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What detectors, old and new, had surface blanking?

Mike Hillis

Well-known member
n/t
 
Think my old garrett gta-1000 has something called surface elimination as one of the options...i never found a use for it though..
 
I remember one of the old Bounty Hunter Time Ranger versions had surface blanking.
 
Surface blanking came in handy when looking for gold rings. Most pull tabs are very shallow, gold being very heavy tend to sink. Found several gold rings this way. I like surface blanking....Jack
 
i will add to the list or repeat --- the Garrett CXlll / Garrett GTI 2500 Tesoro Royal Sabre , GTA 1000, Time Ranger , BIg Bud Series
 
Several older Garretts had surface eliminaton to 4" if I remember correctly...
 
My Garrett Grand Master Hunter CX 111 w/treasure talk has the surface
elimination just like Elton said. When the boost is engaged this machine
seems to really PERK up in depth with solid responses. Just picked her
up not long ago with every available coil for such a deal and the Big Garrett
bag came with it.Even came with the Bloodhound coil (2 box).
Tesoro also had a machine that had the blanking feature as I believe
it was a way earlier model from possibly the 80's if I remember right.
silverseeker 2
 
I can certainly understand the concept of "surface blanking" and maybe while on some types of searches it can aid in "cherry-picking" those sites.? My only problem overall with "surface blanking" is since I started detecting some of my good/better finds(both old and new) were found in the upper strata. Ha!
 
I was just reading the Deus manual, and it has 4 levels of surface blanking. I think it said it was used in real trash spots and prospecting to miss hot rocks.
 
Surface blanking should not be used in areas that are not hunted to death.Surface blanking is best used in areas that everyone thinks is hunted out. Also is good for finding deeper coins in a lot of trash avoiding newer coins.....Jack
 
Compass Coin Magnum had a crude blanking system. This was a VLF discriminator made in the late 1970s.
Garrett GTA 1000 pre-Powermaster had 1" blanking. The Powermaster GTA/GTAX 1000 could be adjusted 1-4" just like the top end GMH CX III variants.
Garrett GTI 2000/2500.
Tesoro Royal Sabre.
Bounty Hunter Big Bud had a 3" blanking feature for 'old coins' selection. Big Bud Pro was 1/2" to 4". Then followed by the Big Bud Pro SED,Bud Select 220 analog and digital. Also the Time Ranger.
 
All metered detectors have surface blanking. Just watch your depth on the meter and only dig targets that are deeper than the shallow targets you want to eliminate. Much better than being totally blanked out, in case you get a target that is shallow that causes you to wonder if it might be good. Instead of not hearing a signal at all, and never knowing you possibly walked over a good target. Mark
 
There was a misconception when that feature came out on a few machines, that perhaps still exists: That you are somehow "seeing through" to eliminate masking. Ie.: if you'd "blanked" the shallow top loud stuff (a tab or clad at 1 or 2 or 3"), then you could magically get deeper coins underneath them. That is: to see through and *only* get the deeper coins, that would otherwise be masked by iron, tabs, foil, etc....

But it didn't work this way. All it did was blank on loud targets. If there was a deeper older coin underneath that, it was still masked. You could accomplish the same thing by simply mentally ignoring loud signals. Also it was a pain in the b*tt anyhow: Because whenever you'd capture the fringes of a shallow signal (the momentary off-centered tip of larger targets), your machine would get a signal. When you'd go to try to isolate, (center over the target better), it would disappear. Hence being a confusing mess of signals. You were/are much better off just to let your ears do the deciding.
 
TELL_M TOM, everyone wants something that only finds what they want. I like to detect and what I find is what I find. If there were detectors that did just find the good, there would be no more good to find. I take it all. The GOOD, BAD, and the UGLY.
 
Thank you to everyone that contributed.
That gave me a good list of machines to review.

HH
Mike
 
Since there are some machines that give a numerical depth readout while in motion, it would be interesting if a manufacturer could implement a notch system based on those numbers. That way any depth level could be notched in or out. I can see Tom's point though, it could get confusing and certainly wouldn't be foolproof, but if they could add a control that would allow the system to be turned on or off at the quick press of a button, it just might work to some degree.
 
What I have noticed in our area MR.W is there are a lot of pull tabs in the 6" level and some even deeper. It might be pretty hard to eliminate down to those depths and still get good hits.
If maybe a size hit on targets could be developed say smaller than pieces of tabs and junk items could be eliminated ..might be something good for consideration. The F70 does that to a degree using the dual threshold settings.. So I think it might be possible..
 
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