Frequencies

[Terry in PA]

Most all the Garrett detectors being somewhere around the 6 or 7 kHz . It seems the trend with most all the other detector companies is to use a higher frequency on there new line of detectors like 15kHz which is to get deeper ground penetration. But is not as sensitive to higher end targets like silver. Do you think Garrett will go this way with a new detector or find away to better punch the 7kHz into the ground? They made a great improvement with the power master chip a few years back. With the pace of electronics today there has to be more they can do with the VLF signals.
Happy Hunting

 

[swingman]

I thought that higher frequencies give better resolution of small targets, and lower frequencies give more depth. Any confirmation, either way? I know the 2500 is adjustable within a narrow range.

 

[NM5K]

I'm really not too sure, but I would think the lower
freq's would have the greatest overall depth through
the earth. Seems like a read somewhere that certain metals
respond a bit better at certain freq's, than others.. IE: gold
But I haven't looked into it much, and don't nugget hunt around
here. I imagine garrett has done loads of testing in various grounds,
and came to the conclusion the 6-7 khz range was a good overall compromise.
So I don't see any radical departure anytime soon. Probably
more of the variable freq boxes will come out though in the
future. The ace 250 I have is 6.5 khz, and I'm in no rush to
run out and get a 15 khz machine... 6.5 khz seems to do pretty well.
MK

 

[ernied]

i think Garrett made a 15kHz detector back in the eighties or nineties called the ground hog i had one it was the old VLF tr great coin machine back then.

 

[Uncle Willy]

They still have one - the Gold Stinger.

Bill

 

[Terry in PA]

Yes I forgot that one ! Why do you think alot of newer detectors are going with those higher frequencies ?

 

[Hightone]

Lower frequency penetrates deeper with more accurate target ID. Higher freq's detect smaller treasures and gives better separation since the wave is smaller. Gold detectors operate anywhere from 15khz to 60khz. They can detect small gold dust, but has a problem IDing a quarter at 6 inches. The 5 to 9KHZ range may miss anything smaller than grass seed, but will lock on to dimes and larger. PI's have less depth, harder to ID, but is not affected by mineralized soil.