By Steve Herschbach
This is for novices and the things covered are basic, but very important. I even need to remind myself of this stuff now and then. We all take it so much for granted, that things like loose cable near coil rarely are mentioned on the forum. And coil control? Probably one of the most important factors in success for successful detectorists. People obsess over a detector getting another inch, when so many people could get that just with better coil control.
so the “new to me” atx arrived - mint condition which is great. I have several older ATX coils with various cable faults and wanted to rewire one onto a straight cable. (Do I need a 4 wire and screen cable?)
I wonder if anyone has a wiring diagram at all, or failing that - the original cable has 4 wires and a unshielded screen on the DD coil. Is the screen Actually connected to any of the 4 wires?
I can’t seem to get the “iron check” feature to work on my salvaged coil and guess this may be due to the screen cable?
i know the windings are circa 9ohms and 1.3 ohms
any help appreciated on the DD and Mono wiring.
fyi / had a swing with the atx today - it’s still a great machine!
I've been experiencing lower yields due to sites being detected, by me for sure and there are also signs by others previously. SchoolofHardNox's success on a beach using the Minelab GPX 5000 reminded me to re-read Steve's treatise on using the (in his case original big box Pulsescan) TDI for coin detecting.
I just a few days ago stumbled upon a promising site where extra depth could be key. It's a schoolyard going back at least to 1955. Unfortunately as is the case in many of my public sites, it has a history of backfilling. From aerial photos I see than in the 50's it was grass/sod covered but in the early 60's they put down gravel. The person who told me about the site (a person who walked up to talk when he saw me hunting a nearby park) said he was a student there 45-50 years ago and at that time it was (again) grass/sod. I did a one hour survey hunt with the Minelab Equinox (11" coil) and encountered a couple inch thick gravel layer about 5" down. I did find one Wheatie below the gravel, but 7" is getting deep for my detector + soil mineralization combination so if coins remain from the 50's (pre- gravel layering) then I expect I will do better with extra depth (and that may even be required).
One thing I've found in my detecting of these older sites -- there are always nails present. So even if my TDI/SPP can deliver in the coin category it's going to be signalling on a lot of nails. One of the tricks Steve used was to set the conductivity switch to high conductors (low tones) but the TDI/SPP doesn't have that feature -- I will be hearing both high and low tones. This is a dual disadvantage -- extra tones to have to mentally tune out but also extra threshold noise since both parts of the signal spectrum will be contributing to that as compared to only half when the conductivity-low switch selection is made (on all TDI's except the SPP version).
Here are some specific concerns:
1) Am I fooling myself thinking I can get extra depth with the TDI/SPP, particularly when it comes at the expense of a noisier threshold?
2) Which coil(s) should I be using (choices I'm considering are 6"x8" Nugget Finder Sadie mono, 7"x14" NF mono, and 12" round White's 'Aussie' mono)?
3) Should I flag the promising targets but double check with the Eqx 800 (and if so, should I use the 11" or 12"x15" coil on the 800)? (Note, even if I choose this route I will likely at first dig, regardless of what the 800 says, just to get an idea of what is giving the signal and how deep the targets are.)
Any other advice (from anyone) is appreciated.
I live in Northern Idaho (Moscow) and bought a gold monster 1000. I can't really complain that it is hard to find gold, as I was warned by the Chris Ralph Fists Full of Gold book to not invest in a metal detector right away without prospecting experience. Frankly it was a bit of an impulse buy as the activity just looked like so much fun, and I read books you can detect outside of the desert I really want to make it work. I haven't had any luck so far despite being out roughly ten times. Went out for the first time this season to a placer mine dump.
This time of year there is still snow in the mountains and the rivers and creeks are overflowing with snowmelt. So I think it is better to wait for awhile before hitting creeks and streams and just target old gold mines which have mine dumps. To research I use the site https://www.idahogeology.org/webmap to give me specific gps coordinates. I also use sites like thediggings.com to see if there is any mining activity in the area to make sure I don't go on someone's claim, but also that the area is known to have some gold.
I haven't been able to find too many guys doing detecting in a heavily wooded area with a VLF. Which makes sense because VLF's can't get through the mulch and heavy vegetation layer. Today I went to a lode mine dump and although there were huge piles of dirt I wondered if I would be able to detect any missed nuggets in there unless I was to get the bottom of that huge pile as the heaviness of gold would sink to the bottom. My question is about the application of VLF's in heavily wooded areas. Is it limited to Creeks and Streams? How can the limited depth of VLF's deal with this heavy mulch layer in these placer/load mine dumps in the forest? I'm also curious if my approach is really bad in general. Thanks.