Welcome guest, is this your first visit?
Member
Discoveries
 
Results 1 to 13 of 13
Like Tree11Likes
  • 2 Post By wildminer
  • 3 Post By CGC Miner
  • 3 Post By N-Lionberger
  • 2 Post By cobill
  • 1 Post By N-Lionberger

Thread: Dahlke 2.5" vs Keene 2.5"

« Prev Thread | Next Thread »
  1. #1

    Jan 2019
    Prattville, Alabama
    5
    Prospecting

    Dahlke 2.5" vs Keene 2.5"

    I am looking at purchasing a 2.5" dredge and have been going back and fourth between Dahlke and Keene. I am leaning towards Dahlke because of the compact size, light weight, and price, but I am worried about it's stability in faster moving water due to its shape and lack of pontoons. Any experience or input would be greatly appreciated.

  2. #2
    MAGA

    Dec 2015
    Oregon Coast
    493
    739 times
    Prospecting
    I would also look at Proline.
    russau and davin like this.

  3. #3
    us
    Nov 2010
    High Rockies
    GB2
    86
    69 times
    All Types Of Treasure Hunting
    Those are both very small dredges that will not be able to handle big or fast water.
    Both will work equally well in small calm streams or slow bigger rivers hugging the bank.

    I've been impressed with the dahlke 4" though don't own one. Very compact, few pieces to carry and the goofy looking box n riffles seems to outperform many other dredges of the same size on similar ground.

    Do you highbank? Maybe a 3" highbanker combo would be a good choice. a 3" dredge will process roughly double that of a 2.5".

    I personally run a 3" combo, 4" proline and 6"keene dredge
    N-Lionberger, russau and wildminer like this.

  4. #4
    us
    Mine President, XPBC, GIH

    Dec 2013
    Arcata, California
    Fisher 1212-x Fisher Gold Bug 2 Whites 4900/SP3 Rocker boxes, Keene sluices, Bazooka sluice, 2.5", 4" lowbankers, highbankers. Witch Sticks.
    601
    665 times
    Prospecting
    I have never played with a Dahlke though I have eyeballed the hell out of them I'm not a fan of the one piece construction, the pumps are pretty cool looking and I like the dovetail riffles, a concept I would like to play with in my 4". My experience of Prolines aren't super great, they are hard to take down and pack into the backwoods, they are pricey and I don't have faith in their sluices we tried placing a letrap sluice behind one and it caught pickers! My 2.5" keene which is old as the hills floated on an innertube, I have also played with my buddies newer 2.5" keene with pontoons out on the N Yuba river it handled choppy water fairly well, somtimes in moving from spot to spot through rapids the pontoons would nose dive and it would try to submarine the dredge. 2.5" dredges work best as highbanker combos, bucket feed the hopper until you reach bedrock then hook up a nozzle and clean it all up, its downright easy to out shovel the 2.5". Unless you are really paying attention to the nozzle its super easy to plug up the hose. When I made the upgrade to my also old as the hills 4" keene I was mad at myself for wasting so much time with the 2.5" it gets through the overburden a lot faster as you dont have to pick up and throw nearly as many small cobbles. This year I'm going to run my new to me 6" subsurface dredge under my 4" to blast through the overburden, then switch to the 4" surface dredge when I get into that good sticky rusty red stuff.
    Last edited by N-Lionberger; Jan 28, 2019 at 11:02 PM.
    wildminer, Goldwasher and jsurddy like this.

  5. #5

    Dec 2015
    72
    26 times
    All Types Of Treasure Hunting
    the 3 does almost twice as much as the 2.5 unquote ? I have just tried 1.5 and 2 inch suction dredge nozzels. if 3 does almost twice 2.5 then the 1.5 was nothintg but a toy? what kind of pump power does the three inch need? and what is the width of the sluice? thankyou for and sorry for such basic questions

  6. #6
    Charter Member

    Jul 2007
    Laporte, CO
    Minelab GPZ, EQ-800, GBII, AT MAX, AT PRO, DFX & V3i, Keene 2 1/2 and Proline 4" dredge.
    35
    22 times
    I have a 4" Dahlke poly dredge and the small DP 150 (150 GPM) pump with 1 1/2" hose does not produce enough suction, compared to the Keene 300 GPM & Proline 400 GPM with 2" pressure hoses. It does not do well in any current and you can easily overload the dredge flotation with hoses and equipment, while moving it to your area...mine started sinking! I also have a Keene 2 1/2" with a 4 HP Honda and that dredge does extremely well, can handle the equipment load and has plenty of flotation. Do lots of research.
    russau and N-Lionberger like this.

  7. #7

    Feb 2016
    63
    34 times
    All Types Of Treasure Hunting

    Dahlke 2.5" vs Keene 2.5"

    Quote Originally Posted by seafox View Post
    what kind of pump power does the three inch need? and what is the width of the sluice? thankyou for and sorry for such basic questions
    3 dredges tend to use a 3-4 horse engine and a 14 wide sluice is pretty standard. I made a 16 wide sluice for my home made 3 dredge. It works, but is a little large. I was using a 10 wide sluice before and it caught a lot of gold, but im pretty confident that i lost a lot of smaller stuff. Pump selection is probably going to vary between a 1.25 and 1.5 output.
    Last edited by jsurddy; Mar 01, 2019 at 01:10 AM.

  8. #8

    Feb 2016
    63
    34 times
    All Types Of Treasure Hunting
    Quote Originally Posted by jsurddy View Post
    3 dredges tend to use a 3-4 horse engine and a 14 wide sluice is pretty standard. I made a 16 wide sluice for my home made 3 dredge. It works, but is a little large. I was using a 10 wide sluice before and it caught a lot of gold, but im pretty confident that i lost a lot of smaller stuff. Pump selection is probably going to vary between a 1.25 and 1.5 output.
    I should add to my last comment that those pump sizes are for high pressure pumps made for dredges.

  9. #9
    us
    Apr 2014
    in my mind/wilds of,tn
    52
    57 times
    All Types Of Treasure Hunting
    i bought a dalhke 2.5 as my first and only dredge. not long after i got it, Tennessee changed the rules and made dredging a lot more difficult.

    i really enjoyed it though. i hiked that thing in and out of some very remote areas in the national forest (not always with ease when there are no trails, and a near vertical climb out).

    some of the other guys that i occasionally prospected with commented on how impressive the suction on it was for a dredge of its size.

    personally it was very easy to set it up and break down, and i thought the design was great. caught a lot of gold including those little flour pieces. before i bought it spent days of research reading reviews and threads about all kinds of dredges.

    i'm glad it was the one i ended up with.

  10. #10
    us
    Mine President, XPBC, GIH

    Dec 2013
    Arcata, California
    Fisher 1212-x Fisher Gold Bug 2 Whites 4900/SP3 Rocker boxes, Keene sluices, Bazooka sluice, 2.5", 4" lowbankers, highbankers. Witch Sticks.
    601
    665 times
    Prospecting
    California changed the rules too but it didn't stop miners in those remote hard to access canyons.

  11. #11

    Oct 2013
    404
    82 times
    I would build a sub dredge with that pump and move a 4" suitcase dredge like Trevs. .

    Those are my new plans for lightest up to size dredge capable of being a perfect sampling machine.

    Good luck. !

  12. #12

    Oct 2013
    404
    82 times
    Quote Originally Posted by cobill View Post
    I have a 4" Dahlke poly dredge and the small DP 150 (150 GPM) pump with 1 1/2" hose does not produce enough suction, compared to the Keene 300 GPM & Proline 400 GPM with 2" pressure hoses. It does not do well in any current and you can easily overload the dredge flotation with hoses and equipment, while moving it to your area...mine started sinking! I also have a Keene 2 1/2" with a 4 HP Honda and that dredge does extremely well, can handle the equipment load and has plenty of flotation. Do lots of research.
    I would build a sub dredge with that pump and move a 4" suitcase dredge like Trevs. .

    Those are my new plans for lightest up to size dredge capable of being a perfect sampling machine.

    I have made the 6" version with a p180 pump and i run @ 1/2 to 3/4 throttle.

    I could never see myself going back to surface dredge just because fuel consumption and all the extra ++ weight.

    Good luck. !
    Last edited by principedeleon; Mar 10, 2019 at 09:19 AM.

  13. #13
    us
    Mine President, XPBC, GIH

    Dec 2013
    Arcata, California
    Fisher 1212-x Fisher Gold Bug 2 Whites 4900/SP3 Rocker boxes, Keene sluices, Bazooka sluice, 2.5", 4" lowbankers, highbankers. Witch Sticks.
    601
    665 times
    Prospecting
    I'm planning on running a 6" sub dredge in conjunction with my 4" surface dredge this year, see how that goes.
    jsurddy likes this.

 

 

Remove Ads

Sponsored Links

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  

Similar Threads

  1. Dahlke 6" and Proline 6" ?
    By Aleksi in forum Dredging & Hi Banking
    Replies: 5
    Last Post: Feb 14, 2018, 12:53 PM
  2. Question about a Tiny 1" or 1.5" Keene dredge on a 2 stroke engine
    By NeoTokyo in forum Dredging & Hi Banking
    Replies: 17
    Last Post: Jan 30, 2015, 02:35 PM
  3. I just Bought a Dahlke 456-7 it Needs a 7" Hose !!HELP!!
    By Gringo72 in forum Dredging & Hi Banking
    Replies: 12
    Last Post: Feb 09, 2012, 10:21 AM
  4. Slim pickins today...silver "Roosie", "Buff", "wheaties" and "Yikes"!
    By lorraine in forum Beach and Shallow Water
    Replies: 6
    Last Post: Mar 15, 2011, 03:50 PM
  5. Replies: 0
    Last Post: Feb 29, 2008, 06:43 PM
Powered by vBadvanced CMPS v4.3.0