Side Scan Cable junctions

[k2thiago]

Hy everyone!

Anyone know a manufacturer that produces some kind of junction that we can use to merge two edgtech's kevlar cables? We need to perform a survey in 150 m of depth and we have 3 cables of 100m. What do you thing about it? Can we do that?

Thanks

[NSWwrecks]

We did a DIY option for of joining two cables through a potted Stainless Steel junction with the below a bit of a mash up of what we did on our Klein 595 cable

Basically we made it from a 2” sch 10 Stainless pipe with 3mm ends welded onto with holes for the cable entry. It then the top milled down to allow it to be filled with urethane.
The urethane was a two part Flexane 80 http://www.devcon.com/products/produ...%2080%20Liquid

Additionally we used 2 Kellums/Hubbell grips part # 044201353 to terminate the main .500” (14mm) tow cable to the junction It goes through a .750” (19mm) hole in the junction and the grip is 28-1/2” (730mm) long.

The main thing to remember is all of the weight is transferred through the junction this is done via 3 different mechanisms 1) the Kevlar core of the cable in the potted central part, 2) the "flange" of the grip transferring load to the grip & 3) how the grip closes and grips the cable) of these 3 mechanisms I would suggest that the Kevlar core is the most important (Kevlar has almost no stretch) Thus it is significant issue is how the Kevlar is terminated inside the junction box

The images below are a mix of ours on this junction box and some of Mark M’s cable terminations on a bottom termination (connected to fish junction box) to give an indication of how we did it.

[IMG]http://nswwrecks.info/images/Cable%20splice.jpg[/IMG]

[IMG]http://nswwrecks.info/images/Cable%2...%20kellums.jpg[/IMG]

[IMG]http://nswwrecks.info/images/image001.jpg[/IMG]

[IMG]http://nswwrecks.info/images/image002.jpg[/IMG]

[Rüdiger]

Hi k2

The tightness of the junctions is probably the smallest problem. The problem is the tensile strength of the connection points. Google for the manufacturer of your cable and ask what they recommend for repairs.

mvh
Rüdiger

[geosonar]

Hi,

What Edgetech system are you using?

it is going to be difficult to get your fish down to that depth with Kevlar cable no mater how long it is. The drag on the cable will be more than the weight of the fish.

I have combined cables by terminating them and securing them together with 2 yale grips (don't forget a service loop) Another way would be to just plice the cables together with a water proof splice kit and again use 2 yale grips to hold the cables together.

The best solution would be to use double armored cable and a depressor of some kind.

Regards,

Rob

[geosonar]

If you are going to splice the cables together you should use a 3M splice kit. I think the model 82-F2 will work depending on the cable diameter.
You will also need something to hold the cables together as the Kevlar strength member will be cut.

You could use Yale lace on grips to hold the cables together or just purchase a 100m long tow cable from Edgetech which is the safe thing to do.