Humminbird Side Imaging Forums

Other Interest => DIY - Side Scan Sonar and towfish => Topic started by: Roddy on April 12, 2011, 01:10:45 PM

Title: Max Depth: Has anyone mfg a sys to go 450-500' depth?
Post by: Roddy on April 12, 2011, 01:10:45 PM

Just rec the 300' ext for the cctv in TF#3. It's raining today. I have 2500' CAT6 cable. Off to the work shope! ;D >:D Roddy

Title: Re: Max Depth: Has anyone mfg a sys to go 450-500' depth?
Post by: Rickard on April 21, 2011, 04:17:29 PM

Roddy,

As you must have noticed by now, nobody has tried with a 450' extention and got presentable results. The reason is most likely the expected very high attenuation in such a long cable, the screen will show noise, and that's it. The longest functional cable, confirmed with images, I'm aware of is our french friend Abra's 60 m (180') "space technology cable".

Regards,
Rickard

Title: Re: Max Depth: Has anyone mfg a sys to go 450-500' depth?
Post by: Roddy on April 21, 2011, 05:26:32 PM

Thanks Richard; I have got to try it. Maybe MFG a filter/amp or something.  >:D There are too many nice wk around Charleston,SC. USA to look at. Roddy :) >:D

Title: Re: Max Depth: Has anyone mfg a sys to go 450-500' depth?
Post by: Rickard on April 21, 2011, 05:36:40 PM

Please, try it!

But manufacturing an amplifier seems difficult. I have asked people for years to come up with a device that can survive the 1000 V transmit voltage and amplify the millivolt receive signals.

Rickard

Title: Re: Max Depth: Has anyone mfg a sys to go 450-500' depth?
Post by: Roddy on April 22, 2011, 12:33:43 AM

If the Navy can get high power sonor why can't I !!! Roddy >:D

Title: Re: Max Depth: Has anyone mfg a sys to go 450-500' depth?
Post by: Rüdiger on April 22, 2011, 03:13:09 AM

Hey all  :)

Is it possible to create a booster between the unit and the transducer ?

mvh
Rüdiger

Title: Re: Max Depth: Has anyone mfg a sys to go 450-500' depth?
Post by: sonar2000 on April 22, 2011, 09:40:50 AM

Roddy, the Navy units cost a whole lot more than the HB stuff.
If we really are serious about side scan then it is the bucks that do the job...
Chuck

Title: Re: Max Depth: Has anyone mfg a sys to go 450-500' depth?
Post by: Roddy on April 22, 2011, 11:04:47 AM

Rudiger; Booster/amp/filter I'am going to give it a shot! It looks good   on paper.

Chuck; I do not have to pay off everyone in DC to get the job done!    Enjoy All  Roddy >:D