Notices
Like Tree2Likes
  • 1 Post By semperfifishing
  • 1 Post By abbor

To CHIRP or not to CHIRP

Old 11-19-2017, 11:41 PM
  #1  
Admirals Club Admiral's Club Member
Thread Starter
 
Join Date: Nov 2017
Posts: 31
Default To CHIRP or not to CHIRP

Hello fellow THT'ers.

I've decided to go with a Furuno FCV-295. I need some help in whether I should go with the 526TIDHDN transducer or a pair of ss175c-HW and ss175c-L. A good friend has recommended that the 526TIDHDN is an all around better transducer.

I have a limited understanding of transducer types so correct me if I'm wrong. From what I understand the FCV-295 Is not a CHIRP specific model, but does allow you to manually select and fine tune the frequency at which to fire the transducer. It doesn't automatically fire through the entire frequency range automatically. Now The 526TIDHDN is a transducer that fires in the 50 and 200khz range. The FCV-295 will give you a slight adjust on either side of 50khz and 200khz but not very far. With the ss175c series you will be able to select all the frequencies along the range of each transducer. Am I understanding this correctly or am I off base? If i am following then I will post a flow up question. Thanks in advance for the help?
BLOODYFUN is offline  
Old 11-20-2017, 02:31 AM
  #2  
Admirals Club Admiral's Club Member
THT sponsor
 
Join Date: Jan 2016
Posts: 7,140
Default

You are correct in your thinking. The Chirp ducer on a non Chirp Sounder will still be able to take advantage of the increased sensativity of the Chirp ducer.
InternationalMarineBrian is offline  
Old 11-20-2017, 06:26 AM
  #3  
Senior Member
 
Join Date: Feb 2015
Posts: 245
Default

Comparing a B260 and SS175 is tough to do.

One is a faring block type and one are flush mount.

One has a very narrow beam angle one has a very wide cone angle at the high end.

what kind of boat do you have?

What kind of fishing do you mainly focus on?
mfeen1 is offline  
Old 11-20-2017, 06:36 AM
  #4  
Admirals Club Admiral's Club Member
THT sponsor
Marine Advertiser
 
Join Date: Oct 2009
Posts: 21,722
Default

If using a FCV295 I would opt for the CHIRP ducer.

Airmar News Release: CHIRP Transducer for non CHIP units.

Airmar news release about CHIRP and a FCV295.


.
davepjr71 likes this.
semperfifishing is offline  
Old 11-20-2017, 08:26 AM
  #5  
Admirals Club Admiral's Club Member
Thread Starter
 
Join Date: Nov 2017
Posts: 31
Default

Originally Posted by mfeen1 View Post
Comparing a B260 and SS175 is tough to do.

One is a faring block type and one are flush mount.

One has a very narrow beam angle one has a very wide cone angle at the high end.

what kind of boat do you have?

What kind of fishing do you mainly focus on?
I have a 26 foot tarheel all aluminum boat. Top speed is 22knts. Trolling at around 8-12 knts. I would say I do trolling and bottom fishing equally the same. We drop off pretty quickly here. So the shallowest water would be around 300ft going down to about 2500ft.
BLOODYFUN is offline  
Old 11-20-2017, 09:30 AM
  #6  
Senior Member
 
Join Date: Feb 2015
Posts: 245
Default

I would suggest not going with the large faring block style..

My suggestion would be Flush mounted tiltied element.

So either ss164 or ss175 (pair).

I would not get the b175HW if you plan on bottom fishing in those depths.Although a geat ducer fro trolling, jigging and popping. Not the ideal choice for bottom fishing with its supper wide cone angle.

@50ft the SS175HW cover 22 ft of bottom. So at 500 ft you are cover 222ft of bottom. meaning you might be way way off the wreck you want to be on even though you are seeing it on fishfinder...

My suggestion would be a SS175 LOW and SS175 HIGH (NOT HIGH WIDE MODEL)
mfeen1 is offline  
Old 11-20-2017, 09:43 AM
  #7  
Senior Member
 
Join Date: Feb 2005
Location: Norway
Posts: 14,021
Default

I wonder why B175L is good for bottom fishing at 1500', while B175H-W with the same cone angle is not usable for bottom fishing at 500'

To me the wide 50 kHz or Low CHIRP cone angles don't make sense. The problem is physical size and cost. The 2 and 3 kW Airmar transducers are available with cone angles less than 10 degrees.
BCTony likes this.

Last edited by abbor; 11-20-2017 at 09:49 AM.
abbor is offline  
Old 11-20-2017, 10:12 AM
  #8  
Senior Member
 
Join Date: Feb 2015
Posts: 245
Default

Originally Posted by abbor View Post
I wonder why B175L is good for bottom fishing at 1500', while B175H-W with the same cone angle is not usable for bottom fishing at 500'

To me the wide 50 kHz or Low CHIRP cone angles don't make sense. The problem is physical size and cost. The 2 and 3 kW Airmar transducers are available with cone angles less than 10 degrees.
Well a B175L and B175HW although similar do not have the same cone angle.

I would much rather have a narrow beam angle for my high end, to not only know if you are over the piece you want to fish. But also for the improved bottom detail and target separation off the bottom.

Wide angle transducers have the ability to miss fish hanging tight to bottom in and around structure. They also smooth out the edges of wrecks and bottom making it hard to distinguish some features of the bottom you are fishing.
mfeen1 is offline  
Old 11-21-2017, 09:29 PM
  #9  
Senior Member
 
Join Date: Nov 2012
Posts: 290
Default

The Chirp Transducers will definitely give you a better shot, if you can afford two transducers, I would recommend the SS175H and the SS 175L. If I had to chose one, it would probably be the SS175M. If you spend a lot of time fishing in less than 300’ I would go to the HW and combine it with the L.

I fish from 20’-500’ for Salmon, and 300-1000’ for bottom fish and
I’m running the SS175HW and the SS175M with great success.
Salmonter is offline  
Old 11-22-2017, 04:06 AM
  #10  
Admirals Club Admiral's Club Member
 
Join Date: Apr 2011
Posts: 2,025
Default

Sub'd
duke460 is online now  
Old 11-22-2017, 04:58 AM
  #11  
Senior Member
 
Join Date: Feb 2005
Location: Norway
Posts: 14,021
Default

Originally Posted by mfeen1 View Post
Well a B175L and B175HW although similar do not have the same cone angle.

I would much rather have a narrow beam angle for my high end, to not only know if you are over the piece you want to fish. But also for the improved bottom detail and target separation off the bottom.

Wide angle transducers have the ability to miss fish hanging tight to bottom in and around structure. They also smooth out the edges of wrecks and bottom making it hard to distinguish some features of the bottom you are fishing.
B175L has 21-32 degrees cone angle, with CHIRP the effective cone angle is the one of the center frequency of the CHIRP. B175L has then 26.5 degrees effective cone angle in CHIRP mode which is very close to B175H-W.

I agree a narrow cone is an advantage for bottom fishing, this is the reason why I'm recommending B175M and not B175L for bottom fishing at 1000'. My point is that B175L has a far too wide signal cone, the 2 and 3 kW CHIRP transducers is what people should by if fisfuing at 1500' and deeper.

A B265LH is also a better alternative than B175L, B265 has 16-25 degrees bandwidth.
abbor is offline  
Old 11-28-2017, 12:49 AM
  #12  
Admirals Club Admiral's Club Member
Thread Starter
 
Join Date: Nov 2017
Posts: 31
Default

I have been speaking with some local fishermen and some local electronic installers to further my education. One of them told me that I'm better going with the B206 (in Stainless Steel 556TID-HDN) for our water in Hawaii. At first I was caught off guard by him saying "Our Water", but the more I though about it the more I realized that the makeup of the ocean water differs in different areas of the world. What is the forums thoughts on that statement? Can the differences be that notable in the fish finder arena?

What would be the downside of mounting one of those large fairing block transducers on my 26 foot boat. Im thinking it is going to have an effect on the hydrodynamics of the hull, but Im not sure. Wouldn't the fairing block take care of most of that. Also, If the mounting area of the transducer has 0 degree of deadrise, can you mount the transducer without the fairing block or is that highly not recommended?

Thanks Again,
Cliff
BLOODYFUN is offline  

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are Off


Thread Tools
Search this Thread