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Coil Cover
- Thread starter oceanan
- Start date
Cameraniac
Active member
Could you, please, elaborate upon your statement?adamBomb said:
Keep it on- its there to protect the coil from abrasion. Covers are cheaper than coils to replace.
Remember to periodically take the cover off to clean out the inevitable sand that collects inside. This is particularly important in areas where ferrous particles are in the sand (this may be the source of someone saying loss of depth with leaving it on, but that's just speculation. I cant imagine it would affect it very much even in the worst case scenario).
Remember to periodically take the cover off to clean out the inevitable sand that collects inside. This is particularly important in areas where ferrous particles are in the sand (this may be the source of someone saying loss of depth with leaving it on, but that's just speculation. I cant imagine it would affect it very much even in the worst case scenario).
GeorgeinSC
Well-known member
I would leave it on. That sand is like using sand paper on the coil if you keep the coil close to the sand. One can not keep from sliding the coil over the sand from time to time. Without a cover you could eventually wear the coil until it would leak.
I take the coil cover off my Excal after every trip to the beach and wash the accumulation of sand off the coil and cover.
I also remove the lower shaft and wash it and the inside of the upper shaft. A stuck shaft is not fun.
I take the coil cover off my Excal after every trip to the beach and wash the accumulation of sand off the coil and cover.
I also remove the lower shaft and wash it and the inside of the upper shaft. A stuck shaft is not fun.
Cameraniac
Active member
The coil cover can also be cleaned out during hunting. Only takes a minute to do.
dewcon4414
Well-known member
Its like speaker comparison...... most of us wont even notice a depth diference. Throw that coil cover a way if you want......... but i was going thru one ever 4 or 5 months until i started using marine epoxy on the bottom of them........ so what do you thank in a year my coil would look like? As far as depth loss...... most people hunting the beach i watch loose a heck of a lot more depth by not having proper coil control...... i mean the golf swings 3 or 4 inches off the sand is going to miss everything but the big gold and change. TESTING.... well that can be as unreliable as a guy saying he got 30 inches on a nickel at the beach......... ya right improve your PPing.
Dew
Dew
Daddy said:
Here is a quote from NASA Tom in this thread. He seems like one of the most knowledgable guys on MD out there: http://www.dankowskidetectors.com/discussions/read.php?2,703,779
I do NOT like coil covers..... to put it bluntly. Some detector coils are cheap/brittle....and require a coil cover. As for the Fishers (and newer Minelabs) , the epoxy coils are very durable.
FIRST: Let me say this; A coil cover is approx 1/8" thick. This means that the coil will additionally be held off of the ground 1/8"...... and will reduce detection depth by 1/8". ----Negligible performance loss.
SECOND: It is very standard that the coil cover will NOT install so perfectly.... so as to give zero gap between coil and coil-cover. On average,,,,,, the gap between coil and coil cover is also approx 1/8" air-gap. NOW......... This means that the coil will NOW be (at minimum) 1/4" above the ground....... resulting in a 1/4" reduction in depth performance. (1/8" coil cover thickness + 1/8" air-gap = 1/4"winking smiley. A 1/4" loss of detection depth is more than just "negligible". It hurts...... as the type of coins & relics we are hunting are at the deeper depths..... and the 1/4" loss of detection depth is ONLY at the DEEPER depths...... the area of detection that we MOST want to ascertain.
THIRDLY: You now have a 1/4" detection depth reduction/loss induced by the installation of a coil cover,,,, BUT....... Now,,, couple this UNWANTED situation with: having the inevitable mineralization/dirt/grit/sand/water/salt-water added into this air-gap...(between/inside the coil and coil cover) subsequently....with this mass of mineralized dirt "sloshing" around inside that coil cover. BAD, BAD, BAD!!! Who knows how much additional depth & performance loss is (now) induced. Your buddy hunting without a coil cover .... has the 'trump' card.
I can NOT tell you how many times I have found valuable targets that could only be ascertained by "scrubbing" the coil. Lifting the coil just 1/8" off of the ground... and I would have COMPLETELY missed COUNTLESS valuable targets. God forbid I had a coil cover installed...with sloshing mineralization/dirt and a 1/4" induced air-gap between me and DEEPEST of targets..... the ones that I want THE MOST!
In Summation/My philosophy: I am MORE than willing to "wear out" a coil ..... "forcing" me to replace a coil every few years.... rather than forfeiting the deepest of targets due to the installation of coil cover. Save the money from the coil cover and put it towards a new coil when the old one fails.
---Truth be known.... I have YET to replace the original 15-yr old CZ coil... and I "SCRUB" the ground religiously! Do NOT miss the deepest of targets.
Tom
Cameraniac
Active member
Thank you for elaborating, adamBomb. Still, I think I'll leave the cover on my Excalibur becaus changing out a coil on it can be quite costly.adamBomb said:
I don't know about the "sloshing" inside a coil cover that Tom talks about. Everytime I take mine off after a beach hunt, that wet sand is PACKED in there.
I think from the responses I am reading here, how you swing should be taken into consideration. If you swing where you never scrub the ground, you don't really need a cover, but if you rub the sand during 100% of your swing, you better have one or youre buying a new coil shortly. And all gradations of that in-between those extremes.
I think from the responses I am reading here, how you swing should be taken into consideration. If you swing where you never scrub the ground, you don't really need a cover, but if you rub the sand during 100% of your swing, you better have one or youre buying a new coil shortly. And all gradations of that in-between those extremes.
GeorgeinSC
Well-known member
Dew there you go educating those that swing a coil like Tiger Woods drives a ball. I love seeing those guys at the beach. I know that they miss 99% of the targets and that leaves lots of targets for me to find. They also usually walk pretty fast and only cover a small portion of the beach.
dewcon4414
Well-known member
Kin..... exactly. I like to see the sand fly and I believe Tom Is saying the same thing. Keep the coil low then think..... is that 1/8th inch worth wearing out a $200 coil?
Overvoltage
New member
adamBomb, I hate to debunk your theory but I don't know of any coil covers that are 1/8 inch thick. My factory Minelab coil cover is 1/32" thick and the air gap is no more than that. So in reality you are only talking 1/16" and if 1/16" means hearing a good target or not then you are so close to the fringe you are most likely missing some just by imperfections in swing and high and low spots in the ground.
Overvoltage said:
You should do a few tests with and without the cover to see how it really affects your machine, especially when those signals are faint on deep targets. If it makes no difference than why not have one? Nasa tom seems like one of the most experienced and knowledgeable guys out there so I tend to assume he knows what he is talking about. coil covers from different companies are different materials/thickness, etc. so you just need to look at yours on your detector and see how it affects the performance.