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Old 28th October 2009, 01:19 PM   #1
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Default turntable isolation shelf

I was thinking about making a turntable isolation shelf. I was wondering if anyone has made one and how successful it was.

Thanks
Steve
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Old 28th October 2009, 02:31 PM   #2
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My system sits on a homemade rack, similar in design to Hi-Fi racks Trio, or the Atacama equinox, made from solid oak.

The shelves however are 'Tesco finest granite worktop savers' similar items available in Wilkinsons (uk for about 9gbp each, 400mm x 300m x 15mm). These shelves are isolated from the rack by sitting on squash balls, a few pounds from any sports shop.

For just over 10 pounds you have a isolation shelf that rivals the ones on ebay costing in excess of 10 times as much.

A dedicated wall mounted shelf would help substantially. Squash balls and granite shelf
to further decouple and isolate any unwanted vibrations.
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Old 28th October 2009, 09:52 PM   #3
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I built a wall mounted sand box with @ 75 Lbs of sand and a granite tile. Worked great. I had zero issues with vibration after I built it. You could wrap on the oak box with your knuckles and barely hear it even with the volume up pretty high.
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Old 29th October 2009, 09:58 AM   #4
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Go for a granite shelf as done in DPS. It is designed by Frank Schroeder.
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Old 29th October 2009, 11:37 AM   #5
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When my DIY Turntable is finally complete a sandbox/granite/oak platform will be made. Similar in design to TNT sandblaster.

The TNT SandBlaster 1.0
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Old 29th October 2009, 01:00 PM   #6
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Thanks that's what's great about this forum. All of your ideas got me looking around a little and I found this article. you might find it interesting also

Galibier Design - Frequently Asked Questions
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Old 30th October 2009, 11:17 AM   #7
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Sorry here is the URL

Galibier Design - Frequently Asked Questions
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Old 1st November 2009, 12:01 PM   #8
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Something I don't quite under stand about the sandbox platforms. Does the top sit directly on the sand with out any other support? If it does how do you get it perfectly level?
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Old 3rd November 2009, 05:34 PM   #9
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Typically there is a shelf that "floats" on the sand. The sand is covered with a plastic film to keep it from getting all over. There is a bit of fiddling to get the shelf/platform to be level. Level also needs to be checked periodically since the sand may shift/compress further.
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Old 5th November 2009, 02:34 AM   #10
berndt is offline berndt  United States
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I built the shroeder/makris design on the galibier page.
Click the image to open in full size.
I built the sandbox out of 1/4" aluminum as that is what I had about.
I still can get a feedback low frequency woofer excursion @ higher volumes but if I keep it under 105db I'm fine.
With the needle in the groove, measuring the voltage output at the phono stage while doing the rap test on the stand I get less than 20mv output.
Regards,Bill
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