View Full Version : 50/200khz vs 83/200 kHz transducer????

12-28-2011, 12:09 PM
I was hoping I could get some help deciding which transducer to buy with my new unit. I talked with the tech guy for lowrance yesterday and he wasn't a whole lot of help( maybe a new hire). I mainly fish in lakes, rivers, and the bay. Very seldom am I in water over 500 ft deep. So with that I think I should be buying the 83/200 kHz, but what I don't really understand is the difference between the two. If any one could help explain this, what the 50, 83, and 200 exact functions are it would really help!! Thanks

12-28-2011, 02:16 PM
Think of your transducer like a speaker and a microphone; one part shouts, the other listens. Wider (50-khz) beams penetrate deeper with less detail, while narrower (200-khz) beams penetrate less depth with greater detail
The 83kHz transducers are typically low cost transducers with only one element for both 83 and 200kHz. This gives a wide cone angle which is excellent for shallow waters. Go for a 83/200kHz if you typically fish at 100' or shallower, if not go 50/200kHz.

12-29-2011, 08:43 AM
Maybe I can help you both here. With the HDS and 200 kHz you get a full 60* coverage. That means in 100 ft of water you get 115 feet of coverage. Running the 83 kHz freq. you get a full 120* coverage, so at the same 100 feet of depth you see more than 300 feet of coverage. I have used my HDS at 300 feet without incident to discerning targets either suspended or on the bottom amidst structure on the 83 kHz side.

It is not really two frequencies. The Lowrance broadband sonar has the ability to run the 200 kHz transducer at 83 kHz which gives you a 40* cone angle, and with the 2 side lobes you get a FULL 120* cone angle. The product literature states excellent target separation with the 200 kHz down to 650+ feet. I personally have not fished waters this deep to give you a hands-on report. I think if I was spending any amount of time in better than 300 feet of water I would get the Airmar transducer best suited for your application even though you will get less cone angle.