Installing an Airmar TM-265LH Transducer
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- Опубликовано: 4 июл 2024
- s04e58
I have been wanting to try deep dropping for a few years now, but I haven’t had the equipment needed to try it. When I bought the Baysport and the Raymarine Axiom MDF for it I had in mind getting a good transducer that would enable me to give it a try.
Well, after several months of research and I finally settled on an Airmar TM265LH. The TM part is for transom mount, that wasn’t my first choice, but all the other options had to be ruled out for one reason or another. The LH stands for low and high frequency modes of operation.
For those of you that have never heard of Airmar, they manufacture a wide range of world class acoustic sensors including professional and recreational marine sonar transducers. The same model of Airmar transducers is used on a wide range of sounders, just by changing the attached plug. In fact, you can buy Airmar transducers without a plug and fit a plug that suits your sounder, just make sure the transducer model is supported by your sounder. For instance, my Raymarine Axiom Pro will run a 1kw CHIRP transducer, but the similar Raymarine Axiom (not Pro) will not.
I chose the LH version because I fish both offshore and in the bay. The low frequency will be valuable in the deeper waters offshore along with having the capability to find bottom in 900m (3000 ft) while the high frequency will be best in the bay.
The other main alternative is the LM variant which stands for low and medium frequency operation. This gives the same performance offshore using the low frequency while the medium frequency gives a greater depth coverage than the high frequency at the expense of some clarity and target differentiation. This is the better choice for anglers who want to do most of their fishing offshore.
I have been out for a couple of trial runs in the bay, and I have been very impressed with the increased quality of my 2D sonar images. Not only that but I finally have a sonar system that holds bottom in all the conditions I have thrown at it so far.
Don’t get me wrong, the RV-100 transducer that I originally got with the Axiom is a good transducer, but it is small when compared to the 265LH transducer. The RV-100 packs 2D, down vision, side vision and 3D views into that smaller volume. The 265LH on the other hand only does 2D CHIRP in a much larger and heavier package, this allows it to house multiple sensors and give a much better picture of what is below.
I will be heading offshore again once the Snapper and Pearl Perch ban is lifted so keep an eye out for some screen shots of the 265 in action out there.
00:00 Introduction
01:06 What’s in the box
02:41 Building the mount
05:28 Fitting the bracket
06:00 Mounting it on the boat
09:20 On the water
10:31 Making it permanent
11:45 Epilogue
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Buy Airmar 1kw Chirp online:
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TM-265LH ebay.us/BAScqI
TM-265LM ebay.us/2wYwWr
TM-265 ebay.us/seP8Be
Airmar 265 ebay.us/bcdobj
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I just finished making the same for my boat , thanks for your video this helped a lot, I used 4mm 316L stainless steel with 4 imperial 1/4 bolts below since the Airmar support is made for imperial and not metric as we use here in Europe. Did you think of adding a small anode to the plate for salt water use?
Glad it helped. I did think about but decided that it probably wasn't necessary. I have been using it for a bit over two years now and there is no sign of electrolysis on the stainless steel.
Hi mate
Why you choose tm265lh
And not tm275lhw
After using it any feedback.
Thinking to get one for my axiom pro.
The L part is the same as the one I have but the HW is a high and wide. It is designed for hunting pelagic fish in the water column, such as Marlin. The wider beam lets you cover a larger area of the water column. I mainly fish the bottom so that is what I want the transducer optimised for. I feel that the wide beam makes it more difficult to pinpoint there the fish are since it covers a much larger area of the bottom than the normal H.
It all depends on what sort of fishing you mainly do and I guess also personal preference.
Hi.
How does the L on the TM275LHW compare to the L on the TM265LH Ducer?
What is the cone angle of the H on the TM265LH?
Can I use the L of the TM275LHW in shallow depths from 5-26m?
Cameron
The low frequency is identical according to the specs.
Smaller than the 275, 6 to 10 degrees.
I use the high frequency in anything shallower than 100m. Deeper than that, experiment to find the best returns.
Great build, do you believe the stainless plate flexes a bit with the water resistance hitting the large transducer?
I don't think so. it is 3mm thick, has a piece of angle to stiffen it and it also has Stikaflex under it. I think it is as secure as the transom itself.
@@weFishAU, I really like how you mounted it! I will be doing the same on my boat, I don't like to make holes under the waterline, and this way I can adjust the tilt very nicely. Thanks for the idea
Hi mate, wondering how you went with this and whether you can still keep bottom of 300m at speed.
It is going great. I haven't had a chance to get out deeper than 160m yet, but it has held bottom in everything up to the speed I am comfortable to travel at for the sea conditions. More importantly, it makes it easier to pick out fish as the water gets deeper.
thanks mate. I've been thinking of a thru hull, but it just got too hard. I ordered a TM yesterday.. I'm looking forward to trying some deep water.
I also found the thru hull was way too hard. I think you'll be happy with the TM once you get it adjusted right.
Will this transducer work with FurunoGP 1871F ?
I don't think so, at least not directly connected. It may be possible to connect it via a "black box" that provided the functionality needed for dual frequency CHIRP. Furuno technical support should be able to tell you for sure.
Great ! what do you think. i'm not sure TM-185M or TM-275LH
I'm not familiar with a 275LH, but I have seen the specs for a 275LH-W.
The low/high frequency transducer that I have (265LH) is what you want if you fish deep drop and shallow. The medium frequency (165M) is an all round compromise, not as good as low frequency for deep dropping and not as good as high frequency for shallow fishing but a reasonable selection for a mix of both (but not too deep). The 275LH-W has a wider beam width of 16° to 25°, the 265LH has a beam width of 6° to 10° and the 165M has a beam width of 6° to 11°.
Unless you are mainly hunting pelagics I would not be looking at a wide beam transducer (275LH-W). The 165M is significantly cheaper, so if you don't intend to do any deep dropping in 300+m then you could save some money going with the medium frequency, at the expense of slightly less discrimination in shallow water.
Airmar is the manufacturer and their pages give a good breakdown of the specs.
www.airmar.com/Product/TM165HW
www.airmar.com/Product/TM265LH
www.airmar.com/Product/TM275LHW
Just be aware that the effective depths they quote are in ideal conditions, something never realised in the real world.
Thank you ! yes i mean 265LH not 275
i'm fishing in Croatia. Deep between 300feet and 100feet. Slow jigging and Livebait Fishing (Tuna)
Is this unit compatible with a lowrance hds live??😢
I know for certain that Airmar does make this transducer with a plug to fit Lowrance units. Whether or not the HDS live is one of the compatible units I can't say for sure. Lowrance or Airmar technical support would be the best people to ask.
@weFishAU Thanks mate.👍
Is Tm265Lh better than Tm185m,
Depends on what you want to use it for. The LH stands for low and high frequency. The M is for medium frequency. Lower frequencies allow you to find fish in deeper water, higher frequencies show more detail but can't penetrate as deep. I pretty much view medium frequency as a compromise between the two. Nothing wrong with a compromise if that is what you need. I fish in the bay and offshore so the LH makes sense for me.
The other advantage of the dual frequency is that my MFD can transmit both at once which gives quite a few advantages. I believe that several brands can do the same but I have a Furuno TZ3 now.
@@weFishAU Thank you for the explanation, I have a Garmin 923xsv + GT5I. After seeing the video, the Tm265lh sonar results are satisfactory, but the price is too expensive,
Perfect weather for boating, and banned from boating
Tell me about it. I have a day off on Friday and 3 days of perfect weather but instead of being out self isolating on the water I am couped up at home. Shakespeare had no idea what a real tragedy is.