SONAR HELP

JRD Posted 3/28/2005 7:36 PM (#30244) Subject: SONAR HELP I am looking to buy a sonar unit and have notice lowrance offers units with 2400 and 4000 watts of power. I will be walleye fishing in 40 feet of water or less is there any benefit to the higher power units at that depth? Gordy Posted 3/29/2005 6:35 AM (#30255 - in reply to #30244) Subject: RE: SONAR HELP Member Posts: 279 Location: Rockford MN In shallow waters like you are fishing, the 2400 watt units are fine. Remember that this is just a peak to peak power rating. Pixels are the most important thing, more pixels the better! The color units like the X-102 Have every option you could ever use, and is priced at $500. The 102 has a very good pixel count 480x480 with a super bright screen. I would consider the higher power only if you fished alot of Greatlakes for Salmon where you might fish the 100' plus waters. You will love this unit and find it hard to even look at a grayscale unit after owning a color unit. Good luck! mn_mike Posted 3/29/2005 9:00 AM (#30267 - in reply to #30244) Subject: RE: SONAR HELP New User Posts: 4 Just to highlight a little bit more about the termnology used. Like mentioned some ratings are advertised at peak-to-peak, mostly because it is a higher value; while others are "rms" values which means "root mean square." This value is simular to an average power or an amount of power that can continuously be seen by a source. Example: 4000 watts peak-to-peak is ~1414 watts rms. You get this by dividing the peak value 2 and then multiply by 0.707 (1/sqr root 2). This is something to be aware of when comparing specs on electronics. Hope this helps. mn_mike Edited by mn_mike 3/29/2005 3:59 PM