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PG-Prospecting

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PG-Prospecting last won the day on August 26 2019

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About PG-Prospecting

  • Rank
    Copper Contributor

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  • Gender
    Male
  • Location:
    Virginia
  • Interests:
    Gold Prospecting, metal detecting, geology, maps
  • Gear Used:
    4 inch gold dredge, GPX 4800, GM1000, Equinox 800, LiDAR maps, various sluices highbankers and pans.

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  1. My biggest one is 11.9 gram drum stick nugget, found back in 2015 in Virginia with my 4 inch proline dredge. It is the biggest piece out of section of stream that produced over 16 oz. All with dredges. Still looking for my ounce nugget.
  2. SJM - I will eventually throw on 5.5hp with proline p350 pump to see how much suction the powerjet can generate, but for the purposes of this dredge im hoping to mainly use the 4hp motor. I removed the air compressor just due to the fact of wanting this one to be as light as possible and will mainly be in creeks that i can snorkle in. If i hit deeper areas i just bring the proline 4 inch or my 5 inch. This one will also serve as a lightweight sampling rig. Joe D - Thanks for that info! Ill have to play around with those websites and see what i can learn! I also plan to increase the hp of the motor by adding a performance exhaust and carburetor, go-cart guys do this all the time with their honda motors and simply putting on a race exhaust and re-jetted carb with race air filter should increase the hp of the motor by 1 or 2 hp. Joe D with your background you should get up with someone who has a dredge and go over it with them and work on figuring out all the areas where the flow dynamics could be improved. While the components of dredges all work im not sure how much has been gone over by someone with a back ground like yours. I mean in comparison performance exhaust systems on air planes are polished and meticulously gone over just to pull a few more hp of out say a 200 hp piper supercub. Then i go an look at the inside of a keene pump and see how rough it is and cant help but think that if it were polished and gone over carefully that a few extra gpm couldnt be had. Especially since the friction of water is far greater than the friction of hot exhaust. Steve - Thanks! Im of the same mind that less friction of a larger intake would help a tiny bit. Im always of the philosophy that ounces make pounds and pounds = pain. Using the same thought process with gpm and efficiency of the power jet. All those little not noticeable gains/losses add up to a noticeable amount. Larger intake hose and foot-valve coupled with a larger and shorter high pressure line, coupled with shorter suction hose and better placement of the power jet. While each single thing wont make a noticeable increase in suction, all of them combined should. Well at least thats what im going with lol. Sorry rambled a bit in there, with my thoughts and observations, but im just a geologist that tinkers, definitely not an engineer lol
  3. Thanks guys! It adds another one to my arsenal which already consists of a 2.5 inch, a proline 4 inch and homemade/keene parts 5 inch. I like building things and still have enough parts to more or less build another 4 inch and another 5 inch. Steve - What are you thought on increasing the size of the intake line from 2 inches to 2.5 inches, as well as having a larger footvalve. The intake on the pump still constricts to 2 inches, but i wasnt sure if an increase in line and footvalve size would help or hinder the gpm. Thanks again! Next project is a 5 inch ultralight mini, using a derivation of Dave McCrakens double screen classification system.
  4. Been messing with this project on and off for a few years now. Finally got it where it was ready to be tested this past weekend. Was originally a keene 3 inch with 4 hp motor and p160 pump i believe. I sold off most of the 3 inch parts and started building the components need to turn it into a 4 inch. From the 3 inch all that remains is the frame, floats and motor and pump combo. I bought a 4 inch flare from keene, since i have no good way to fabricate a lightweight flare. Everything else i have been working on fabricating, primarily being the sluice (16x40), riffle trays, and the power jet. The power jet is were i diverged from most of the current designs that are widely used. I wanted to build a 4 inch as light as possible while still using the 4hp motor and pump combo, as most the streams i work are shallow and dont require huge amounts of suction for dredging at great depth. The problem was that the 4hp motor and p160 pump struggled in my mind to provide adequate suction to the 3 inch even when near full throttle. Based on this i decided to build a copy of a dahlke tri-jet which should allow a 4 inch to be run off of a smaller motor and pump when compared to a normal 4 inch, due to increased efficiency over a standard style of power-jet. Pictures of the tri-jet in various stages of completion: Picture of the sluice and riffle tray, first iteration with woven wire: Testing day! Couple of issues were noticed while testing. There were a few leaks in the power jet, the woven wire was too open and large rocks would get stuck on it, the high pressure hose was way too long and since it was inch and quarter and so is the pump output , it was constricted to less than inch and quarter at the coupling areas, and the long high pressure hose probably caused a loss in pressure due to friction. The power jet should also be mounted not right at the flare but a few feet from it, so that the hose acts as a longer jet tube and helps increase suction, a 20 ft suction hose also didnt help. But regardless i was able to dredge with moderate suction, with it. So the test was a success, and with the various refinements it should have greater suction and water flow. Then the next day, the various refinements and fixes from the problems noted during testing. Replaced the woven wire with 3/8 inch 40% open punch plate, moved the jet so it is mounted about 3 feet from the flare, shortened the high pressure line and increased it to 1.5 inch so there are no restrictions, patched the holes in the power jet, and painted it. I do have a question or everyone, would increasing the size of the footvalve and intake hose from 2 inch to 2.5 inch help increase the gpm of the pump at all? The footvalve cage that came with the keene pump seems small to me. I have some pictures below showing the difference. I look forward to hearing from everyone! It was a fun project!
  5. Garikfox - The min-trucks are actually pretty cheap you can find used ones with offroad tires already on them for around $4,000 to $6,000.
  6. Ive been looking at Japanese mini-trucks. They fit what i need better since they have a 6 foot bed, and are still about the same dimensions as most utvs. Just gotta buy one that is 4x4 with axle lock or dif lock and put offroad tires on it. They also have a full enclosed cab and can be found with AC and heat, and can be made road legal in certain states. I just havent been able to justify any type of UTV since they all have tiny tiny beds, and cant get them road legal.
  7. Hey Steve, any thoughts on starting another poll to see what people are now mainly running in 2019. Would be interesting to see some of the shifts, especially with all the new vlf gold machines on the market. Just a thought.
  8. So there is a used Whites TDI pulsescan detector in my area for sale for $675. It is not an SL so im guessing its an older version. Is there any benefits to owning this detector along with a GPX4800? The price seems good and its close by. Ive also thought i heard that the older TDI were more powerful. I also believe it can use most GPX coils correct? I dont really need it but it seems like a great price for a PI detector.
  9. Lacky - I did do that, but no pings. The bedrock is so decomposed in this spot that I can rip into it a few inches with just my fingers. So I generally remove the upper few inches of bedrock, but I still detect it after. afreakofnature - yep ive seen them and many others all around the hillsides. I haven't detected those ones yet but I plan to. Ive detected around other similar pits and came up with nothing. Including in areas that have produced lots of big nuggets with the dredge. Its a baffling area in that way.
  10. Haha, i doubt it would spit out a big nugget. Its already caught a gram nugget right up top where it should. And yes i try to document everything. It helps with the big picture of whats going on in the area. Below is some of my mapping, yellow squares are pickers, yellow circles are nuggets, and the triangles are colored based on the type of bedrock at each location. Is anyone else tis crazy when it comes to mapping and documenting the area that you primarily prospect?
  11. Was at the above spot for labor day weekend. Didnt really detect much as most of the pieces worth recovering with a detector have been found, so now is the time to dredge the area. So i pulled out my homemade 2.5 inch dredge so that i could have clear water while dredging. I probably would have got more gold if i used the 4 inch, but then the water would have recirced and its more fun to be able to pick gold off of the bedrock. The homemade 2.5 inch set up. 10 inch wide box and riffles are from a side sluice of an old keene 5 inch triple. The first days haul. Biggest nugget was about 10 grains. Camping right next to where you dredge, cant beat it. My fiance and our dogs. Second days haul, the two pieces of quartz were in-situ and each have a small speck of gold visible in the quartz. I pulled more out with the intent to eventually crush it. These two pieces im going to clean up and see if more becomes visible. Hammock are so much better then tents. lol
  12. Chase - I found these in the gold pyrite belt that runs from DC down between Cville and Richmond down into Buckingham county. Its funny that VA was once the third highest commercial gold production state yet it only produced about 160,000 ounces. But it definitely produced some nice nuggets including a 9 lb one and two big ones that are in the Smithsonian. If your looking for gold ground to detect look up the Central Virginia Gold Prospectors club (CVGP) they lease a number of gold bearing properties including the one that produced the 9 lb nugget back in the 1800's.
  13. Man this is going to put geologists out of job. It took r jobs, lol. Id love to take someone who thinks this works to a few of my spots and watch them flounder around as I dredge and detect up nuggets.
  14. Strick - We are pretty much exclusively on private property that we have gotten permission for. Lacky - Yes on the next one i will pay more attention to the volume. Funny thing is, is that i didnt notice it when i was making the video and i had head phones on. Not sure why i didnt hear it.
  15. I wish i did but the furthest i drive for gold in VA is about 1.5 hours. Not much cool scenery in between.
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