Depth transducer location?

matt_unique":11rq55dy said:
Is yours angled at all? I recall you have a higher powered transducer compared to mine (mine is a 600 w Airmar).
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Matt, the dealer installed the transducer and at the time I didn't know enough to know what questions to ask (such as this one.) I just have to assume that it was installed correctly.

My transducer is a 200 KHz R199. I think the factory had it left over from some project and they offered it to me as part of an incentive to buy the boat in November instead of at the SBS.

Warren
 
Per Sea wolf's request I put 3 pic's of my transducer sliding mount in my photo album "HIGH TIDE" p.2.

Also........I contacted Garmin about mounting transducers side by side.........NO if the freq. is the same. Others above have pointed that out. IE, two 200 freq. transducers side by side will screw both of them up.
 
In order to get good coverage of various depths you should have a 50/200kHz. I run mine with a split screen.
The 50kHz has a longer wave length and will read the deeper water better.
The 200kHz has a shorter wave length and will attenuate quicker- making it better at reading shallow water.

Roger
 
Going against all advice I decided to install my transducers side by side on my homemade sliding mount "thingy". I will report how it works out.
The Hummingbird Matrix 37 will be on 83 and the Garmin 198c will be on dual 200/50.
 
The experiment worked great. My transducers were set up as explained in post above side by side , one inch apart.
I have been out twice and used both depth finders and they both work perfectly. Then I put the Humm. on 200/83 with the Garmin on 200/50. They both worked good. I tried turning one then the other off and there was no difference.
Life is good once more on the HIGH TIDE.
 
Jack in Alaska":1duzjwxt said:
Then I put the Humm. on 200/83 with the Garmin on 200/50. They both worked good.
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Anyone know if there is any significant functional difference between 50 and 83 Hz? I'm curious why Hummingbird went with this frequency.

Warren
 
The lower frequency transducers are better for deeper water. The higher frequency are for shallow water. The 83 was probably chosen as a compromise. I find that the 200 (plus or minus) do well up to 600 foot depths. Most of my depth finders are dual frequencies. I have used an 83 hz hummingbird (have one on the Century) and it is a decent in-expensive unit. A 50 and 83 mhz units should not interfere with each other.

I have found that solid glass with good coupling (I ususally use mineral oil) gives very little attenuation of the signal--beam width seems to remain about the same for all practical purposes.
 
thataway":rwx080za said:
I find that the 200 (plus or minus) do well up to 600 foot depths. Most of my depth finders are dual frequencies.
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This reminds me that last weekend when we took the boat from Anacortes to Lake Washington and back for SeaFair, when we transited some really deep parts of the sound or the lake my Airmar shoot-through would lose contact with the bottom. Now that I think about it, I can't remember whether I was displaying both frequencies or only one. Hmmm. Anyway, I had read and been told that shooting through would cause signal loss at deep depths. Since I don't fish at 500+ feet it does not bother me that this happened.

BTW what a zoo SeaFair is. It was fun to experience once but I think I have it out of my system now! The worst part of it was dealing with the clueless skippers. The funnest part of the trip was being the lead boat out of the lock into the Sound going home.

Warren
 
In reading your threads about mounting a transducer, I noticed a suggestion about mounting in the aft bilge. I have a CDory 25. Is this do-able? Can it also be mounted in the splashwell in front of the motor?
Thanks
Amanda
 
What kind of transducer do you have Amanda? If it's one that mounts on the stern, outside of the hull, it cannot be mounted inside the boat. I suspect, if it's the one you got from a Brat, it's a fishfinder type that has to mount outside of the boat on the hull.

Charlie
 
On my sailboat I mounted my fishfinder transducer on the bottom of the hull (inside) pure fiberglass, worked great for many years. Sand smooth and put 4200 around edges. Mounted it between the Diesel engine mounts aft. C-Otter
 
I just installed a Humminbird PiranhaMAX 160 Depth Sounder on the transome of Journey On, to go with the Interphase forward looking depth sounder. Judy wanted one that showed the depths at all times, and the Interphase, which does great work in showing where we're going, gets confused on muddy bottoms and silt. The PiranhaMAX 160 is dual frequency, low for wide angle, high for narrow. I'm surprised at how cheap it was and how well it works. That usually doesn't go together.

The PiranhaMAX 160 was cheap ($82), mounted easily (with the addition of a $25 extension cable) and works great. Judy especially enjoys the fish icons drifting past.

I mounted both on the transome, using a piece of stainless channel to support the transducers, bolting the channel to the transome above the waterline. Since Journey on has a counter rotating outboard, I mounted the transducers on the port side, per both manufactures recommendations. For a normal rotation, there is room on the starboard side. the trim tabs are out of the way, and the transducers work well at all speeds, tabs up or down. I had to make some brackets to mount both transducers, but that was easy. Once in a while I reach back when we're stationary and clean the kelp off. Or back the boat down.

I'm not sure why one would want to mount the transducer on the inside of the hull, since it's so easily done on the rear of the boat. Allows easier service, as needed. And no holes under the waterline.

The dual frequencies are 83 kHz which gives a 60° FOV and 200 kHz for a 20° FOV. No discussion as to the depth of one over the other, just that it goes to 600'

Boris
 
Yes Charlie, you are right. I got it from Doryman and I believe it belongs outside the hull.
On another issue:
I just realized that I posted a query about anchoring and did not include your name as one of the people I would most like to hear from. Please forgive me. Your opinions are highly valued.
Amanda
 
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