tonyf@mmintl.UUCP (Tony Faulise) (07/19/85)
Recently someone mentioned radio-stations mounting turntables in sand-filled boxes. It's not to damp out turntable-generated rumble but to prevent environment-caused rumble. I worked as a techie in a college radio station and here's the scoop :-) If you're listening to your radio at home, you do not want to hear the lump-lump of footsteps because someone just walked through the sound booth. So, we build a box of 3/4" particle board, hot-glue it together, and fill it with 800lb. of sand ($64). then we mount the tt on top. Preferably you cut a hole in your floor surface and let the box sit on whatever peice of your building supports your floor. I have seen heavy (260lb) people jump on the floor during a broadcast to demonstrate this insulating technique, it works. also: Studio turntables come up to speed in about 5 degrees of rotation. +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ Tony ("the meek and jumbled") Faulise allegra!princeton!yoyo!faulise ihnp4!philabs!pwa-b!mmintl!tonyf (till aug. 25)