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Author Topic:   Cutting Transducer Cable

rkong posted 02-04-2003 09:33 PM ET (US)
Has anyone done this while installing a fish finder? The reason I ask is that my new FF has a plug about 1 inch wide attached to the end of the cable. And pulling this through the tunnel has turned out to not be easy. I keep getting stuck. I'm wondering if I could just cut the cable and reattach it once I've pulled it through.
Thanks.
seasicknes posted 02-04-2003 09:44 PM ET (US)
Cutting the plug on the transducer cable is not recommendended.
triblet posted 02-04-2003 10:34 PM ET (US)
It's a bad idea to cut the cable.
Taper things from fish to plug with electical
tape. A connical shale will be easier to
pull through than a blunt shape. But first
pull the fish out and push it back. Maybe it
will find a new hole.
Also, you can tell where in the tunnel it's
hanging up, and maybe you can figure out what
it's hanging on and wiggle that. Say the
gas hose on a Montauk comes into the tunnel
about half way.

Chuck
bsmotril posted 02-04-2003 11:11 PM ET (US)
While making the pull, have a couple of friends put tension on each end of the cables/hoses already in the tunnel. A lot of times, that will do the trick by pulling in their slack and leaving room at the top of the tunnel for the new cable to get through.
BillS
Jerry Townsend posted 02-04-2003 11:27 PM ET (US)
DON'T cut any transducer cable (fish finders, GPS) as those systems require a strict impedance match to work properly. The antenna on a fixed mount VHF radio can be cut as desired as the antenna can/must be matched for acceptable/optimum performance. ---- Jerry/Idaho
triblet posted 02-04-2003 11:59 PM ET (US)
I asked Garmin about cutting the cable to the
antenna on my GPSMAP 162, and they said no
problem functionally if it was done well, but
it would void the the warantee because they
had no way to guarantee the quality of the
work. Since I had about 20' of coax, and
needed about 4', I whacked it off and put one
of the good Shakespere CenterPin BNC connectors
on, and if anything, the signals are
stronger (less wire).
Cable length is much more important at the
longer wave lengths (lower frequencies). I
thought that was due to standing waves
(resonances) rather than impedance (but I
found analog EE real hard. Digital was easy.)

Chuck
rkong posted 02-05-2003 12:33 PM ET (US)
Thanks for the advice! I successfully got it through with lots of wiggling and moving the other wires.

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Author	Topic: Cutting Transducer Cable
rkong	posted 02-04-2003 09:33 PM ET (US) Has anyone done this while installing a fish finder? The reason I ask is that my new FF has a plug about 1 inch wide attached to the end of the cable. And pulling this through the tunnel has turned out to not be easy. I keep getting stuck. I'm wondering if I could just cut the cable and reattach it once I've pulled it through. Thanks.
seasicknes	posted 02-04-2003 09:44 PM ET (US) Cutting the plug on the transducer cable is not recommendended.
triblet	posted 02-04-2003 10:34 PM ET (US) It's a bad idea to cut the cable. Taper things from fish to plug with electical tape. A connical shale will be easier to pull through than a blunt shape. But first pull the fish out and push it back. Maybe it will find a new hole. Also, you can tell where in the tunnel it's hanging up, and maybe you can figure out what it's hanging on and wiggle that. Say the gas hose on a Montauk comes into the tunnel about half way. Chuck
bsmotril	posted 02-04-2003 11:11 PM ET (US) While making the pull, have a couple of friends put tension on each end of the cables/hoses already in the tunnel. A lot of times, that will do the trick by pulling in their slack and leaving room at the top of the tunnel for the new cable to get through. BillS
Jerry Townsend	posted 02-04-2003 11:27 PM ET (US) DON'T cut any transducer cable (fish finders, GPS) as those systems require a strict impedance match to work properly. The antenna on a fixed mount VHF radio can be cut as desired as the antenna can/must be matched for acceptable/optimum performance. ---- Jerry/Idaho
triblet	posted 02-04-2003 11:59 PM ET (US) I asked Garmin about cutting the cable to the antenna on my GPSMAP 162, and they said no problem functionally if it was done well, but it would void the the warantee because they had no way to guarantee the quality of the work. Since I had about 20' of coax, and needed about 4', I whacked it off and put one of the good Shakespere CenterPin BNC connectors on, and if anything, the signals are stronger (less wire). Cable length is much more important at the longer wave lengths (lower frequencies). I thought that was due to standing waves (resonances) rather than impedance (but I found analog EE real hard. Digital was easy.) Chuck
rkong	posted 02-05-2003 12:33 PM ET (US) Thanks for the advice! I successfully got it through with lots of wiggling and moving the other wires.