585 - 1kw tuning tips 50Khz
Submitted by grayzeee on Thu, 2011-06-02 13:19
hey guys
starting the first forays out wider and was having probs with heaps of noise/clutter.
just wondering what settings you found gave good results that i could try next time i'm out deep?
was getting solid bottom reading's out as deep as we went (330 ish) but had to colour erase the clutter away . ended up running high amounts of clutter/colour erase which must be wrong.
what tvg are you using??
got the 258 transom mount btw.
cheers
____________________________________________________________________________
If I spent half as long fishing , as I do reading this bloody forum , I'd be twice the fisherman I am.
Lucky Tim
Posts: 2536
Date Joined: 28/11/07
try setting the range onto 30
try setting the range onto 30 or 50m and shifting it down to show the bottom in the lower third of the screen. I get a good picture on mine (585 and M260 in hull tranny) doing this but if I set the range to 400m to show the whole water column it is thick clutter down to about 200m. You won't get a good bottom read and a totally clear water column with the same settings. Most of the water column out there is of no interest so why decrease the gain and waste screen space displaying it.
I normally have the TVG on medium when moving around at speed and turn it to high when slowing down to sound around. TVG high and boat speed equals too much interferance on my unit.
grayzeee
Posts: 2283
Date Joined: 09/07/09
yeah , high tvg was no good
yeah , high tvg was no good for me whilst moving at any speed either. was using medium . didn't try low tvg at all
i will try setting range closer in , it was set to 100 meters because we were sounding a solid 50 meter vertical wall , but that's sure to help.
If I spent half as long fishing , as I do reading this bloody forum , I'd be twice the fisherman I am.
harro
Posts: 1959
Date Joined: 07/02/08
question on 585
this sounder does support the 1kw tranny doesnt it, you just have to change the output in settings?? am I right,
:::: Bass Hunter ::::
till
Posts: 9358
Date Joined: 21/02/08
The FCV585 does support the
The FCV585 does support the 1kW tranny, you only need the MB1100 for the 2kW jobbies.
grayzeee
Posts: 2283
Date Joined: 09/07/09
yes. correct. in the settings
yes. correct. in the settings , you can choose either 600 or 1kw
If I spent half as long fishing , as I do reading this bloody forum , I'd be twice the fisherman I am.
harro
Posts: 1959
Date Joined: 07/02/08
cheers will the 1kw
and will the 1kw read 200khz deep?, as the 50khz u have to go very slow,
:::: Bass Hunter ::::
till
Posts: 9358
Date Joined: 21/02/08
200kHz just has much poorer
200kHz just has much poorer penetration which is why you go to lower frequency for greater depths.
harro
Posts: 1959
Date Joined: 07/02/08
even with 1kw
yeah last week i run 50/200 with a 600w, the 200 disapeared after 300, would this be better with the 1 kw,
:::: Bass Hunter ::::
till
Posts: 9358
Date Joined: 21/02/08
For sure, you got more power,
For sure, you got more power, but the 50khz ought to show more detail at that depth.
Really not a sounder expert though, where is PGFC when you need him ;)
harro
Posts: 1959
Date Joined: 07/02/08
jamie can u get deals on
jamie can u get deals on reels like the rods mate,
:::: Bass Hunter ::::
buxcey
Posts: 63
Date Joined: 09/04/10
dont waste
your time,you wont find jack shit,spend some money and buy a real sounder
ultimate timber flooring
suppliers of quality timber floors
grayzeee
Posts: 2283
Date Joined: 09/07/09
mate , if i had the dash
mate , if i had the dash space and the money , i would.
i like a challenge though.
If I spent half as long fishing , as I do reading this bloody forum , I'd be twice the fisherman I am.
fisho-ron
Posts: 2539
Date Joined: 26/09/09
hey guysthinking of getting
hey guys
thinking of getting the 1kw in hull wetbox for my hds10, i only go out to 150max atm, im thinking that will change as i said i would never fish the 100+ before.
will it give a better detailed pic in the 40-80's as well?, that is were i spend most of my time, or is it just wasting cash.
cheers ron
Lucky Tim
Posts: 2536
Date Joined: 28/11/07
I did the same (HDS10 and in
I did the same (HDS10 and in hull 1kw M260 transducer) and it was a waste of money yet when I run a Furuno 585 through the exact same transducer it is shit hot. There didn't seem to be much difference between the screen on the HDS with the transom mount tranny or the in hull.
fisho-ron
Posts: 2539
Date Joined: 26/09/09
timare we talking both 1kw or
tim
are we talking both 1kw or was the transom one a 600w?
cheers mate
Lucky Tim
Posts: 2536
Date Joined: 28/11/07
transom one was the standard
transom one was the standard issue 200/50khz 600w transducer.
I installed the M260 in hull shortly after and ran the HDS10 through this but didn't rate it so I put in a 585 through the same transducer and haven't looked back.
glastronomic
Posts: 892
Date Joined: 16/02/11
I just looked it up in my
I just looked it up in my manual regarding frequencies and the depth clarity.
It is the cone width that is the key.
Cone width at 50KHz @100mtr = 83 cone width @200Khz=19
Cone width is 45degrees whereas @200KHz it is 11degrees.
This is from my debtsounder instruction book Navman 4500 which has 50-200KHz and the combination of both.
The other thing to consider is the time factor of the display; bigger debt longer delay.
Narrow cone angle= more detail 200Khz
Wider cone angle = less detail 50Khz.
hope this helps.
P.S. I copied the pages for better explanation then what i typed.
till
Posts: 9358
Date Joined: 21/02/08
Not exclusively a factor of
Not exclusively a factor of the beam width, see my earlier comments about penetration. You do get more detail with 200kHz, but it doesn't penetrate the water column as well. There is apparently a commercial 10kW 200kHz tranny though!
To address the issue regarding beam width, and to bore many with facts and figures, here are some numbers I cooked up last nite. Assume each tranny is mounted on a boat in 200m,
The Airmar TM260
Frequency: 6° Frequency: 200khz Beamwidth: 21m
Frequency: 19° Frequency: 50khz Beamwidth: 67m
The Airmar TM270W
Frequency: 25° Frequency: 50khz Beamwidth: 89m
Frequency: 25° Frequency: 200khz Beamwidth: 89m
Now, this is where things start to get a bit fishy ... You spread the power over a much larger area with a wider cone, so its like less power per m^2 too, but then you get it back over a larger area, like a bigger antenna I guess.
Maybe a bit like this: Inverse Square law
Edit: yes, thats why your sounder manual doesn't make it to the bottom @ 200khz on that manual page.