Moving transducer
Submitted by Livewire on Wed, 2018-05-09 18:29
Hey guys after some advice on moving my TM/1kw transducer. The 200Hzs worked fine but 50hzs very intermittent. I marked the old position, the bottom of the transducer hung just below the hull. I'm thinking similar depth but move it a couple of inches towards the motor. In hope too clear the signal up. What do you think?
Image Upload:
ChrisG
Posts: 558
Date Joined: 30/12/11
My experience suggests
My experience suggests moving further away from motor and thus further away from prop wash is better....not closer.
I’d suggest where you have it is okay and you should focus on both the face angle and the height.
Mine ended up being about 0.5-1cm below the hull at the front and about 1.5cm at the back. Also I moved mine slightly further away from motor so I didn’t have in line with the strakes...this got me good picture below 10kts.
I eventually went to a wet box set up but that was more about improving my picture at higher speeds...mine is just one of those hulls that creates lots of disturbed water at over 10kts so Transom mount tranny’s just don’t work at speed for me...below 10kt was okay thou once I got the angle right.
theres a million guys on here that could walk outside and take a photo of a perfectly set up TM260 for ya if you ask
Livewire
Posts: 271
Date Joined: 25/11/16
Thanks
Cheers chris. Mate at any speed my 50hzs signal is rubbish even on the drift. I have aPerfect signal with the 200Hzs. I just assumed it was the wide beam angle . I've got some shims I'll see if I can drop the back a touch. With the angle forward dose it effect the the bottom picture? When you approach your spot will you see it on the screen befor your actually over it?
ChrisG
Posts: 558
Date Joined: 30/12/11
Yep it will be slightly
Yep it will be slightly ahead of the boat which is good cause you drive a boat forward so by the time the return beam comes up you’ll be over it. It’s more dynamic than that thou cause it not a single laser-type beam it’s a cone (of beams) which is also why there isn’t an issue when on a drift in any direction
Transducer placements is a “journey” for most people and usually takes many a trip and heaps of mucking around until you’re happy.... and then you start on the tuning it in “journey” - I’m still on the tuning journey. Knowing what settings work best in different depths at different speeds at different frequencies is all just time on the water mucking around with it (auto functions are mostly crap. Turn them off and you’ll learn more). I’ve nailed 200kz now from 0-80m. After 200m on 50hz I’m (we’re) getting heaps better but i’m still learning and we were marking individual fish in 300m plus last year and early this year....so nearly there.
not many people jag transducer placement first time - unless you’re a bloke I know on here who shall remain unnamed who recently told me he’s the “world‘s greatest fisherman” he nailed his new tranny position first time, but he’s often kissed on the dik by the fish fairy.
Deleted
Posts: 6265
Date Joined: 26/04/14
if adjusting your angle
if adjusting your angle doesnt work this would be my thoughts. Or put your deckwash pickup near the red X and transducer further left
z00m
Posts: 1086
Date Joined: 10/05/14
Gilly is on it
If the strake is throwing bubbles onto the trans face then moving it is the go. If 200khz is great even when moving but 50khz doesn't work even with motor off drifting then I would think there is an issue with trans or head unit maybe?
ChrisG
Posts: 558
Date Joined: 30/12/11
Yep, didn’t see the strake
Yep, didn’t see the strake in the photo. Move away from it for sure.
bouttime
Posts: 703
Date Joined: 27/07/06
Without seeing the full
Without seeing the full transom I would be putting it where your water pickup is and move the pickup to the other side. You want as much clean water as possible.
If your low freq is not working at low speeds then its prob stuffed. I know of 3 TM260 up here that have been returned and replaced under warranty as the 50khz was stuffed.
Its all trial and error and don't be afraid to have it a bit lower in the water then a normal transducer.
Livewire
Posts: 271
Date Joined: 25/11/16
Thanks
Cheers for the info boys I'll test the new set up asap and report back.
ranmar850
Posts: 2702
Date Joined: 12/08/12
Closer to your centreline "may" work better
On the drift, it will be deeper in the water, less bubbles as the chine on that side comes back down, and not be travelling through as much of an arc as the boat rolls. But this would have less effect travelling at speed. just something else to think about.