Thank you for all of the responses.
My newsreader has a quirk that only showed Leon's first reply - the newsrea=
der thinks everything else with that title is a duplicate - checked Google =
and there's a whole conversation going on.....=20
So I'm trying a first post using that method.=20
Anyway.
No intent to stir the pot. The Relative Humidity is so high where I live (=
south of some of the frequent posters here) that I really have to try for a=
while in the winter to generate enough static electricity to give the dog =
a buzz.
System is 6" metal to a wooden chip separator box, then 6" metal to a Y red=
ucer to 4 inch PVC that goes over head. The RAS, router, tablesaw, bandsaw=
, scrollsaw, drill press, and a couple utility outlets are all connected fr=
om chest or floor level 4" PVC drops via the common clear 2" or 4" wirewoun=
d flexible hose. PVC joints are caulk sealed. =20
I'm very happy with the way the system works. If I remember to open the ap=
propriate blast gate the shop stays fairly clean. The only PITA was instal=
ling two 45s to make a very broad turn to come down the wall. The hose wou=
ld have been nice here - friction loss or not.
Back to the topic - The question of whether the black hose/pipe had the sli=
ts in it was the first thing I double checked. The only penetrations are t=
he 4" ones at each end of the hose. Good idea.
The is 4" (I've got some about 2" too) ribbed hard plastic. The sound seem=
s to eminate only from the opening of the hose - there doesn't seem to be a=
ny sound along the length of the hose, regardless of how much I attach or h=
ow it's broken up, though some may be masked by the howl I'm describing. I=
t makes no difference if it's on the floor or suspended or if 'pressure poi=
nts' are applied along the hose that should stop any vibrations. =20
This is likely a case of using the right tool for the job, but I have this =
stuff, it would be convenient to use it, and I've seen what ->looks<- like =
it in various shop photos and videos.
If you made it all the way through this epistle, thanks. Ideas are welcome=
d. If you are using what even resembles this stuff, what is it?
-Joe
"Joe <Joe@Joe'sPlace.com <invalid>" <[email protected]> wrote \
> The is 4" (I've got some about 2" too) ribbed hard plastic. The sound
> seems to eminate only from the opening of the hose - there doesn't seem to
> be any sound along the length of the hose, regardless of how much I attach
> or how it's broken up, though some may be masked by the howl I'm
> describing. It makes no difference if it's on the floor or suspended or
> if 'pressure points' are applied along the hose that should stop any
> vibrations.
>
> This is likely a case of using the right tool for the job, but I have this
> stuff, it would be convenient to use it, and I've seen what ->looks<- like
> it in various shop photos and videos.
>
> If you made it all the way through this epistle, thanks. Ideas are
> welcomed. If you are using what even resembles this stuff, what is it?
If you take any ribbed tube and swing it around in a circle over your head
hard and fast enough, you will get a howl out of it. It is the ribs acting
like a whistle's splitter where you blow across the split. A hose like a
vacuum cleaner has ridges but they are in a spiral and they are not sharp,
so no noise...
Jim in NC