- Created on Tuesday, 30 August 2011 05:05
So what's the difference?
Narrow beam means it covers 15 to 30 degrees, whereas wide beam means it covers 40 to 60 degrees.
Obviously this means that narrow beam transducers have a smaller coverage area so you won't see as big an area. But this also means that the clarity is much higher.
So when should you use one or the other?
The bottom line is that a narrow beam transducer is appropriate for shallow waters. Not seeing a wide area doesn't matter and you get a much better picture.
A transducer for shallow water use, is usually narrow beam and high frequency.
- Created on Monday, 11 July 2011 23:47
In this post we're going to talk about one of the most frequently asked questions we get.
Which is better - low frequency or high frequency transducers in New Zealand waters?
Folks fishing in water depths less than 100m are best to use higher frequency transducers. These provides better bottom definition, reef structure and fish detail. Lower frequencies are generally good for water depths over 100m. The basic rule of thumb is the higher the frequency the better the definition, the lower the frequency the deeper the fishfinder can read.
If you're doing most of your fishing in less than 100m of water then it's better to use a high frequency transducer like 200KHz.
If you are fishing in over 100m it's better to use lower frequencies such as the 50KHz. 200KHz is an ideal frequency for water depths shallower than 100m as it provides excellent definition of what is going on below. You are often able to distinguish between bait fish and predator fish species. Fisherman often become so familiar with their fish finder readings that they can identify specfic fish species. This is the key benefit of higher frequencies. It can take a lot of guessing away from when to start fishing or when your dropping your line on a school of bait.
The limitation to higher frequencies is their depth. As you go deeper they begin to loose signal. This is where you require lower frequency fishfinders. A lower frequency such as 50KHz is good for water depths over 100m plus, and usaully have around 4 times the depth potential. Lower frequency transducers are able to penetrate deeper and give bottom definition or fish readings in greater depths than a 200Khz transducer. The definition is not as clear as higher frequencies however if you invest in a top end Airmar 1KW transducer (with 50KHz) you will still be able to maintain a clear image almost to the level of a 200KHz transducer used in shallow water.
- Created on Wednesday, 13 April 2011 03:53
The most common query we get for a replacement Transducer is for the Navman fishfinder.
There must be a lot of old Navmans out there!
- Created on Sunday, 06 March 2011 22:35
As we spend a fair amount of time and effort promoting the use of high quality Transducers we get some idea of what are the popular brands of fish finders...
The following table shows the percentage that each brand of fish finder generates in queries when people are researching transducers...
Suprised? We would be interested in your thoughts!
- Created on Tuesday, 11 January 2011 03:01
Sometimes its good to remember the basics. Got a poor display on your fish finder?
Try checking your mounting.
- Try adjust the transducer angle. The fish finder's transducer transforms electrical signals into information the display can read as fish.
- Transducers need to be positioned perpendicular to the water to produce the best images.
- If the transducer is mounted on the boat's transom, loosen the mounting screws with a drill and adjust the angle to perpendicular.
- If you're using a thru-hull installation, you may need to move the transducer for a better signal. Use marine grade sealant to fill all holes from the previous mount.