Length of Damper?

[WildernessAU]

I have a basically stock keene sluice 12" x 4' for a highbanker dredge combo. I'm gonna add a damper since the water going throught the grizzly gets really bubbly and I dredge a fair bit with this set up.
How far down the box should I run the damper? 1/3rd half or the whole box? I'm mainly working in flour gold country.
What works best for you guys?
Thanks
Dainis

[russau]

on my 4 inch o/u dredge i run it past the first riffels to push the fines into the under section and to flaten out the water. 1/3 seems ok, but dont use material that is to thick and heavy, or itll hold the bigger gravels back.

[WildernessAU]

Thanks Russau, I"m thinking of trying some extra v mat I have smooth side down and see how that works, just have to figure out how to attach it.
I've seen people run the damper the whole length but I would think that would restrict the action of the riffles?

[tcfifer]

Might I suggest you buy a piece of whatever you're considering first and let it set in cold water for a few hours? If it gets real stiff/rigid, it won't do you much good in your box. Whatever you decide to use needs to stay flexible in all temps.

TC

[RD Round]

The best I have found is to order a damper for the four in. dredge from Keene and then cut it to the size you need.
I think the best length is between the first two riffles.

[russau]

Might I suggest you buy a piece of whatever you're considering first and let it set in cold water for a few hours? If it gets real stiff/rigid, it won't do you much good in your box. Whatever you decide to use needs to stay flexible in all temps.

TC

good tip Tim!! also rubber/plastics have a natural curl to them when they get cold so you want to see which way itll go. point being, watch what happens to the cheaper clear suction hose when its in cold water!

[Hoser John]

EZ to do,just go to OSH hardware,Capitol Rubber and many others to get your rubber for correct thickness,construction,nylon reinforcement ,durameter and memeory bend.The price is 1/10 keene and the boyz,as always on parts & pieces. 0.060 and up,past the first riffle by at least 8" or so(can always cut shorter but not stretch longer)flexible and utilize the natural curve from being on a roll(memory)to curve up as that never changes . A curtain can always help but if too heavy as many problems that it cures it will cause that many more. This is the very same rubber to make pump gaskets out of too,hense the nylon reinforcement works in wonderous ways to keep that pump gasket in place. Costs about a $1.00 to make and a half hour to trace and cut with a xacto knife vs $12 up.-tons a au 2 u 2 -John