DIYbanter - depth sounder transducer cable repair

"freddyuk" wrote in message
...

I know you cannot splice transducer cable but if you needed to how is
the best way to reconnect the cables.Excepting some loss in accuracy i
just want to change the plug fitting.

Thanks

--
freddyuk

Where did you get the idea that you can't splice transducer cable? As long
as you make a good connection - like soldering the individual wires - there
is no issue other than the lack of waterproofness of that portion of the
cable. Also, if you leave a large area unshielded, and the unshielded
portion is close to a source of noise - the ignition system, for example -
you will pick up more noise. The signals you are dealing with are audio
frequencies (all right, VLF RF) - usually between 50 and 200 kHz. The length
of the cable makes little difference, as the speed of sound in water (what
the sounder is actually measuring) is around 4,814 feet per second at 60
degrees F. The speed of the signals in the cable is in the neighborhood of
687 million feet per second (speed of light in vac. * a guess of .7 VP for
the cable). A bunch of feet longer or shorter will not affect the accuracy,
as the timing doesn't change significantly. If you were to add enough cable,
it would reduce the sensitivity due to the attenuation of the transmit
pulse, and the received echo to and from the transducer.