I use the blue bowl at home. It takes up room too. I am using a 2 1/2 Gal bucket inside a tub that is 21" long 13" wide and 12" tall. When not in use, everything fits inside the tub except the battery. I use that for my electric dredge I made, so it gets used a lot.

I also use my bowl at home, in my opinion, not for field use
I will classify three times, run a summers worth of cons through the bowl
At this point I'm done, return the rest from which it came

Bill

For those who do not know what a blue bowl is, or how it works, here is a video that explains it. https://www.youtube.com/watch?v=34ZXddnyRwo

A Blue Bowl is often regarded as one of the more efficient devices to clean/separate very fine gold, but a slow process that requires screening down to about 50- or smaller, the material should be as clay free as possible, and to remove as much black sands as possible before using. They are VERY finnicky to set up and run and as such, I don't think they are well suited for field use, also considering the prep work of the material that is necessary. Base camp/finishing area yes, but on-site in the field... I think you'd be better off bringing cons back home or to your base camp for fine processing.

Remember: the Old Timers did all the finish work at the mill, often in dedicated rooms away from all the other machines/etc., and definitely not in the digging areas.

I feel if you remove the valve going into the blue bowl and just have the hose going directly into it with a dc variable speed controller hooked to the water pump like a power supply for a tattoo machine the bowl would work perfectly. The valve if you try to slow down the water actually speeds it up like if you hold your thumb over a garden hose end. It sprays instead of slowing. That's my opinion.

My 2 cents,
The Blue Bowl instructions say to classify to 30 mesh minimum. I use the 750 GPH pump bought with it. I got rid of the plastic valve that came with it and use a garden hose spigot that is much easier to control. It is an inline hookup with those connections.

That said, I don't have tons of cons to run, since using a Gold Hog Stream Sluice.

The Blue Bowl must be watched, because as the material in the bowl is reduced, the water speeds up and water level raises automatically.

My brother inlaw sent me a y-tube video of goldclaw. He brought his up from Vegas and we prospected two different Claims in the El Dorado Mountains in CA. They have different colors he had Blue .It was easy to use and efficient. I ordered one.

Just wanted to share a video that I found online that relates to the blue bowl. I thought it was a very well made video about processing concentrates. The video can be found at the prospecting channel.com website and it is titled "How to process gold concentrate: a complete guide" and it features Rob Goreham. Here is the link to the video. Hopefully it will help someone who is looking for information about the blue bowl or processing concentrates.


http://prospectingchannel...old-concentrate.html