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Old 11th November 2002, 10:32 PM   #21
halojoy is offline halojoy  Sweden
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Default I like the tennis-ball idea

And I have not yet tested any damping on my things.
Most equipment I have, has feets with rubber.

Also there is some cellplastic? used to put around
water-pipes. For to isolate, keep the heat. In the heating system (or warmwater?)in a house.
They have a slice opening, so you can put it around the pipes.
I have thought of using these, also cut into halves.
You can cut them into desirable lenght
and put them under your devices.

What would be the ideal pattern, I do not know.
Maybe they could damp the enclosure resonances
as well as decoupling from the base.
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Old 11th November 2002, 10:52 PM   #22
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Default Re: Levitator

Quote:
Originally posted by Danny
I don't know if I can post a reference to it or not. Some forums freak out and reprimanded me for posting links to other forums. You guys can let me know.
No problem. Links to any useful information out on the web is encouraged.

dave
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Old 11th November 2002, 10:55 PM   #23
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Default LEVITATED.

Hello,

One thing keeps bugging me though:

We now have a platform that achieves near perfect isolation from the environment.
But unless all other components are isolated in the same manner the mere presence of the linking interconnects is going to spoil this since they will carry the vibration to and fro the rest of the chain.

The only viable solution would then be to put everything linked on the same type of support and dress these links very carefully.
Interconnect,powercords, the lot.

Or,would it be sufficient to isolate the most sensitive ones?

I wonder.

Thanks for the enlightening contribution,Danny.

Rgds,
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Old 11th November 2002, 10:56 PM   #24
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Default Re: I like the tennis-ball idea

Quote:
Originally posted by halojoy
Also there is some cellplastic? used to put around
water-pipes. For to isolate, keep the heat. In the heating system (or warmwater?)in a house.
They have a slice opening, so you can put it around the pipes.
I have thought of using these, also cut into halves.
You can cut them into desirable lenght
and put them under your devices.
I had never thot of using those... they might not be able to support the weight thou (squash)

dave
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Old 11th November 2002, 11:16 PM   #25
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Default ISOLATED AN COLD.

Hi,

Quote:
Also there is some cellplastic? used to put around
What you mean is polyurethane foam or similar material.

This works great under lighter gear.
It actually works along the same lines as the damping materials used inside LS cabinets to mimmick a larger internal volume and impede airborne energy converting it in to heat along the way.

The trick is to not compress the cells so the virtually infinite and amorphous structure is maintained.
It may pay off to put a slab of lightweight wood on top as to not cause local indents in the foam.

One problem with this is that it eventually does cave in under the weight,but for the moderate cost involved you can easily replace it with a fresh cut-out and the one you replaced will tend to regain its' original shape much the same way a matrass does.


Cheers,
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Old 11th November 2002, 11:25 PM   #26
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Default Recycling....

I find automotive valve springs work well, and you can get them for free.

Eric.
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Old 11th November 2002, 11:44 PM   #27
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Default SCRAPYARD MAN

Hey Eric,

I think that's your plundering Viking blood talking.

Valve springs do have rather high f no?

What you could recycle though are those smaller gasfilled shocks as used to lift these boards in the back of a hatchback car.
(can't think of a name for those).
You know where the kids throw there stuff on so it's out of harms' way and such.

Mount these at the tops of a Y-shaped rigid structure to put the player on and you'll have yourself a nice "el-cheapo" iso-plat.

Cheers,
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Old 12th November 2002, 12:04 AM   #28
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Default Works For Me....

The gas struts have too much stiction in the seals I reckon.
With springs under my quite heavy vavle reciever, I am getting a 2 Hz or so rocking when I give it a shove.
Under my workshop speakers using heavier springs I am getting a 2 Hz or so rocking motion when I give them a shove.
I have not tried fitting damping to them - perhaps a chunk of foam pushed into the middle would work dandy, perhaps not.
I like the sound with spring mounting, and find my systems go louder and harder, and stay cleaner and more musical.

Eric, The Trendsetter.
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Old 12th November 2002, 01:01 AM   #29
halojoy is offline halojoy  Sweden
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fdegrove:
".. it eventually does cave in under the weight"


I see.
Seems like a big part of the trick,
is to find the right quality of the isolation material,
in relation to the weight it is going to carry.
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Old 12th November 2002, 03:04 AM   #30
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Default Nice thread guys.

Okay guys here is the link to the Levitator review from Wayne, owner of the Bolder Cable Company.

http://www.harmonicdiscord.com/forum...itator&start=0

Looks to me like the real contributor was Pjotr in this thread. There always seams to be someone with an EE degree in the bunch.
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