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Old 13th October 2004, 02:45 PM   #1
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Default lead vs sand

Hi all,

Could any one give me the cons and pros of sand vs lead.

I've attached my planed platter and splint design with cavities for send/lead.
Any remarks on the geometry of the cavities?

Thanks
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File Type: zip tt1.zip (11.7 KB, 113 views)
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Old 13th October 2004, 05:24 PM   #2
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If I'm not the exception you may get more people to look at your picture if you post it as a .jpg. For me to open a zip file is so much effort changing screens and having to get out my secret .zip decoder ring, I just cannot bother, even if it is something I'd really like to see. The other problem I fear is to go through the un-zip process it leaves a trail of memory consuming garbage in my computer after I finish viewing. Some folks like zip. I never got used to liking it.
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Old 13th October 2004, 05:26 PM   #3
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As a general reply to your question. Lead is just dead weight so will make something it is attached to have a lower resonant frequency. Sand on the other hand while doing the same through the mass factor can also absorb vibration and convert some of it harmlessly to heat.
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Old 13th October 2004, 07:08 PM   #4
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Zipped bmp is indeed pathetic.

I have a personal dislike towards sand - it seems to rob music of life and dynamics when used in platforms and will probably do the same in a turntable.

Quote:
convert some of it harmlessly to heat

Nothing harmless about that. It's clearly frequency specific and as other types of excessive damping doesn't sound good IMO.

Based on successful commercial designs lead or oil/lead seems to be a successful combo and will provide reasonable damping and great inertia. Plus, it's bad for the environment which is another hint it may sound good
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Old 14th October 2004, 08:02 PM   #5
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Thank you for your replies,

I've drawn my TT using Autocad 14.
I can not export to Jpg.
Any other sugested formats?

Thanks
Izhak
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Old 15th October 2004, 02:37 AM   #6
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.gif

You could print it locally from Autocad. Scan print with flatbed scanner making a .jpg.
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Old 15th October 2004, 07:45 AM   #7
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Quote:
Originally posted by analog_sa
I have a personal dislike towards sand - it seems to rob music of life and dynamics when used in platforms and will probably do the same in a turntable.

Nothing harmless about that. It's clearly frequency specific and as other types of excessive damping doesn't sound good IMO.
I disagree strongly. My TT's are on a large sandbox, with lead/oil/sand plinths on two of them.

Quote:
Based on successful commercial designs lead or oil/lead seems to be a successful combo and will provide reasonable damping and great inertia. Plus, it's bad for the environment which is another hint it may sound good
It is good, but I can't see how it's bad for the environment when it's enclosed in a case.
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Old 15th October 2004, 08:14 AM   #8
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Quote:
I can't see how it's bad for the environment when it's enclosed in a case.
Absolutely. That's what i tell my wife whenever she finds my mercury stash.
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Old 15th October 2004, 10:00 AM   #9
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Quote:
Originally posted by IZHAKKATZ
Thank you for your replies,

I've drawn my TT using Autocad 14.
I can not export to Jpg.
Any other sugested formats?

Thanks
Izhak
Go to http://www.xnview.com and download XnView - a great little freeware image viewer, tweaker and converter. If you don't need the viwing or tweaking, just get Nconvert.

1-bit binary PNG or GIF will be the absolute smallest size for a linedrawing.
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Old 25th October 2004, 03:34 PM   #10
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Thanks Geek,

That was very helpfull.

I've attached the file in jpg.

If I'll use lead it seems like I need to decrease the lead vol. or it would be too heavy. (for both platter and splint)

Izhak
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