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transducer help

Old 02-20-2015, 04:29 PM
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Default transducer help

I have decided on the 7612xsv, a single one for now. I have to travel through Barnegat / Manahawkin Bay and find that it seems like half the bay is 1 ft. deep, so I do not want to install a GT50 thru hull single in the keel or a pair with fairings for fear of grounding. I decided to install a B175 thru hull because it is a flush mount but it was suggested by different sellers to go with a B175M and the other suggests a B175CH-W, I will fish mainly in less than 300ft and plan to target tuna mahi and wahoo when offshore, canyon depths are deeper than 1500ft. I also plan to take advantage of the sidevu and downvu options of the XSV but want to try just a single transducer first, centered between the engines.
So which B175 would be a better fit for me ?
And if the single GT30 gets shadows from the engines is there a pair or other half of the GT30 I could use to mount them outboard of the engines or will I have to buy a GT50 pair and discard the GT30.
Old 02-20-2015, 04:54 PM
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If you fish to 300' and then deeper the B175M would be a good choice.

If you use the GT30...and find it is shaded by the engine you simply add the second GT30 and the Y cable.
Old 02-20-2015, 04:55 PM
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What boat do you have?I think the key here is where youll spend the majority of your time fishing and from what I read here thats under 300ft. Id go high, youll be marking flounder holding bottom
Old 02-20-2015, 05:47 PM
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Originally Posted by semperfifishing View Post
If you fish to 300' and then deeper the B175M would be a good choice.

If you use the GT30...and find it is shaded by the engine you simply add the second GT30 and the Y cable.
When I went to the AC boat show I was not sure what transducers I would be using and asked the Garmin guys about the GT50 paired with a GT30 and they said no it could not be done because both transducers would be doing the same thing, down vu and to the sides vu and that I needed to purchase a paired GT50 set so that one would be working left side and the other the right side and down vu, so I just want to be sure that I could use 2 GT30's to get down / side vu if I needed to use both units instead of just the one because they do not come in a paired setup.
Old 02-20-2015, 05:48 PM
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Originally Posted by BoemarineBrian View Post
What boat do you have?I think the key here is where youll spend the majority of your time fishing and from what I read here thats under 300ft. Id go high, youll be marking flounder holding bottom
But will I still be able to mark fish that are well below 300'
Old 02-20-2015, 06:03 PM
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Originally Posted by mikewest57 View Post
When I went to the AC boat show I was not sure what transducers I would be using and asked the Garmin guys about the GT50 paired with a GT30 and they said no it could not be done because both transducers would be doing the same thing, down vu and to the sides vu and that I needed to purchase a paired GT50 set so that one would be working left side and the other the right side and down vu, so I just want to be sure that I could use 2 GT30's to get down / side vu if I needed to use both units instead of just the one because they do not come in a paired setup.
The GT30 does not have to be purchased as a pair.

I have personally used the GT30 as a single..and then added a second unit to compete the pair.
I have sold many GT 30 singles and then a second unit to complete the pair to other THT members.
They work...and you can start with just one..and add the Y cable and the second GT30 if needed.
Once the Y cable is used that sets up the Starboard ducer for right side and down.....and the Port unit to left side only.

http://www.thehulltruth.com/marine-e...ransducer.html

Here is Bluewaterpirate's install of the pair.

Last edited by semperfifishing; 02-20-2015 at 06:18 PM.
Old 02-21-2015, 03:24 AM
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Originally Posted by mikewest57 View Post
But will I still be able to mark fish that are well below 300'
This was just posted by Abbor, " For me it works well at 400m, but I use this boat most in a cold clear deep lake. According to what I've heard it should show targets down to 600' in saltwater."" B175 is available in several variants, but B175H-W has a 25 degrees cone. It can be used at any frequency from 150-250kHz, but I'm not sure how much of this band which is supported by FCV-295. B175H-W has close to constant 25 degrees cone angle for the complete supported frequency band. It has a Q-factor of 2 which will give excellent resolution due to minimal ringing. The transducer has also very good sensitivity. B175H-W is the most impressive transducer I've ever used, and I've tried a lot

I'm usually operating B175H-W in CHIRP mode, but here is an example of how it looks in 200 kHz fixed frequency mode.*

[
Old 02-21-2015, 06:46 AM
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does the B175H-W come with a connector for plug and play to the 7612 or just a bare wire and needs additional wires and connectors, and same question for the B175M.
Old 02-21-2015, 01:12 PM
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You will need the Garmin wire block adaptor on the HW. No butt connectors! The m is available with Garmin plug spliced on.
Old 02-21-2015, 01:20 PM
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Originally Posted by mikewest57 View Post
does the B175H-W come with a connector for plug and play to the 7612 or just a bare wire and needs additional wires and connectors, and same question for the B175M.
B175C-HW Garmin transducers with the 8 pin plug....no adapter needed.
In the pipeline as we speak.


010-12181-20 B175HW, 8-pin,CHIRP, Thru-hull,0
010-12181-21 B175HW, 8-pin,CHIRP,1kW, Thru-hull, 12
010-12181-22 B175HW, 8-pin,CHIRP,1kW, Thru-hull, 20
Old 02-21-2015, 01:42 PM
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Still have a decision to make, the HW cost a few hundred more than the M. thanks guys

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