How high can I run the disc on the F75 LTD without running the risk of missing some nice gold?

[jbow]

Yesterday I was at a churchyard, mostly digging clad and a few wheaties. Got a button, a couple of rivets, and a pin of some sort. I tried to use a V3 but it was just frustration. I tried my Sovereign and it worked fine but was a bit heavy and I didn't feel like chestmounting it. Used the E-TRAC for a few minutes but I guess Ireally wanted to use the F75 because I got it out and spent most of the time with it. I had used it there before and it works really soild for me on that site (except for right under the powerlines). Anyway, I used BP the whole time but tried different tone settings and disc levels. I found a sensitivity in the 80s to work well but with a lower disc setting I got a lot of chatter from iron and minerals. Going up to 6 helped and worked fine if I hunted in 2F or 3 or 4 tones. I prefer either 3 or 4 tones because I like for a nickel to give me a mid tone, I find it makes them easier to find. The most stable setting was 1 tone with the disc raised to 20. It was quiet and most signals were worth digging. Later though I got to wondering if I was risking missed gold jewelry with the disc on 20. I checked the manual and it says most iron is 12 and under and foil runs from 16 to 25. Since I like running in 1 tone do you think setting the disc on 13 or 14 will bring in most jewelry and still not signal most iron and minerals?
Sometimes I can stand all the noise and will run 2F or 3 tones with either 0 or 6 disc. I almost always ran my original on disc-6 and 2F tones... but like I said I am finding that I really like 1 tone. It gives a good soild signal and a good TID number but not if you have to listen to everything. Sometimes I will use AM but not everywhere... sometimes there are too many signals and with age I can only look down at the angle required to watch the screen for so long before I get a neckache and backache.

So back to the original question... how much disc do you find is just right for hunting in disc and 1 tone?

Also if you want to answer... I asked a question over on the Teknetics forum about why some people like the T2 better than the F75 for coin hunting. I don't understand this since the F75 has an expanded TID range in the upper numbers where most coins read... I like me T2 but I like my F75 better but both will find targets. They say that the F75 is deeper but most everything I was finding yesterday was at the 4 to 5 inch range. A few were 6" but very few... I think it is just where the targets were... not any problem with the machine. This F75 LTD is greally beginning to grow on me. I have spent way too much time trying to like the V3... it has become a job, I am going to try a little longer to learn to understand it but if I don't get a breakthrough soon I will be finished with it. Life is too short to make frustrating work out of a hobby.

Thanks,

Julien

 

[Neil]

Julien I hunt my F75 mostly in all metal motion mode but when I use the disc I keep it set at 7. Ive tested the jewelry I have on it and Ive got some earrings and chains that you loose at a disc setting of 10. I guess it depends on how small jewelry you are after. In all metal mode I dig 10 and up and dont bother with dimes or quarters unless they are really shallow.

 

[jbow]

I got an answer on why some like the T2 for coin hunting better than any other machine. The reason was setting the disc on 40 quitens it to all iron and foil and all the coins sound off well. This seems to translate to setting the F75 disc to 25 for quiet coin hunting but I haven't tried it, 20 seemed quiet enough BUT... I can hardly stand the thought of missing a ladies diamond ring. I might have said this but I have traditionally hunted with the disc on 6 and ont of the multi tone settings but I am really liking 1 tone and I like AM if there isn't just much going on.
I have a 1830s site where a house and an office have burned, there was a large CW cavalry camp, and there is a house that was built in 1906 still there. (this is irrelevant but the current house was built by Robert Trent Jones aunt and i've found at least one of his toys, he being the only child known to have ever been there. A WWI cast soldier) Anyway it is way littered with iron, square nails, and every sort of trash you can imagine. I am going to try the lTD there with high sens and 0 disc to see what else I can pull out of the yard that way. I hear that the LTD will ID even more goodies mixed in iron with the disc on 0 and the sens turned high... probably try the small coil too. I'll post about it when I get to it... hopefully this week.

Thanks again,
Julien

 

[Jackpine Savage]

Julien perhaps the boost process wasn't right for the church site you hunted. The combination or iron and targets mostly falling in the 5-6" range tells me (admittedly I have not used an LTD) that the De process might be the better choice. Use just enough iron disc to quiet the iron, raising it beyond the small iron setting only if necessary to help with any EMI that might be present. It's possible that De process will allow you to run a lower iron disc setting in 1 tone vs. BP and 1 tone (?) Don't know that for sure as like I said I have not used the LTD's.

Jut a thought

Tom

 

[Cal_Cobra]

I'm not sure setting the disc to 25 will quite it down as much as you suspect it will because running the disc at 21 and higher kicks it into it's extra sensitivity mode.

Last fall I did quite a bit of experimenting with my F75 LTD for hunting gold jewelery and I found the following settings to work great: BP mode (makes smaller gold look BIG to the detector), 2F tones, 7 disc and sensitivity at where your comfortable with. The key for me was the combination of BP mode and 2F tones. I was hunting a fresh water lake and running 2F tones and found a chain 4" deep that no other audio mode would sound off on (aside from possibly monotone, which admittedly I haven't tried and would prefer not to use) but 2F sounded off loud and clear. I run this same setup for fresh water beach or tot-lot hunting, and it really nails the goodies (as long as their there to begin with). Tom Dankowski has indicated from his testing that 99% of small gold rings are going to ID at 22 and above on the LTD, so I think with a disc setting of 21 you'd be OK to get most gold.

Brian

 

[chuck ky]

40 should only get rid of the iron. most of the foil i see comes in around 43. the biggest gold ring i found lately was a 55 in a bag full of leaves. of course i newe it was probably in one of the bags so i was checking all signals.

 

[jbow]

Thanks. When I cleaned up some ofthe pennies one was a 1917 and one a 1914. Two were from the 1950s. the ground here is hard clay and gets harder aseveral inches down. Depth usually isn't an issue, seperation is!

Anyway, I liked the way it was working I just don't want to lose jewelry. The chatter wasn't any worse than the originall F75 with the disc on 6 or on 0, I am used to that but in one tone it becomes a little bothersome but one tone in BP is awesome and with the disc on 20 it is very stable. I can still run 2F or other tone settings with the disc on 6 or on 0, especially with the small coil. When I first got the F75 LTD I went to a place that is notorious around here for bad mineralization and the area I was in had underground utilities about 20' away and hight tension powerlines about 30yds away... I was able, with the small coil to run it on 0 disc and sens 99 and I had to check several times to be sure it was actually working... because it was so quiet... but it would hit my "ground shark" at 3' so it was working well... just very quiet. The LTD is a good machine and BP is awesome.

J

 

[jbow]

Try setting the disc at 20 and using 1 tone. I found it to be very quiet and BP sounds off really good. I'd like to know what you think... unless your place has lots of aluminum trash.

J

 

[kered]

The last gold i had with the f75 was a nice 18k bracelet it came in at 17 and was in the dry sand, i nearly passed on it, i run on 15 mostly to cut out only the iron(booby pins etc)

 

[jbow]

Thanks... I think 15 will be a good number for quiet enough operation to run 1 tone without having to work so hard.

J