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Pbraffitt - Thru Hull for DSM250 on HS2390 Vector

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Pbraffitt - Thru Hull for DSM250 on HS2390 Vector

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Old 01-07-2004, 11:56 AM
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Default Pbraffitt - Thru Hull for DSM250 on HS2390 Vector

I just installed a DSM250 that feeds both a Raymarine L760 and a RL70C. Please recommend a thru-hull transducer that will provide excellent bottom fishing resolution for offshore in both 50 and 200 freq's. Installation will be on a HydraSport 2390 Vector.
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Old 01-07-2004, 12:15 PM
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Default Pbraffitt - Thru Hull for DSM250 on HS2390 Vector

Reel here is a link to several Thread's on the very same issue !!!!...John
http://thehulltruth.com/6/ubb.x?a=tp...1&m=7076095435
http://thehulltruth.com/6/ubb.x?a=tp...1&m=4606091535
http://thehulltruth.com/6/ubb.x?a=tp...1&m=1416039435

Bottom line if you have room the B260 or B256.... is the item your looking for ...Peter will clear this up .....John


Triton 2200CC, Honda BF200,
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Old 01-08-2004, 12:45 PM
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Default Pbraffitt - Thru Hull for DSM250 on HS2390 Vector

jtburf, thanks for the help.

Reel'em, I would encourage you to check those links and if you still have questions let me know. As a rule of thumb the B256 is a great performer for most applications. If you want the best and the most information your sounder can produce than the B260 is for you. With either model make sure you use a High Performance fairing.

Peter Braffitt
Business Development Manager
AIRMAR Technology Corp.
Milford, NH USA
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Old 01-08-2004, 10:02 PM
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Default Pbraffitt - Thru Hull for DSM250 on HS2390 Vector

Thanks for the replies. When I orginally purchased the boat, I had the Raytheon L755RC installed with a P65 transom mount. Now that I've upgraded to DSM250 driving both the L760 and RL70C, I am wondering if I am getting maximum results with the P65. Most of my fishing is in less than 300ft off the central Florida east coast, and I am targeting ledges and wrecks for bottom fishing. Occasionally, I fish the Keys in waters approaching 1000ft. My first question is what is the difference in performance between the P65, B256 and B260 in these applications? My second question is how do I prevent the P65 from kicking up during normal operation? It appears to kick up when I come down hard off a wave. I've been advised to secure the sensor to the bracket by installing a screw and nut through the bottom of the sensor and bracket. Will the screw affect the sensor in this location?
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Old 01-09-2004, 12:29 PM
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Default Pbraffitt - Thru Hull for DSM250 on HS2390 Vector

The B256 averages 16 times more sensitivity than a P65, and the B260 over 50 times. I hope that doesn't make the P65 sound less than capable because the P55, P65 and P66 all use the same ceramic and compare very close to each other. They are great choices for many applications. For serious deep-water performance though the B256 and B260 are substantially more sensitive. Now the key you mention is that you want to fish ledge, or at least identify ledge and structure for bottom fishing. In this case the B260 is the clear leader. It has a narrow beam that can easily discriminate between fine changes in bottom structure as well as show targets closely. The beam has low side lobes so the sound energy is mostly sent straight down to the intended target where in some cases the B256 can tend to "blend" fine details.

The P65 kick-up sounds like it is receiving a little more pressure on the face of the transducer than it can handle. This could be from being too deep in the water or maybe due to the specific hull design. I have heard of people adding a screw to the bottom of the transducer but keep in mind you will lose the protection factor of the transducer being able to release if it sees too much force. The next result would most likely be breakage. I would suggest trying a bead of silicone on the mating surface of the transducer to the bracket. This should increase the kick-up point by a margin, without giving it up all together. The best part is that it is not an alteration to the transducer so you can always go back.

Peter Braffitt
Business Development Manager
AIRMAR Technology Corp.
Milford, NH USA
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Old 01-12-2004, 03:32 AM
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Default Pbraffitt - Thru Hull for DSM250 on HS2390 Vector

Peter - I've decided to upgrade to the B260 thru-hull, high speed fairing and diplexer. Can these components be purchased at the Miami Boat Show, and can you recommend an installer in Orlando, Florida? BTW, I added a retaining screw to the bottom of the P65 for use until I make the upgrade.
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Old 01-12-2004, 10:56 AM
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Default Pbraffitt - Thru Hull for DSM250 on HS2390 Vector

Most vendors at the Miami show do not carry inventory as far as I know. I would suggest asking the group who they have had good installation experience with and go with that reccomendation. Many people who sell the products also install them so you may find the best deal on a package from one vendor. The B260 will have the diplexer built into it, but do make sure you get the High Performance fairing.

Incidentally, I will be in Miami supporting our customers but we do not have a booth there. I will be floating around the electronics pavilion most of the first few days of the show so if you have questions stop into the sounder manufacturer's booths and ask, they will probably be able to locate us.

Peter Braffitt
Business Development Manager
AIRMAR Technology Corp.
Milford, NH USA
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