Transducer Question

puck is for sonar , the one on the jack plate is di and si and temp. there is a y cable that keeps the outside one from sending sonar. the di , si has sonar when plugged straight to the unit.

Typically while you are running on plane, you will only get signal from the thru hull transducer.

Sonar is 2D and can read at faster speeds. DI is 3D and you will lose signal while on plane. AndyGreene Boat & MotorAndy Greene Greene Boat & Motor 828-286-2290 http://www.greeneboats.com

mark thompson wrote:puck is for sonar , the one on the jack plate is di and si and temp. there is a y cable that keeps the outside one from sending sonar. the di , si has sonar when plugged straight to the unit.I only have the side imaging/DI transducer for my Humminbird 1198, I do not have a thru hull transducer for on-plane readings. I want to add the other transducer though. I was thinking there is an A/B switch that had to be used with the “Y” cable and this switch allowed you to select which transducer you are using at any given time. Am I wrong? Is all I need the “Y” cable and the thru hull transducer?Jim EbarbMany, LA (Toledo Bend Lake)2004 Cougar/ 225 OptimaxHumminbird Helix 12 Chirp SI on BalzOut Mount at bowLowrance HDS 7 at bowHumminbird Helix 12 Mega SI on Ram Mount at ConsoleLowrance HDS 8 in dash at console

The hummingbird side-imaging units do have down-imaging (at least mine do, I’ve had a 598 a 798 and an 898) but they use the side-imaging crystals for it, they don’t have a dedicated down-imaging crystal—it’s basically a down-view of the side-imaging sonar readout. At any rate, the side-imaging ducer is an expensive object that collects weeds and slows your boat down, adds holes to your hull, etc, so most people I know mount it above the step on the transom by attaching it to the jackplate—this protects it, allows it to give good side-imaging readout at low speeds(which is the only speed it works anyway, more or less when idling)—but the whole transducer is out of the water when the boat is on plane. Even if you were to attach to the hull low enough for the ducer to stay in the water when on plane, the water is turbulent-enough there that you often don’t get a good readout at speed or you disrupt the water going to the prop, etc. The transducer in the bilge sits right over the smoothest water and gives a better 2d sonar view at higher speeds and it’s protected inside the bilge where it wont hit anything or collect weeds. There are something like 4 or 5 pin connections on the transducer cable for one of these units—one is for 2d sonar, one is for temp, one is for the left-side side image, one for the right-side side-image, etc. the “y-cable” basically is a splitter so the 2d signal goes to the puck in the bilge, while the side-imaging, temp, etc goes to the side imaging ducer on the jackplate—essentially you have 2 transducers but the unit “thinks” it only has one transducer, so there is no need to toggle back and forth—they function as one transducer as far the head-unit on the transducer is concerned.

It depends on how concerned you are about the absolute greatest accuracy. There was very recently a discussion on this angle over on BBC. The people at TSS say that the offset angle that is already on the TSS will be fairly accurate for most boats. I wonder about that myself. The vid in this thread is excellent, but does the mount without a TSS, so is adjustable. Once a TSS is mounted, you do not have the option of adjustability, so it should be right the first time. http://www.bbcboards.net/showthread.php?t=688319

Thanks to all for the infoOne more quick question, since I am mounting to the side of the Jack plate should I drill 90 percent through and tap the holes or all the way and thru bolt with lock nuts?Treat everyday like it might be the last