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Transducer Question
- Thread starter Brian
- Start date
200kHz is a narrower beam than 50kHz. If you want fine detail, use 200. If you want the "big picture", use 50kHz. Many sounders have a splitscreen view which show both. I also find that the bottom makes a fair bit of difference - mud reflects differently than sand, etc.
As to thruhull or transom, thruhull is probably better. If you have a non-cored fiberglass bottom, you may be able to mount in the bilge, and "shoot through" the hull, which is probably the most reliable.
If transom, just mount where you have the best vertical shot.
As to thruhull or transom, thruhull is probably better. If you have a non-cored fiberglass bottom, you may be able to mount in the bilge, and "shoot through" the hull, which is probably the most reliable.
If transom, just mount where you have the best vertical shot.
Generally 200 is better for shallow water and 50 for deeper. A lot of depthfinders allow you to switch from one to the other depending on where you are.
What type of engines do you have? Transom mount is generally not recommended for inboard engines as prop wash will cause interference. If inboards stick with a thru-hull, or as c mentioned, a 'shoot through' hull setup. I have both on my boat, the shoot-through works better at high speeds but shows less detail in deeper water.
If you go with either of these, you should look for a spot on the hull with no water intakes, head discharges, or anything else that will interrupt the flow of water ahead of the transducer.
What type of engines do you have? Transom mount is generally not recommended for inboard engines as prop wash will cause interference. If inboards stick with a thru-hull, or as c mentioned, a 'shoot through' hull setup. I have both on my boat, the shoot-through works better at high speeds but shows less detail in deeper water.
If you go with either of these, you should look for a spot on the hull with no water intakes, head discharges, or anything else that will interrupt the flow of water ahead of the transducer.
What is the loss if any for a in bilge mounted transducer verses through the hull unit? If I boat mainly on waters that have a sand bottom and range fro 30 to 200 feet what would be a good transducer for a Garmin 3000 series system? I asked this before and got some answers, but i did not include the bottom conditions. If i could go in the bilge I could do it myself, something I would prefer.
Thanks in advance for any help on this question nand i do not mean to steal thread, but i do have same questions. Also does anyone know if a Meridian 411 has a cored bottom?
John D
Thanks in advance for any help on this question nand i do not mean to steal thread, but i do have same questions. Also does anyone know if a Meridian 411 has a cored bottom?
John D
- Joined
- Jul 21, 2005
- RO Number
- 18340
- Messages
- 552
quote:
Originally posted by Brian
What is the difference between 200khz and 50khz.Is one for deeper water and the other shallow. What kind is more reliable...thru hull or transom mount. If transom...where on port or starboard or in the middle. Does it matter???
50 kHz goes deeper, but with less detail. 200 kHz has less depth bit much more detail. You should not have to compromise - most transducers are dual 50/200kHz units. You can adust the view on your screen - 50, 200, or both.
I would high discourage using a transom mount. Speaking from my own and other's experience, they simply don't work well because of the water turbulence.
That leaves in-hull or through-hull. They are equally sensitve becasue the in-hull is tuned to adjust for the hull thickness. But they can only be used on a solid fiberglass bottom. With a through-hull you can also include a temp and speed sensor, depending on the model selected.
JUST-IN-TIME
Member
- Joined
- May 23, 2006
- RO Number
- 21381
- Messages
- 162
through hull is the best, next shoot through but u will not get temp
if u go transom make sure u mount it at least 12" away from the cavitation plate
if u go transom make sure u mount it at least 12" away from the cavitation plate
I have decided thru hull is the way to go but now my new question is I see transducers with different degress...12 and 14...what does this mean..hopefully I can use the same opening I have for my fishfinder.
Just take that out and replace with new one. This is a combo unit GPS/sounder my old GPS gives me my speed....the new one will too...don't all GPS Units give that info? I really appreciate the info I have received. Information we can all store away and retrieve when needed or to share with others
Just take that out and replace with new one. This is a combo unit GPS/sounder my old GPS gives me my speed....the new one will too...don't all GPS Units give that info? I really appreciate the info I have received. Information we can all store away and retrieve when needed or to share with others
- Joined
- Jul 21, 2005
- RO Number
- 18340
- Messages
- 552
quote:
Originally posted by Brian
I have decided thru hull is the way to go but now my new question is I see transducers with different degress...12 and 14...what does this mean..hopefully I can use the same opening I have for my fishfinder.
Just take that out and replace with new one. This is a combo unit GPS/sounder my old GPS gives me my speed....the new one will too...don't all GPS Units give that info? I really appreciate the info I have received. Information we can all store away and retrieve when needed or to share with others
There are two types of speed indicators: GPS and in-water. GPS gives your speed over ground wihc is good for course and ETA information. In-water - typically a paddle wheel in this case - will show you your speed relative to the water. This is good when fishing and want to troll at a certain speed to entice the fish to bite.
Degrees - need some more contextual info. Could refer to the beam angle or the hull angle. Beam is the "cone" angle at which the sound energy is emitted from the transducer - wider = greater areas but less detail.