On Tue, 23 Dec 2008 16:53:34 -0800 (PST), Robatoy
wrote:

On Dec 23, 7:44*pm, B A R R Y wrote:
PDQ wrote:

As to fines, the cyclone culls out almost all the big lumps (think jointer or planer) but does not do as good a job with the fine stuff as a lot of that still gets to the filters.

That's why John said "properly designed".

My JDS has had over 200 gallons of junk sucked in over the last three
months, with less than 2 gallons in the filter bag.

I use a decent amount of MDF and plywood, and own a 22" drum sander, so
I get plenty of "fine" dust. *It's really obvious just by looking in the
drum how much fine dust the drum catches.

I know you know your dB's. JDS claims 78 dB. Is that even close?

I had a real interesting discussion here about "sound suppressors" a few years
ago, don't know if you remember it..
I was trying to figure out how the DC muffler from Penn State could lower the
DB's 7 to 10 db's for "up to a 50% reduction"..
Sounded like snake oil to me, so I asked here and got lots of answers that used
math to explain it and were beyond my understanding..
Then, someone (Dr. Deb?) said that they had one and it lowered it nicely..

I bought one and was really amazed at the difference... Cheap "2 hp" DC from
Harbor Freight, went from shouting to someone next to you to talking in an
almost normal tone..

Got explained to me later in terms that I could understand.. Something about
taking even a few DB off the top lowers the "annoying" level quite a bit..
Anyway, works for me and I'd never run a DC without one now.. YMWV


mac

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