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Jon, I noticed a typo in my email reply... The cable can be cut so as to avoid having to send this plug-in cable connection (at this cable's end) thru the smaller thru hull connection. (If this hull fitting is made to pass but this single interface cable as a whole.) It would then be reconnected once within the submarine as I have done. Don't want to confuse anyone... David Bartsch > Date: Thu, 18 Mar 2010 12:23:27 -0400 > From: jonw@psubs.org > To: personal_submersibles@psubs.org > Subject: [PSUBS-MAILIST] Interphase Vista > > > Nice work David! > > I have a couple questions about the repair, and a couple comments about > the device. In regards to the repair, can you provide more detail on > what the problem was as well as the solution. Your description did not > say what you did with the shielding of the individual nine wires. Some > photos would speak volumes here. As I understand it, the "cable" > consists of nine individual wires. Eight wires are both insulated and > shielded. The ninth wire is bare. All wires were cut, including the > shielding. You reconnected all the insulated wires with in-line crimps > (I assume you mean a solderless butt connector), and you reconnected the > non-insulated wire with a butt-connector. How then did you handle the > foil shielding for each individual wire? > > Jon > > > > David Bartsch wrote: > > 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. 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