Joining Radar Cable

[Kurrawong_Kid]

In a moment of unthought through madness I cut the cable of my JRC 1500 radar to allow more easy unstepping of the mast, without the need to feed the cable out behind the linings etc. Does anyone know of a suitable plug and socket to which I can reconnect the wires, yet feed through an Index Marine type gland? There appear to be 11 wires including the coaxial screen. I've looked at the R.C. website which has some possibilities and the Maplin which appears less promising. What have other owners done? Many thanks in anticipation.

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[Robin]

If the cable is long enough, join it below decks in a waterproof box with simple terminal block connector.

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[claudio]

Preferably a metal box, possibly die cast aluminium in order that the signals remain screened. Don't forget to connect the screens together and to the box itself.



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[Heckler]

dont panic, mine was cut and joined in the headlining thru a simple chocolate box connector, a std water tight gland thru the deck, and connect it inside, no need for fancy boxes and screening, and it works fine
stu

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[Strathglass]

To join the coax get one male and one female BNC coax commectyors from Maplin or Index. The coax carries a video/digital signal and it is better if the correct impedence connectors are used. Those will either be 50 or 75 ohm.
This can be determined be ihe type of coax used in the existing harness. There will be a number like UR67 printed on the outside of this cable. Once you have found this then, using google, you should be able to find the impedance, allowing you to buy the correct connectors.
The remainder of the wires are less critical and you can choose whatever way suits you to join them.

The sealed waterproof box inside, that has been sugested, sounds a good idea.

Iain

The best way to pass the wires through the deck is to use a stainless inverted swan neck. This tends to be easier to waterproof than connectors directly on the deck.

I dont have the problem of passing wires through the deck as all my wiring exits the mast 6" below the deck and there is a dam inside the mast just above deck level.


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[tom52]

Just an ordinary block connector behind the head liner will work OK, but tin the ends of the wires first

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[Birdseye]

asked jrc this question when my new radar arrived with 10m too much cable. they told me that it was ok to join with a chocolate block in a watertight box, and this has worked fine, even after being disconnected and re-connected every season when the mast comes down. take care to connect the shielding as well as the wires. and i wrap the whole lots in cooking foil prior to putting in the sealed box (obviously taking care to make sure nothing shorts out.).

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[sailorman]

Kurrawong Kid
i think the forum should be told "EXACTLY" HOW SHORT IT IS.
i belive "micro surgery" may be req.
roger

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[Kurrawong_Kid]

Sailorman, as you know my wife can prescribe specs for the microsurgery and unless I've been drinking with you or swigging the Bismark, I've a steady hand for the soldering, but whether this bright spark can sort out all the shielding from shorting only time will tell.
Many thanks for all the advice you folks. Alan

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