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.
The other day I was detecting on of the many beaches in Santa Monica Bay. Just like all other beaches of the world there are some unique features about it that we all learn. I was thinking about how much sand has been added since a swell event I detected about 6 months ago. I can see where that cut was and I see where the new beach line is and it is 25-30 feet in many places. Our wave pattern with the La Nina has sanded things in. We have earthquakes which raise our plate. How about your beaches from the old days?
Before I started metal detecting I was a surfer. Many natural breaks have been there for years. I'm sure some are gone. Has 'climate change' changed your surfing spots? I know some beaches in Florida have had sand added for replenishment. I just read articles about North Carolina and salt intrusion killing coastal forests. They showed before and after photos.
Do you have any old detecting photos that would show your beaches 20, 30 or 40 years ago?
So, I decided to try another beach to see if the conditions were the same to find silver. I spent about 2 hours there before I could not stand it anymore. For such an affluent town, the have the dirtiest beach I have ever detected on. The amount of junk targets and iron were overwhelming. I could not swing without hitting multiple targets. I got a bit of clad, and an 8-gauge shotgun shell casing, so I flew out of there. 🙄 The drive back to my favorite beach was now the goal to save the day. I wandered around for a bit with no luck, so back to the same area where I did good before. I expanded out a bit and the silvers turned to clad. Lots of dimes as expected, as they are hardest to find deep. Found a decent amount of silver. I did not take pictures of the trash, but here are all the good finds from that beach. My beach days are numbered, as the crowds are already starting to show up well in advance of Memorial Day opening. I may try another new beach next week for a bit and see what happens. Weather was beautiful…. The people ? - a bit strange. 😵
Well kinda (but that's another story)
1 clad dime and 3 memorial pennies , a fishing sinker , an unfired 22 pellet rifle round . 2 1/2 pull tabs and a bunch of tinfoil balls one of which looked like it was turning back to aluminum ore! ( or maybe it was just BBQ sauce ?) and a few odd pieces of iron I haven't washed off yet????? About 3 hours in park1 sens 22 , f2=0 disc = off., the 6" coil on the fully updated 800 Swinging in an old campground (it was root city) I watched being built 60 years ago when I was a little kid 200 yards across the cove through mom's binoculars cuz I was too young to row that far ......somewhere in the wilderness that is the southern Maine coast..I was surrounded by old growth white pine that were protected by the King of England for ship's masts for exclusive use of the Royal Navy....My fave site 30' straight up a cliff from the water ,,,and only covered 1/10th of it. , (It's overlooking "my rock" , where I've been fishing for striped bass since I was 2. It was low tide 2 clam diggahs on the flats , one arrived by boat.........) It was sunny On shore S. <5kts 62* No pics.. I am unworthy. UH AYUH yup yup
I have an easy and maybe stupid question to present now...
Observing my TDI Bh, with both of the coils I own (the original 12" and the aftermarket Detech 8"), I can clearly see way too long wire around the shaft and I'm forced to make several loops up to the control box near the handle.
Supposing to measure the right lenght for the maximum extended shaft, and to cut away the hipmount mile long cable.....Am I doing a disaster or not?
I actually can't remember the technical cable's specs in the amazing pdf Steve posted time ago, but if I'm correct it talked about to reduce some current resistance with a slight performance improvement too...Have I seen a mirage or what?...
I'm not kidding 😜...
It's just me, looking for something to play with, suffering for a missed AQ.