Sweep speed and ground filter, and ground makeup

[OregonMike]

Hi, everyone,

This is going to be hard to do unless someone is willing to make a video...but, I keep reading that your ground filter and your sweep speed are tied together, or at least they should be.

So here's the big question--what would the proper sweep speed be for the 5.0 filter, the 7.5 filter, and the 10.0 filter? Can someone describe it, or if you're industrious, make a video that clearly demonstrates the difference?

Seriously, I keep reading that it matters, so.....what does it look like?

Thanks,

Mike

 

[OregonMike]

Also, I forgot to ask how to decide what filter is best for a given situation. Is it based on the makeup of the ground? Is there an easy way to know what filter is best for a given situation?

Thanks again,

Mike

 

[Larry (IL)]

Your filters, swing speed and ground are all tied together. What is best for you is pretty much trial and error and you really can't go wrong with the factory preset. The next time you get a deep target, or if you have a test bed, play with the different setting and see if one gives you a little better audio or goes a little bit deeper. Ideally, you will achieve both with the right setting. Some people with a very slow swing speed tend to like the 5 Hz and the high or low setting will depend on your ground. I use 7.5 Hz and my swing is fairly brisk, 2 seconds / 5 feet.

 

[jbow]

I find a target a few inches deep and I run through all the different filters while using my normal, semi-slow swing. Whichever filter gives me the best tone is the one I choose. I guess I could try adjusting my swing speed but I am sure Iwould soon revert to my default swing speed.. so I use my normal swing speed and adjust the filter to match it at each site. It will change with the site, sometimes at the site.

Rob's advice to ground balance until the detector is quiet (like pump the coil 20 times) is great advice and you should do that first. I find that usually after that initial GB, the next time does not take as many pumps. I guess because of the autotracking.

Julien

 

[nw1886]

Took me a bit to get the whole filtering/sweep adjustment adjustment thing down with my DFX, (That was one of the main things that gave the DFX punch.) The great thing with the V3 is that it gets decent depth no matter how it's set. But situations change and the other thing about the V3 is it can change to it as no other machine can.

Having said all that...the KISS principle is where it's best to start out to begin that learning curve. That 7.5 is middle of the road and you can simply get decent performance for both deep and slow/fast and covering serious ground in most soil conditions. Use your ground probe function to see what you are up against w/mineralization and EMI. (This "opinion" has a tendency to be a little too safe and can usually be upped a bit as far as your RX gain as electronics don't allow for our ability to decipher past "perfect".) At this point, recognize your machine as having ground conditions covered.

Recovery delay is next. If you are in a trashy area, lower your delay numbers to make the machine ready for that next target quickly. If you are in moderate trash, up it a bit. (This setting is good for covering ground and finding average depth stuff and jewelry.)
If you are in an area that is not trashy, has deep targets and requires a lower sweeping speed, up you delay numbers to allow for a slow, analytical search. Think of using 5 and 12 filters as a future outgrowth in learning to not even worry about now as... you are learning the basic concepts with 7.5. (Read the manual to re-clarify their use.) Little transition learning at this point.

One other thing. I've heard a lot of folks say that the V ground balances itself quickly so...just let it do it. If your in an area where there is deep stuff, ground balance twice/three times. It does make a difference. Hope this helps.

 

[cx3]

Swing speed and ground filters for me relate more to hunting in trashy areas. In trash I use a small coil and I sweep very slow 1ft. per second. For this type of hunting the lowest filter setting works best, 5 Band Pass. Now when you hit areas with less trash you can increase you swing speed and continue to git very good depth even with the small coil.
For general hunting with the stock coil I use 7.5 Band Pass for my setting. With this setting I can swing at a good pace and git very good depth and a clear response. The best way to determine which filter setting to use is to find a deep target in the area you are hunting and go through the filter settings and determine which filter setting gives the best response. HH

Jerry Murphy