rickard

Offline rnvinc

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Re: Interfacing a HB with the Lowrance LSS-2.
« Reply #66 on: June 29, 2013, 08:04:04 AM »

Just a thought, the LSS-2 should be possible to operate as a sideimaging AND a DI transducer with clever use of swiches (and probably some soldering too). I haven't thought this thru, but such a system would likely beat any solution with standard HB transducers (due to the length of the arrays inside the LSS-2). It may also beat the results when the LSS-2 is used with its "home system", a Lowrance, since (as far as I know) the L can't operate the SI and the DI channels separately. The result is issues with interference in the Ls.
 
Rickard

I'm already working on it Rickard...

Just received the LSS-2 "skateboard" yesterday...

My initial setup will be utilizing 2 separate AS SI DB Y cables modified for use with the LSS-2...(the Y cable will be an easier modification than the actual xducer cables...cheaper too...)

*One Y cable will be modified to operate the LSS-2 Downscan element...thru the right SI channel in the 1197c SI...
*One Y cable will be modified to operate the LSS-2 Sidescan elements...similar to your breakthru tests of the LSS-2...

I feel this initial testing of separating the LSS-2 "Downscan" in a separate component setup from the LSS-2 "SideScan" will give better testing results so I don't have to worry about the DownScan elements causing anything weird while operating the SideScan elements ...and vice-versa...
 
If 1 is not connected (SideScan elements or DownScan element) ...then it shouldn't have any way to cause conflict while testing the other....(wire channels I can do...wave theory and sidelobes and nulls I am in kindergarden....lol)...

After I get "on the water" results of the 2 separate setups (SideScan - DownScan) using the LSS-2 with my 1197c SI....then I will think about convenience using switches or whatever...
 
Rickie
« Last Edit: June 29, 2013, 08:22:07 AM by rnvinc »

Offline offroad

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Re: Interfacing a HB with the Lowrance LSS-2.
« Reply #67 on: June 29, 2013, 02:06:17 PM »
"Been there done that " My 1197 works very well with the LSS2 Transducer  {With Rickards help } My down scan works fine. l shall post some snaps after l go out today for a fish

Offline rnvinc

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Re: Interfacing a HB with the Lowrance LSS-2.
« Reply #68 on: June 29, 2013, 02:56:46 PM »
"Been there done that " My 1197 works very well with the LSS2 Transducer  {With Rickards help } My down scan works fine. l shall post some snaps after l go out today for a fish

I would be very interested in seeing your wiring setup to get both the Side elements and the downscan element connected to the HB SI unit...

Rickie

Offline rnvinc

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Re: Interfacing a HB with the Lowrance LSS-2.
« Reply #69 on: June 29, 2013, 09:36:56 PM »
Offroad ...I sent you my email address...

Just curious...does your wiring configuration utilize the LSS 2 DownScan element or is your DI views in your SI unit still processed as composite blend from the SI elements...??

Rickie

Offline offroad

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Re: Interfacing a HB with the Lowrance LSS-2.
« Reply #70 on: June 30, 2013, 01:00:54 AM »
l think its the latter,as composite blend from the SI elements...

Offline rnvinc

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Re: Interfacing a HB with the Lowrance LSS-2.
« Reply #71 on: June 30, 2013, 08:01:36 AM »
l think its the latter,as composite blend from the SI elements...


The wiring diagram you sent by email shows the +DI pin going to the 200kHz in the HB...!?

Is this correct...??...(I can't wrap my head around this as to why)...

Is your HB unit obtaining depth from this center DownScan element of the LSS 2...??

Rickie
« Last Edit: June 30, 2013, 08:06:24 AM by rnvinc »

Offline offroad

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Re: Interfacing a HB with the Lowrance LSS-2.
« Reply #72 on: June 30, 2013, 08:21:45 AM »
That's what's been done. As to it being correct l have no clue. All l know is it works. Maybe l should explain more, Putting the wires together was a suck it and see exercise ..Red goes to green....nothing there... so lets try Red goes to red .... yep that works .

Offline abraquelebout

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Re: Interfacing a HB with the Lowrance LSS-2.
« Reply #73 on: June 30, 2013, 10:48:59 AM »
Hi Rickard
one year using towfish Lowbird (LSS2/HDSI) no problem
now i built a new side scan sonar, i think 60 m cat 7a ethernet cable, LSS2/hdsi
i have 8 wire in ethernet cable, i think using 2 wire connected at Down Lss2 wire, and use them with Y a second HDSI connector in one way left or right (455/800khz) and 200 khz too
What do you think about this ?
The down immage is product by an array at 455 khz and ducer at 200 khz ?

Offline rnvinc

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Re: Interfacing a HB with the Lowrance LSS-2.
« Reply #74 on: June 30, 2013, 11:03:19 AM »
That's what's been done. As to it being correct l have no clue. All l know is it works. Maybe l should explain more, Putting the wires together was a suck it and see exercise ..Red goes to green....nothing there... so lets try Red goes to red .... yep that works .

offroad....are using a second HB xducer (on the AS SIDB Y cable) with 200kHz for depth...??

Rickie
« Last Edit: June 30, 2013, 11:06:59 AM by rnvinc »

Offline offroad

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Re: Interfacing a HB with the Lowrance LSS-2.
« Reply #75 on: June 30, 2013, 11:50:44 AM »
Yes
its spliced in there as well

Offline Rickard

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Re: Interfacing a HB with the Lowrance LSS-2.
« Reply #76 on: June 30, 2013, 02:14:24 PM »
Quote
i think using 2 wire connected at Down Lss2 wire, and use them with Y a second HDSI connector in one way left or right (455/800khz) and 200 khz too

Yes, Abra, that should work. I have always been a bit annoyed by not having any use for the extra wire pair in the ethernet cables. The result will be a transducer cable that is split in a Y at the connector end. One connector is used when the system is operated in sidescan mode and the other is used in downscan mode. Of course, it would be convenient to have a switch for toggling between the modes, but I don't know if any of the available switches can do that.
 
The extra connection between the DI element and the 200 kHz circuit in Offroads system probably has no effect since the 455/800 kHz DI element in the LSS-2 can't oscillate at 200 kHz.
 
Rickard

Offline rnvinc

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Re: Interfacing a HB with the Lowrance LSS-2.
« Reply #77 on: June 30, 2013, 06:43:32 PM »

The extra connection between the DI element and the 200 kHz circuit in Offroads system probably has no effect since the 455/800 kHz DI element in the LSS-2 can't oscillate at 200 kHz.
 
Rickard

Thanks Rickard...

That makes sense....

Rickie

Offline abraquelebout

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Re: Interfacing a HB with the Lowrance LSS-2.
« Reply #78 on: July 01, 2013, 01:35:24 PM »
ok, i think testing the connection as i said on my next towfish >:D
now i built this, in few day i will publish the result.....
may be a good result at 800 khz in down scan ?


Offline peterv6i

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Re: Interfacing a HB with the Lowrance LSS-2.
« Reply #79 on: January 07, 2014, 06:49:29 AM »
LSS-2 is only for side scan?
If I install LSS-2 on HB i must cut off wires which goes to HB transducer?  (just for info)..

Is there on the marcet any other side scan transducer for 455/800Khz?

Offline Rickard

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Re: Interfacing a HB with the Lowrance LSS-2.
« Reply #80 on: January 07, 2014, 12:20:25 PM »
Hi,
 
If the transducers are hull mounted it's not neccessary to cut any cables. I use homemade wires to connect the LSS-2 and a Humminbird transducer to an extension cable. I use male and female pins from outdated printer cable connectors. The photo shows part of the setup I used this summer with no issues. The extension cable connector is hidden inside the tube to the left.
 
I saw a japanese fishfinder brand (forgot the name) affords a sidescan transducer that can be operated at 455 kHz, but the lenght is about the same as the Humminbird SI and HDSI transducers (and the Lowrance LSS-1) so the horizontal resolution is poor.
 
Rickard
 
 
 
« Last Edit: April 10, 2014, 06:06:02 AM by Rickard »

Offline peterv6i

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Re: Interfacing a HB with the Lowrance LSS-2.
« Reply #81 on: January 07, 2014, 12:43:14 PM »
So if I understand well... You have 2 side scan transducer connected at the same time? first one is humminbird and second one is LSS-2?

Also I have the question about resolution let's say that if you buy a smartphone with bigger screen size you have major resolution what about this LSS-2 transducer? If you confront it with humminbird? You get better image quality with LSS-2 than with original humminbird 455/800Khz transducer?

Offline Rickard

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Re: Interfacing a HB with the Lowrance LSS-2.
« Reply #82 on: January 07, 2014, 01:15:52 PM »
I did use a Humminbird SI transducers with an LSS-2 this summer just because the SI transducer was free at the time. But I only took the 2D downward signal from the Humminbird. All you need is a (any) transducer with 200kHz to measure depth.
 
The LSS-2 has better horizontal resolution because of its length, but this enhanced resolution is barely visible on the unit displays. But when recordings are shown with a 3rd party viewer in a computer it's easy to see the difference. Since I mainly use my unit for wreck searching the inspection of recordings is very important and I do all my scanning with an LSS-2.
 
Let's wait and see what the new Humminbird XNT-14-20-HDSI-T transducer can do (coming with the new ONIX models). Perhaps it will have better resolution than the SI and HDSI making all this risky transducer tweaking unneccessary?
 
Rickard

Offline Rotus623

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Re: Interfacing a HB with the Lowrance LSS-2.
« Reply #83 on: January 07, 2014, 08:46:08 PM »
I did use a Humminbird SI transducers with an LSS-2 this summer just because the SI transducer was free at the time. But I only took the 2D downward signal from the Humminbird. All you need is a (any) transducer with 200kHz to measure depth.
 
The LSS-2 has better horizontal resolution because of its length, but this enhanced resolution is barely visible on the unit displays.
 


Do you think that this is because the HB display was made to pair up with the HDSI transducer? Since the resolution of the HDS series is a little better do you think the LSS2 would look cleaner on it? Just curious. I haven't seen anyone split hairs so well, as yourself. :)

Offline peterv6i

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Re: Interfacing a HB with the Lowrance LSS-2.
« Reply #84 on: January 07, 2014, 11:13:38 PM »
Let's wait and see what the new Humminbird XNT-14-20-HDSI-T transducer can do (coming with the new ONIX models). Perhaps it will have better resolution than the SI and HDSI making all this risky transducer tweaking unneccessary?
 Rickard

A OK! Humminbird will have newer better "bigger" transducer? Are there some comparision between actual transducer 455/800 and XNT-14-20-HDSI-T?

I'am also interested in better image quality / datas (sotred on SD card as files). I'am also inspecting wreck's and sunken objects (pipes, rocks) in the sea (depth between 12-24m)..

Will be XNT-14-20-HDSI-T compatible with 998 and other si units?


« Last Edit: January 08, 2014, 12:24:31 AM by peterv6i »

Offline peterv6i

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Re: Interfacing a HB with the Lowrance LSS-2.
« Reply #85 on: January 08, 2014, 12:27:16 AM »
I did use a Humminbird SI transducers with an LSS-2 this summer just because the SI transducer was free at the time. But I only took the 2D downward signal from the Humminbird. All you need is a (any) transducer with 200kHz to measure depth.

clear.. downward signal from HB transducer (2 wires).. and SI signal from LSS-2..

Offline Rickard

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Re: Interfacing a HB with the Lowrance LSS-2.
« Reply #86 on: January 08, 2014, 01:15:52 AM »
Quote
Will be XNT-14-20-HDSI-T compatible with 998 and other si units?

They will probably say it's compatible only with the ONIX and maybe the ION models, but there use to be more options than specified. There are no comparisons with older transducers and the specs for the new transducer are incomplete and don't tell anything about dimensions and the horizontal beam width. Some vendors on the net present images and prices but those data are not reliable and the images are definitely from other and smaller transducers. We have to wait and see.
 
Rickard

Offline peterv6i

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Re: Interfacing a HB with the Lowrance LSS-2.
« Reply #87 on: January 08, 2014, 02:20:27 AM »

They will probably say it's compatible only with the ONIX and maybe the ION models, but there use to be more options than specified. There are no comparisons with older transducers and the specs for the new transducer are incomplete and don't tell anything about dimensions and the horizontal beam width. Some vendors on the net present images and prices but those data are not reliable and the images are definitely from other and smaller transducers. We have to wait and see.
 
Rickard

maybe all transducer which works on 455/800 Khz are compatible with HB/Lowrance.. Maybe HB will change only the connector shape ?! but this is not a problem.. ;)

Offline rnvinc

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Re: Interfacing a HB with the Lowrance LSS-2.
« Reply #88 on: January 08, 2014, 04:48:32 AM »
There are "unverified" reports this new XNT 14 20 HDSI T xducer is "digital"...

What little info I could dig up about "digital" xducers led me to this....
http://www.google.com/patents/US6667934

To say the XNT 14 20 HDSI T is anything compared to that patent is not known ...and is mere conjecture on my part...

If this new XNT 14 20 HDSI T xducer is constructed with circuitry in the xducer housing (similar to the patent noted above)....will it even possibly work with our xducer experiments...??

Rickie


Offline Rotus623

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Re: Interfacing a HB with the Lowrance LSS-2.
« Reply #89 on: January 23, 2014, 08:28:42 AM »
Hmmm, the old digital vs. analogue ordeal. I am a music enthusiast, and as most musicians know, the analogue sound of the vacuum tube is still sought after. 99% of musicians still perform live with a tube amp.

But, on the contrary, as far as visual appearance, digital is greatly superior to analogue. Compare the old tube tv's to the digital lcd screens.

I guess we will see how well the digital transducers do. Sound bandwidths sound infinitely better in an analogue format. I guess we will see how those digital soundwaves appear on a digital interface.......

Offline PT

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Re: Interfacing a HB with the Lowrance LSS-2.
« Reply #90 on: April 18, 2014, 11:29:08 PM »
Hello Rickard and Abra, I have been using (successfully) my 898 with 50 metres of Cat7 patch cable and manage to obtain a range of 80 metres either side of the transducer. After reading of your success, I have purchased a Lss2 transducer to build another towfish. In your opinion, what can the maximum length of the cable be to obtain the same sort of range as I have achieved with the original transducer? I was thinking of making it between 60 and 100 metres in length. I am after a clearer picture of the seabed in my search for shipwrecks and marine infrastructure sites.


Regards

Peter

Offline abraquelebout

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Re: Interfacing a HB with the Lowrance LSS-2.
« Reply #91 on: April 19, 2014, 03:34:47 AM »
Hi Peter
With my towfish i use 65 meters of cat7 cable, no problem, i can see fish, old structure (my new experiment is in lac of sanguinet, old structure of anciant built near jc ,age of steel, duggout, etc..)
the only problem is the 83 khz frequency who make a bat noise in picture, i publy pics in a next post.
the LSS 2 give a very good result.

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Re: Interfacing a HB with the Lowrance LSS-2.
« Reply #92 on: April 19, 2014, 07:54:18 AM »
Peter,
Abra has used longer cables than I have so his advice are more reliable. My longest cable is 50m plus about 10m with Humminbird extension. In the winter I use the 50m cable with a special ice-scanning gear and can scan very far, how far depends on the reflectivity of the target/sea floor, but I have got results at 100m range in favorable conditions. Even the LSS-2 has its limitations and the horizontal resolution use to be too poor for my needs at distances beyond 50m. Therefore, I use 50m as standard setting in ice-scanning and with a towfish. When scanning with a hull-mounted gear I use 50m or 70m as standard settings. Remember, unnecessary long rang setting will reduce ping rate and cause worse resolution.
 Rickard

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Re: Interfacing a HB with the Lowrance LSS-2.
« Reply #93 on: April 19, 2014, 08:53:14 AM »
scan at 120 m side, for a big wreeck, 60 m cable lss2 , prototype towfish n░ 2, the n░3 seem's better, i use it in 30 m depht for moment but if i can, i make scan with max range as soon as possibleila_rendered

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Re: Interfacing a HB with the Lowrance LSS-2.
« Reply #94 on: April 19, 2014, 09:12:33 PM »
I'd just like to say how much I appreciate the contributions from Rickard and Abra to this forum. I have learn't so much from their input over the years. I certainly wouldn't have had an affordable towed sidescan without this forum. It is amazing what it will detect as I have found a number of wreck, stranding and infrastructure sites using my Humminbird 797, and later 898. The only problem I find that out on the ocean, and in strong currents my lightweight unit suffers from heave, distorting the bottom signal to some degree. I am in the process of building a longer towfish with more weight and have fabricated a 40 kilogram depressor weight to get the fish down deep and hopefully take out some of the heave. The weight will be on a separate rope with the towfish tied off and trailing behind.
Attached are a couple of happy snaps from my fish. The Marilla was a clipper ship that was burnt and scuttled in Port Phillip Bay, it was refloated after two years but timber work, and iron concretions were left behind as a footprint. Also, a picture taken out in Bass Strait when we were searching for an old paddle steamer; no luck yet. But you can see the affect of the heave action as the swell passed under the search boat. The last is of the unit and fish itself.
Thanks again; I will go for a 70 metre cable.

Peter

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Re: Interfacing a HB with the Lowrance LSS-2.
« Reply #95 on: April 20, 2014, 01:31:55 AM »
hi PT
i test the independant lest there's 4 years, at this time whe work with seaspy magnetometer and the first prototype of towfish (80 m cÔble), whe make a hole around the towfish cable and ride on the lest cable, good result but when you turn, the lest sunk very fast and hit the ground.
now my definitive towfish is at 16 kg and i can put other lest in it, the nose cone goes out and whe put lest  on pipe.
for 50 to 70 m its good

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Re: Interfacing a HB with the Lowrance LSS-2.
« Reply #96 on: April 20, 2014, 02:17:36 AM »
Quote
I am in the process of building a longer towfish with more weight and have fabricated a 40 kilogram depressor weight to get the fish down deep and hopefully take out some of the heave. The weight will be on a separate rope with the towfish tied off and trailing behind.
I wonder about the combination with heavy depressor and heavy towfish. I think a heavy depressor should be combined with a near floating towfish that is trailed at least 10m behind the depressor. In fact, I can imagine a slightly floating towfish is optimal, because then you can make sure it travels a bit shallower than the depressor and you can even stop and let the depressor hit the sea floor while the towfish is safe. When a light towfish is used it will hang at the end of the horizontal towing line (between the depressor wire and the towfish) which means the effect of heave will be minimized. A heavy towfish will ride below the depressor and movements caused by heave may be carried over from the depressor wire to the towfish. It doesn't hurt if the towfish body is long, also.
 
This is what I think and what I have picked up from various sources. I have no practical experiance from such a system, though....
 
(I will, when time allows for it, test with adding floatation devices (a couple of stainless steel thermoses...?) to my heavy towfish to make it ride shallower, while keeping the benefits from its mass.)
 
Rickard

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Re: Interfacing a HB with the Lowrance LSS-2.
« Reply #97 on: April 22, 2014, 03:25:35 AM »
Thanks again Rickard and Abra; I will post the results of the trials when they are complete.

This is how I propose to run the fish deep (when I need too).


Regards

Peter

Offline abraquelebout

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Re: Interfacing a HB with the Lowrance LSS-2.
« Reply #98 on: April 23, 2014, 09:49:21 AM »
i do this system there's 4 years, it whork weel, the problem is 2 cable, and when the boat slow motion or turn, the ballast sunk verry fastly.
You can't sleep when you use this sytem. the avantage, if you give the ballast rope, the steel circle slide on the towfish cable and you can goes on more deep.
Whe use this system with a seaspy magnetometer too with verry good result.
i never use it again for towfish but it work.

Offline PT

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Re: Interfacing a HB with the Lowrance LSS-2.
« Reply #99 on: June 20, 2014, 04:47:05 PM »
Hello Rickard and Abra,

The LSS2 is still a work in progress, the techie that I use is having a few problems and would like to know the following:

The following things I have little experience with.

 

Lowrance LSS-2

 

If?

 

Pins 1 & 7 are looking Down

 

and

 

Pins 2 & 4 are Looking Left

 

and

 

Pins 8 & 9 are looking Right

 

and

 

Pins 5,6 & 10 are ground/screen

 

Pin 3 is Temperature, supposedly.

 

Most will have noticed that there are no pins left?

What pins does the return signal come back on?

 

and

 

also if there is a power (+12v) where can it be?



I am obviously missing something.

 

 

I assumed that it is similar in connection to the Humminbird Transducer

but of course this does not appear to be so?

 

The Humminbird receiver connections are with success previously to Humminbird Transducer for friend are:-

 

Transmit (tx)               pins 1& 2

Receive (rx)                 pins 3 & 4

Power (+12v)              pins 5 & 6

Earth/screen/common pin 7

Thanks

Peter




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