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About osbod007

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  • Interests:
    Motorcycles, airguns, prospecting, metal detecting
  • Gear Used:
    Whites GM3, GM4B, Tesoro LST, Tejon, Vaquero, Sovereign XS2-pro, Compadre, Pistolprobe, Black Widows, Sunray Golds

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  1. IDdesertman, Sorry for the misleading intro. The gold classifier of the Yankee Fork Dredge may be for small gold. My interest is North in the Fairbanks Alaska Goldstream Creek near Fox where the old Gold Dredge No.5 operated and still sits. It is possible that the trommel classifier in No.5 dredge may have been sized for larger gold. I have not been able to find the spec.'s of the trommel to know for sure. I do know that larger gold did exist and exited with he tailings. The tailing piles are still all 'active' claims.
  2. Discrimination not so much, in these tailings piles depth and area coverage would be my preference. I have watched a number of vids posted from down under where they have a very large PI coil attached to a GPX5000 and this arrangement being pulled behind an ATV. Looks humorous but the results seem to speak for themselves. The nox in all metal with a really large coil would probably be the ticket except for the pendulum weight factor having to swing it over a very large area of landscape. (yes, I know, I'm a whimp).
  3. I've been looking at the spec.'s on this dredge and it shows the trommel classifier to have holes of a maximum of 5/8 inches. This dredge was built and put into service around 1939-1940. I would believe that the late date of manufacture and historic operating experiences would have dictated the design spec.'s to recover the vast majority of the gold available. That said the larger gold would have been ejected out of the fan tail in the pilings mix. I have detected tailing piles north of Fairbanks with my Tesoro LST and due to the low mineralization and favorable conditions I was hitting 22 lead at around 10 inches but no gold. A target greater than 3/4" is sizeable so I would presume maximum depth and large area coverage would be the best plan for recovery. That along with a coordinated dozer push to keep the overburden to depths of less than 2' I think would be ideal. My question might be which detector would be best? Low mineralization and targets greater than 3/4" and large area coverage.
  4. Jeff's suggestions are right on target. You might wish consider joining a local club although the governors SIP is hampering meetings right now. I believe the High Desert Prospectors are in your area. Hopefully you will meet members willing to share their insights and you can see what they're using. Hands on tutoring is a big help not only for the machine but for the land and terrain. North of you is Coolgardie, your best bet, still some areas open, unclaimed and nuggets to be found. Dry washing is the norm as most of the gold is small. HH and good luck on your venture.
  5. I do believe I checked the targets in both the primary and secondary disc. circuits and got the same results, I will do a retest. The pellets were equal in size and buried at 1", 2", 3", and 4". With my Lobo LST and the same coil I could hit all targets in All Metal, switch to Discriminate and in the lowest disc. setting I could get an easy repeatable signal from the 1, 2. and 3 " targets. I expected the same performance from the Tejon but in disc. setting I didn't get a response from any of the targets.
  6. I need a little help here in understanding the primary discrimination knob. Here is my observation. 8X9 coil, Using a lead pellet as a test target, buried 3", when placed in All Metal the target sounds off loud and clear. When switched to the discriminate mode, knob far left (zero discrim,) I don't receive any signal. I would think that at the lowest discriminate setting I should be getting a signal from iron on up. Is it possible the internal discriminate circuit out of adjustment?
  7. Hi Skate, Having been in construction all my life I too have had intermittent bouts with tendonitis. The Armaid looks like a great tool for therapy and thanks for sharing. For short term relief I have had to rely on the over the counter NSAID's available. Different NSAID's seem to work on pain in different ways. I was able to use and get by on `Ibuprofen for years, then when the relief from that waned I found Naproxen.
  8. Tag, there is a 'Tesoro 9X8 metal detector coil' on ebay presently. Description says it's new and it's a 4 pin. Auction ends Sat. 1 pm. I have one and it is a good match for both the Vaquero and the Lobo ST. The Compadre with the 5.75 C has excellent discrimination and goes fairly deep for it's small footprint, not quite so much with any of the other coils. Having the 5.75 C for the Vaquero would definitely be redundant, but if you ever find a 5.75 WS grab it. I find it the best coil on the Lobo ST for nugget hunting a patch and it should do nearly as well on the Vaquero. To cover large park type areas I use a 3X18 WS on the Vaquero to locate and mark targets then go back to the markers with the Compadre (5.75C) for discriminating and pinpointing. Coils have different personalities and react somewhat differently depending on the ground and the machine they are attached to. The fun is finding the combinations that fits your needs.
  9. Nice bird, 'Champion?' What's under the cowling? Gravel bars do create opportunities. Thanks for sharing.
  10. Drywashing according to Jim Straight requires less 5% moisture content for efficient recovery. Theoretically figuring then I would assume that desert dirt ground assayed at an ounce per ton, processing a cubic yard (3'X3'X3') should yield an ounce. I guess this would follow logic if the gold was evenly distributed? My thought is going back to the early years when an old drywasher miner up in the desert would stake a claim to run material. He had to conceive some method of calculating how much yardage he would have to process to justify his labor effort. Hopefully more than just putting beans on his plate.
  11. RD, I believe they are referring to adjusting the sensitivity. Set too high and the PP wants to sound off to the iron mineralization in the ground. Both my TreasureMate PP and PistolProbe ( both PI pinpointers) did this. Too much, for maximum depth and it becomes unstable sounding off indiscriminately. So you to back it down, lose a little sensitivity and depth but it becomes stable for finding your targets. My question, being it is a PI unit, how does it compare to the PistolProbe or the LandandSea PP's on the market. Don
  12. Capacitors going bad (leaking) will give off a scratchy like crackling noise. Most likely it will need a return trip to Sweet Home. GL Don
  13. Must be related to the soil conditions where one hunts. My local park reveals clad dimes and quarters a dark reddish color and copper pennies a dark brown. Nickels have a purple coating but in good condition. I recover about 1 pull tab to every 10 zinc pennies, the zincs are usually totally corroded. My take is about 50/50 clad to zinc.
  14. I may be missing something here but I'm inquiring to see if someone might clear up my question? I believe mining reports of gold recovered are quoted in ounces per ton processed. My question is 'what is the physical dimension of a ton'? I've done some research and came up with the general consensus that one cubic (3'X3'X3') yard of dry dirt is approximately 2000 lbs. However one cubic yard of dry sand is quoted as approximately 2800 lbs. and a cubic yard of mixed gravel is quoted as approximately 2600 lbs. Do these figures seem correct? I would think quoting ounces per cubic yard more meaningful. If drywashing I guess the weight for dry dirt would be close enough to figure the approximate recovery rate per yard?
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