Thanks David! You've got to love the expertise and volunteer
help available on this list.
I don't much care for the idea of cable-squeeze
through-hulls, and try to always use proper ones (e.g. Subconn or similar).
I'm not aware of any nine-conductor penetrators with individually shielded
conductors. For a small fortune, the penetrator companies will surely make you
anything, but I'm not sure my shallow depths justify the small
fortune. Since this is just for a shallow-diving K-250 and the cable
itself is high quality, I'm thinking I could feed the cable through a hole of
the same diameter and permanently bond the outside of the cable jacket.
Not an approach I'd suggest for a deeper diving boat, but the
extruding force given my cable diameter and depth works out at around 13
lbs.
Are the crimp connections you installed disconnectable? Else I
can cut the cable again and attempt to replicate what you've just done
after feeding it through a hole and potting.
thanks,
Alec
The contents of this e-mail are intended for the named addressee only. It contains information that may be confidential. Unless you are the named addressee or an authorized designee, you may not copy or use it, or disclose it to anyone else. If you received it in error please notify us immediately and then destroy it.
To all (and Alec),
The forward scanning
sonar is repaired and wow! I must have one of these things! This gives you the
ability to split screen the display to give a picture view of both the bottom
contour and a forward scan of what's ahead!
When not in the
split screen mode it shows the depth in large black lettering on the upper right
of the display.
I can see the bottom of the above ground pool
very well and when turned from side to side shows this narrowing of the
channel forward of the unit on the side with the side of pool closer to this
transmit head.
The sensitivity can be adjusted which would be
great in weed thick areas to diminish this soft return
item.
Selecting greater depths is but a push of a button
away. The selections are in easy to read menu selections. (for people who are
challenged like me)
It is very accurate and uses a lcd display
with the forward scan being updated from left to right with the speed controlled
by the depth selection. The deeper of course the slower this scan
rate.
Now to the meat of our
problem...
Each wire (of which there are nine) is wrapped in a
fine aluminum foil. As signals spike there way down the individual wires, any
extra emf produced by the wire that sends it is transferred to this foil. One of
the nine wires has no insulation on it and as these foil runs are physically
touching, this extra signal is channeled to this bare wire and in this way does
not go to the other wires within this cable.
To repair this
unit, I simply removed the thru hull provided and connected this original
transducer cable with itself using nine in-line crimps (no shielding). The thru
hull first installed had three feet of wire that although containing individual
wires was not shielded from cross talk. This is what clouded his display and
allowed for only bottom depth indications.
How does he
install this wire (we already know we can cut this cable to insert it perhaps as
an intact cable) thru the side of a submarine and ensure it is sealed against
leaks under water pressure? Is there a thru hull that can handle nine wires and
keep them from transferring emf one wire to another?
I MUST have such a unit! Lets get some idea's on this one as
this thing is nothing short of
awesome!
David Bartsch
Hotmail: Trusted email with powerful SPAM protection. Sign up now.