Having tried the DF when it came out I found there was no way I could achieve the depths claimed on many of the forums.
I was approached by a P.I. user of more than tens years experience and he thought he must have bought a lemon. By the time a third owner turned up at my local beach thinking as it was his first pulse he must be doing something wrong (he had seen the "consistantly finding coins at 18 inches" posts) I decided to use test items pushed down into the liquid sand as the tide retreats, let the sand harden then test for depth.
I use a length of the click together plastic plumbing pipe. Cut a slot down its length to avoid having to thread wet string down the tude. The use a disc of ply with a string knotted through the centre for rings or a cats cradle of string round a small ply disc with a smear of blue tack to hold the test coin in place. Use tube to push test item into the sand, pull tube out and pull sufficient string out so that the item remains at the required depth.
Result of this...still nowhere near the depths being quoted. Running the detector hot or not seems to make little difference. Running the threshold higher than I would with other pulse machines gave a little more depth on larger items but lost depth on fine gold and those childrens silver rings that are little more than a twist of wire.
Having had the worse flu I've had in years (a month+) then following on with being trapped by snow for three weeks it gave plenty of time for thought. Most of the U.S. reports are from Florida. If I tried to use a Mac 1 Turbo or Aquasound on Welsh beaches I would not get a fraction of the performance they manage in Florida. Though they are VLF they do illustrate the lack of black sand and mineralisation in that part of the U.S. This suggests that the Whites doesn't cope to well with British conditions even with its adjustable pulse delay.
A third machine was pressed into use but this time as coin depths on U.S. forums had increased from 18 to 20 inches I decided to try seperating the lower shaft and coil from the rest of the machine and using the shaft as a handle with the coil edge down into a salt water pond on the beach. So my wife held the coil upright and I froze my hand off sweeping coins and rings underwater at set distances. A improvement in depth but still nothing compared to the U.S. figures even though by testing sideways any mineralisation effect should have been eliminated.
Anything likely to mean these tests have no value ? No metal anywhere near, all metal types tried including U.S. coins and both U.S. and U.K. rings used so all carats tried.
I was approached by a P.I. user of more than tens years experience and he thought he must have bought a lemon. By the time a third owner turned up at my local beach thinking as it was his first pulse he must be doing something wrong (he had seen the "consistantly finding coins at 18 inches" posts) I decided to use test items pushed down into the liquid sand as the tide retreats, let the sand harden then test for depth.
I use a length of the click together plastic plumbing pipe. Cut a slot down its length to avoid having to thread wet string down the tude. The use a disc of ply with a string knotted through the centre for rings or a cats cradle of string round a small ply disc with a smear of blue tack to hold the test coin in place. Use tube to push test item into the sand, pull tube out and pull sufficient string out so that the item remains at the required depth.
Result of this...still nowhere near the depths being quoted. Running the detector hot or not seems to make little difference. Running the threshold higher than I would with other pulse machines gave a little more depth on larger items but lost depth on fine gold and those childrens silver rings that are little more than a twist of wire.
Having had the worse flu I've had in years (a month+) then following on with being trapped by snow for three weeks it gave plenty of time for thought. Most of the U.S. reports are from Florida. If I tried to use a Mac 1 Turbo or Aquasound on Welsh beaches I would not get a fraction of the performance they manage in Florida. Though they are VLF they do illustrate the lack of black sand and mineralisation in that part of the U.S. This suggests that the Whites doesn't cope to well with British conditions even with its adjustable pulse delay.
A third machine was pressed into use but this time as coin depths on U.S. forums had increased from 18 to 20 inches I decided to try seperating the lower shaft and coil from the rest of the machine and using the shaft as a handle with the coil edge down into a salt water pond on the beach. So my wife held the coil upright and I froze my hand off sweeping coins and rings underwater at set distances. A improvement in depth but still nothing compared to the U.S. figures even though by testing sideways any mineralisation effect should have been eliminated.
Anything likely to mean these tests have no value ? No metal anywhere near, all metal types tried including U.S. coins and both U.S. and U.K. rings used so all carats tried.
uke: