Scavenger
Full Member
- Joined
- Jun 21, 2006
- Messages
- 176
I constructed a MD test ground by leveling a patch of dirt on a gentle slope of about 1in4 grade. This was done with wooden cribbing and thereby provided a vertical face to insert objects.
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I buried four 1 1/4 in. sections of PVC pipe each 28 inches long the underground end was sealed with a wooden plug with a small drain hole. The pipes entered at an angle that went from 0 to 10 ins. in depth from the leveled surface. I had considered horizontal pipes at different depth increments, but opted for the slanted tube because the depth could be easily adjusted and fine tuned.
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Therefore I can test 4 different coins at the same depth, or the same coin at different depths simultaniously. The test sticks are 3/4 in. square and have a shallow circular depression at the end to receive the coin, which is secured with rubber bands. Eventually I want to have a wide rubber strip like a cross section segment of a very narrow bicycle tube to form a pocket for the coin. The important thing being not to have the target fall off in the bottom! The sticks have holes at the inch marks where a stop is inserted.
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I have just really started to experiment with settings on my DFX, but it should help in testing the settings.
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While the absolute depths may not reflect field conditions, they will provide a measurable relative comparison. I'm sure there are many different ways for this kind of testing, suggestions would be welcome.
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I buried four 1 1/4 in. sections of PVC pipe each 28 inches long the underground end was sealed with a wooden plug with a small drain hole. The pipes entered at an angle that went from 0 to 10 ins. in depth from the leveled surface. I had considered horizontal pipes at different depth increments, but opted for the slanted tube because the depth could be easily adjusted and fine tuned.
[
Therefore I can test 4 different coins at the same depth, or the same coin at different depths simultaniously. The test sticks are 3/4 in. square and have a shallow circular depression at the end to receive the coin, which is secured with rubber bands. Eventually I want to have a wide rubber strip like a cross section segment of a very narrow bicycle tube to form a pocket for the coin. The important thing being not to have the target fall off in the bottom! The sticks have holes at the inch marks where a stop is inserted.
[
I have just really started to experiment with settings on my DFX, but it should help in testing the settings.
[
[
While the absolute depths may not reflect field conditions, they will provide a measurable relative comparison. I'm sure there are many different ways for this kind of testing, suggestions would be welcome.