Author Topic: Humminbird 798ci HD SI Combo  (Read 17068 times)

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Offline Irishrover

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Humminbird 798ci HD SI Combo
« on: November 24, 2011, 03:48:54 PM »
Last June I bought the Humminbird 798ci SI Combo NVB and have been extemely happy with it. My buddy is looking to buy either the same unit I have or the Humminbird 798ci HD SI Combo. I don't think it's worth the extra $300. Does anybody who has knowledge of both have an opinion? Thanks.


Offline Humminbird_Greg

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Re: Humminbird 798ci HD SI Combo
« Reply #1 on: November 25, 2011, 10:54:33 AM »
All of the 798 units have had the same display and the same LED type backlight.  The differences between these two units are the maps and the Ethernet connection on the newer “HD” version.

Greg Walters at Humminbird
gwalters@johnsonoutdoors.com

Offline Irishrover

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Re: Humminbird 798ci HD SI Combo
« Reply #2 on: November 25, 2011, 11:54:49 AM »
Greg...I understand what you are saying. Now since this is for the trolling motor (997 on console)...If it was you the, 798ci HD SI is the way to go. Is any of the 800's worth the extra $$? If you were choosing...which of the 800's would you be considering? It will be on the trolling motor & since there's already a unit w/SI (997) on the console...is having a unit w/SI a must or would you be happy w/858c DI combo?

Offline sonar2000

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Re: Humminbird 798ci HD SI Combo
« Reply #3 on: November 25, 2011, 03:17:17 PM »
I believe the '98 models have a different u-code in the unit..Not a big deal but some enhancement over the old code for timing, speed, picture, etc along with ethernet..

Chuck

Offline Humminbird_Greg

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Re: Humminbird 798ci HD SI Combo
« Reply #4 on: November 26, 2011, 10:18:58 AM »
Yes Chuck, both of these units runs a different unit program and they also have a different PCB in them - but operationally the only difference is the Ethernet connection.

997 on the console... that means no Ethernet connection to the console unit.  I think that I would still go with the "HD" version just for the possible future connectivity - but then I like gadgets!

If cost was not a stopping block, and for my dimming vision, I would look at the 898c Si unit for the bow. I like the option of being able to point the Si beam(s) where i want them such as pulling up to a bank and using the left (or right) Si beam as a searclight and scanning the bank or some shallow water area.  We did this around some oyster beds down in the gulf and were able to spot some nice sized Redfish up on the beds.  The 898c Si is like the 858c with the addition of the Si sonar capability, so even if you don't use the Si sonar that much at the bow; it is always there when you need it.

« Last Edit: November 26, 2011, 10:51:12 AM by sonar2000 »
Greg Walters at Humminbird
gwalters@johnsonoutdoors.com

Offline sonar2000

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Re: Humminbird 798ci HD SI Combo
« Reply #5 on: November 26, 2011, 10:53:54 AM »
If cost is not an issue the the 1198 is the top of the line and bigger screen.
Greg, dimming vision?  Maybe santa will get you a large laptop for xmas and with the big screen for video in... ::) 8)
Chuck

Offline Irishrover

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Re: Humminbird 798ci HD SI Combo
« Reply #6 on: November 30, 2011, 02:05:31 PM »
thanks Sonar, but 1198 is DEFINATELY out of my reach. If I decide to sell the 798 I have, the 858 is going to be hard enough to buy.

Offline sonar2000

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Re: Humminbird 798ci HD SI Combo
« Reply #7 on: November 30, 2011, 04:03:53 PM »
Irish, you will be fine with the 858. Most of ther difference is in the screen size. Most all work the same way..
Let us know how you end up and of course if any questions just post here..
Chuck

Offline Irishrover

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Re: Humminbird 798ci HD SI Combo
« Reply #8 on: November 30, 2011, 11:31:26 PM »
Which 858...I still don't understand why Humminbird came out w/3 858 units & only 1 has SI?

Offline Humminbird_Greg

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Re: Humminbird 798ci HD SI Combo
« Reply #9 on: December 01, 2011, 10:54:04 AM »
 ???
Irishrover, there should only be two different “858” models:
858c Combo – this is a 2D sonar only combination sonar-GPS unit.
858c DI Combo – this is a 858c Combo unit with the addition of the Down Imaging (DI) sonar.

In the 800 series model line up there is also a 898c Si Combo unit (which os like a 858c Combo unit with Si sonar).

Greg Walters at Humminbird
gwalters@johnsonoutdoors.com

Offline sonar2000

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Re: Humminbird 798ci HD SI Combo
« Reply #10 on: December 01, 2011, 02:44:59 PM »
I think any model should be one standard, make the difference between unit types. Eg: di or si or 2d...
Sometimes you can get too many products...
This causes user issues in selection or may make a second purchase necessary once the user figures out the unit..
Not so complex of a choice on what to buy.

Chuck

Offline Humminbird_Greg

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Re: Humminbird 798ci HD SI Combo
« Reply #11 on: December 01, 2011, 04:33:16 PM »
I think that I am understanding you here Chuck and it would make it easier on both the Customer and us; except when it comes to packaging.  Than we would be back to having to select which variation you want based on the type of sonar (the one with the 2D only transducer, the one with the DI transducer or the one with the Si transducer…).  Best options from a manufacturing standpoint would be to either pack them with all of the transducers (or an all-in-one transducer) or package them with no transducer.  Pack them with the first option and the price will go up for everyone and there are many who will not pay for it or cannot afford it.

Fewer products being offered would make things simpler all around but not everyone would want to pay for features that they are not going to use.  We have to offer products at many price points in order to remain competitive – because if we don’t offer a unit at a certain price point then the competition will.

Greg Walters at Humminbird
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Offline sonar2000

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Re: Humminbird 798ci HD SI Combo
« Reply #12 on: December 01, 2011, 05:05:08 PM »
Nope, what I am saying is that have a product (798) that has 2d, then a product (998) that is di, then a product (1198) that is si. 
Keep it simple...
Chuck
 

Offline Humminbird_Greg

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Re: Humminbird 798ci HD SI Combo
« Reply #13 on: December 02, 2011, 11:34:23 AM »
 ??? So you are saying is to not have the different types of sonar offered in the different sizes of displays?  That to get the Si sonar you would have to shell out $3,000 for the big display unit?  ???

I believe that we would be out of business rather quickly if we did that!  :o

Greg Walters at Humminbird
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Offline sonar2000

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Re: Humminbird 798ci HD SI Combo
« Reply #14 on: December 02, 2011, 12:58:10 PM »
Exactly,
Meet the customer needs and not confuse them with 10 units and 50 options...
HB is the only sonar that has 50 variations of a product..
And legacy products that are still "new" to the market....
Chuck

Offline dtgun01@cablelynx.com

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Re: Humminbird 798ci HD SI Combo
« Reply #15 on: December 02, 2011, 11:07:35 PM »
New user here, 798ci HD si;  Don't know if this is the best place to post, but my intent was to mount ducer on trollmotor.  Will not work on Motor Guide Digital b/c of interference.  Been thru many posts, and haven't seen this mentioned.  Called HB & no fix available.  Works great on transom.

Offline Humminbird_Greg

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Re: Humminbird 798ci HD SI Combo
« Reply #16 on: December 05, 2011, 01:27:38 PM »
Have you actually tried the unit mounted up there or are you going on what you have heard/read?  I ask this because one trolling motor may be broadcasting this interference while another identical trolling motor may not.

Greg Walters at Humminbird
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Offline dtgun01@cablelynx.com

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Re: Humminbird 798ci HD SI Combo
« Reply #17 on: December 06, 2011, 10:46:58 PM »
Thanx for your reply - Yes, I had it mounted there.  Got varying degrees of interference on SI & DI at different trollmotor speeds.  As one of the forum entries indicated, I got no interference at full speed, but some degree of interference at all other speeds.  Tried several fixes, including grounding cranking battery to trolling battery, rerouting wiring, etc.  My model has the built-in filter in the power cord.  My trolling battery cables run under the port gunnel, while all other wiring runs under the other side. 

I even removed the ducer and moved it around by hand while the trolling motor was running, and within 3 or 4 inches of the motor I got interference.

I do most of my scouting at trollmotor speeds, 2 to 3 mph, so I'd love to have it up front.  I understand the nuances of travelling in a relatively straight line to get reliable readouts.

My understanding is that the Motorguide Digital conserves battery power by cycling rapidly on and off at less than full speeds.  I presume that cycling is what interferes with the signal.

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Re: Humminbird 798ci HD SI Combo
« Reply #18 on: December 07, 2011, 12:22:56 PM »
“My understanding is that the Motorguide Digital conserves battery power by cycling rapidly on and off at less than full speeds.  I presume that cycling is what interferes with the signal.”
Yes, this is known as “pulse width modulation” and if the frequency that it happens at matches the same frequency used by the sonar or an internal frequency in the unit – you get interference.  Just be aware; what works on one boat will not work on another, so what the Humminbird CRC Reps may suggest the first or second time may not be what works for your boat.

Greg Walters at Humminbird
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