I converted my Keene A-52 sluice to a highbanker by using a high density plastic
Rubbermaid container from Home Hardware. The translucent almost clear plastic
container is approximately 16" X 10" X 10" or very close to 10". I used 1/4" galvanized
ready rod for supports across the inside of the box to attach a grizzly screen which was
a chrome or nickel counter top plated rack for placing hot pots on. Rack was about 10" wide,
I clipped the feet off it and recall it was a tight fit. I may have made a slight modification
to the rack by clipping out a section. Used cable ties to tie it to the cross ready rod
supports. Also put some 1/4" hardware wire screen on top of the rack using cable ties
to secure the screen.
Material goes through the screen directly onto the slick plate. One ready rod support
doubles as a hinge to raise the box upward toward the front of the sluice. I bent some
1/4" aluminum bar, attached it to the front bottom of the box, drilled holes in the bar
and sluice to take 1/4" bolts and wing nuts to secure the box to the sluice.
I used 1 1/4" PVC water pipe, the white pipe, for spray bars and a 2000 gph water
pump. Worked fine except the 1/4" screen tends to pick up organic type matter like
moss, etc. The Rubbermaid "hopper" and system is okay but more for hobby or testing
or if one does not want to put a lot of money into a beginner's system.
I made other mods to the sluice like V mat, a type of miner's moss and expanded
metal riffles. I did not use the Keene riffle system. I had to make a type of hold down
system to hold the expanded metal riffles flat against the moss. My sluice came with
typical 1/2" square aluminum tube legs complete with the bolts and wing nuts.
I cannot post a picture of my highbanker due to an accident. The Keene sluice was
okay but part of the Rubbermaid box got smashed.
When I repair
the highbanker, I will buy a proper 10" hopper!!
For production the rod type of grizzly those guys up in the Cariboo make would be
much better. You may be able to get a skookum proper "hopper" from those guys
made exactly to your needs if you are going into serious hand mining. Believe I
have seen hoppers available from other suppliers too if you look around.
Wow, lots of action posts on your need for a hopper while I was typing this!
So there you go with lots of good ideas. Punch plate on the ready rod supports
is a great idea!
Best of luck with your project.