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Benefit of MEGA? #14493432 10/01/22 09:22 PM
Joined: May 2003
Posts: 1,104
J
James Roberts Offline OP
Extreme Angler
OP Offline
Extreme Angler
J
Joined: May 2003
Posts: 1,104
I have a Helix 10 G2N and my ducer went south. The best price I have found for the exact replacement is $305 There is another option at $190 but I loose the MEGA fetcher. What exactly does MEGA give me and is it worth the extra $$$ ?
Thanks,
JR

Re: Benefit of MEGA? [Re: James Roberts] #14493521 10/01/22 11:37 PM
Joined: Nov 2010
Posts: 5,095
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Wayne P. Offline
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MEGA stands for MEGA HERTZ or 1000 KILO HERTZ. It's a frequency range just like 455 kHz or 800 kHz used with Humminbird Side Imaging and Down Imaging.
That higher frequency produces a thinner Imaging pulse than the lower frequencies and the thinner pulses produce sharper images.
Since newer units CHIRP the sonar frequencies, all three of those are CHIRPed. CHIRP broadcasts multiple frequencies per ping. The MEGA CHIRP's range is 1.0-1.3 MHz. Default is not the entire range, you will see the range displayed on the Imaging views that the unit is using.
The transducer does not produce the frequency, it is just a combo speaker/microphone that broadcasts the sound frequency and then detects the return sound frequency. The unit produces the frequencies, and the standard transducer for a unit is made to work best in those frequency ranges.

You can dumb down most units to function like an older model to use the older/cheaper/less capable transducers if you want.
If you state which one of the three different second generation Helix 10's with MEGA Imaging (the whole model name as shown in the SYSTEM STATUS view) you have and the model of the transducer you are considering, I can tell you what the possibilities are.

Last edited by Wayne P.; 10/01/22 11:46 PM.

Helix 12 CHIRP MEGA SI+ GPS G3N and G4N, 1198c SI, SOLIX 10 SI G3,
Helix 8 MEGA SI+ GPS G4N, SOLIX 12 SI and G3, MEGA 360, MEGA LIVE TL, RC-1
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