Coax Cable

[James]

I am trying to determine the best coax cable to use from the coil to the control head. Any opinions on the subject welcome ? Best to all jim

[kt315]

Jim if i run search engine of this forum on 'cable' i see 4 pages of threads.
main problem of this forum is we can not unite similar threads in one - no such engine.
so new people are not able to find up what they are looking for.

[Koala]

Post 12 by Eric

http://www.geotech1.com/forums/showt...x+Cable+orange


If you are intending to use it around rocks or underwater.

[kt315]

post 12 by Eric

http://www.geotech1.com/forums/showt...n-coil-and-PCB

[SVEN1]

I have a source for the type of coax used by Eric. Instead of orange in color, its green.

RG58 POLY.pdf

[kt315]

Hi Sven,
The orange cable is a specially made RG58 coax. It is made for the offshore industry, specially for underwater use, with a polyurethane outer jacket rather
than pvc. This is much stronger and hard to penetrate by contact with sharp edges. Water at pressure would very quickly siphon along ordinary coax if there
was even a small cut, and enter the coil windings. Salt water would write off both the coil and the cable and even enter the electronics unless a water
blocking connector was used. Of course the orange coax is considerably more expensive, but I thought it was worth it as even for shallow water work it gives
added protection.
The cable I used is by JDR Cable Systems, part no. CAF9007. http://www.jdrglobal.com/
I haven't bought any for some years and although I can find the company on the internet, I can't find the product. Maybe it has been discontinued. The 58cu
by Ancor may be as good and it maybe worth while asking for a sample length. Both inner and outer conductors must be tin plated copper - the inner conductor
stranded, not solid.
Eric

[kt315]

an orange color cable on DEEPERS coil a type that i do not know.
this marked microphone low capacitance low inductance, Italy.

[SVEN1]

Hi Sven,
The orange cable is a specially made RG58 coax. It is made for the offshore industry, specially for underwater use, with a polyurethane outer jacket rather
than pvc. This is much stronger and hard to penetrate by contact with sharp edges. Water at pressure would very quickly siphon along ordinary coax if there
was even a small cut, and enter the coil windings. Salt water would write off both the coil and the cable and even enter the electronics unless a water
blocking connector was used. Of course the orange coax is considerably more expensive, but I thought it was worth it as even for shallow water work it gives
added protection.
The cable I used is by JDR Cable Systems, part no. CAF9007. http://www.jdrglobal.com/
I haven't bought any for some years and although I can find the company on the internet, I can't find the product. Maybe it has been discontinued. The 58cu
by Ancor may be as good and it maybe worth while asking for a sample length. Both inner and outer conductors must be tin plated copper - the inner conductor
stranded, not solid.
Eric

That's why I went looking for a polyurethane jacketed coax that came close to the one Eric used spec wise. The green coax (polyurethane jacket) I am using on all my land and water builds works great. And fairly flexible unlike many coax cables. I have used a number of Marine brand coax cables Ancor etc. but, they have a PVC jacket. Full specs on the Green poly. coax is detailed in the pdf in my above post.

[Koala]

Got to admit it's amazing how freely this information is. Not long ago you have to find this out through trial and error. Imagine traveling a hundred miles to the beach and searching the shallows for water to enter the cable. Fairly obvious now it's been pointed out but I bet it took hundred of hours and a few fails before polyurethane became the choice.

Well done Eric for sharing.