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Author Topic: Is It Worth It  (Read 133 times)

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Offline Bayou Basser

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Is It Worth It
« on: January 11, 2021, 12:50:41 PM »
I have an old 899 SI unit that is still working just fine.  It has, of course, 800KHz capability.  I'm considering purchasing a Helix 8 MEGA SI+ G4N.  Is upgrading to mega imaging really worth the money?  Are the sonar returns really that much better than 800KHz?

Quentin.

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Offline rnvinc

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Re: Is It Worth It
« Reply #1 on: January 11, 2021, 09:23:27 PM »
The difference in 800kHz to MEGA (1200kHz) is about the same difference you see in 455kHz to 800kHz  ...

Noticeable - yes  ... earth shattering - meh

Rickie
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Offline Bayou Basser

  • Jr. Member
  • **
  • Joined: Jan 2014
  • Location: West Monroe, LA
  • Posts: 70
  • Unit(s): 899ci HD SI, Helix 5 SI
  • Software: 7.650, 7.730
  • Accessories: None
Re: Is It Worth It
« Reply #2 on: January 12, 2021, 08:09:09 PM »
Thanks Rickie.  I'll probably upgrade anyway.  Put the Helix 8 on the console and move the 899 to the bow.  I did notice that the Helix SI has 86 degree coverage in mega which the 899 800Khz is 55 degree AND I believe DI has it's own piezo. Correct?

Bayou Basser
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Offline rnvinc

  • Hero Member
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  • Joined: Nov 2009
  • Location: Western KY
  • Posts: 3955
  • Unit(s): 1197c SI Combo, Onix 8ci SI Combo
  • Software: Dependent on whim
  • Accessories: AS GRHA, AS GPS HS, LowBird LSS 1 & 2
Re: Is It Worth It
« Reply #3 on: January 12, 2021, 10:24:19 PM »
HELIX 8 SI does have a dedicated DI piezo  ...

899 SI does not have a dedicated DI piezo  ... the DI image is computed generated from the data received by the SI piezoes  ...

Rickie

« Last Edit: January 12, 2021, 10:25:31 PM by rnvinc »
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Offline Bayou Basser

  • Jr. Member
  • **
  • Joined: Jan 2014
  • Location: West Monroe, LA
  • Posts: 70
  • Unit(s): 899ci HD SI, Helix 5 SI
  • Software: 7.650, 7.730
  • Accessories: None
Re: Is It Worth It
« Reply #4 on: January 13, 2021, 10:03:47 AM »
Thanks Rickie.
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