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March 01, 2005
Old and current issues
This afternoon I attended a sort of impromptu reunion with high school buddies, which took place in a professional sound studio in Conshohocken, PA. The owner collects and restores vintage organs, like this Wurlitzer that they've named "Tut":  Speaking of vintage, the next photo shows a closeup "head shot" of a 2" reel to reel tape recorder that they use to engineer recordings for which I am told only tape recorder technology is suited. (A certain type of sound quality is uniquely peculiar to tape, and, as money is no object in getting things right, they use vintage professional sound studio equipment to do it.) 
Here's the high school group, wasting valuable studio time:  If the doors in any of these studio rooms are shut, you can't hear anything outside of the room -- and no one in another room can hear you. Each wall consists of two 2 x 6 stud walls, each with three layers of sheetrock on each side, with air pockets in between. Then there's special material on top of that. There are baffles and movable partitions for acoustical adjustments, sound-insulated channels to run cords and cables almost everywhere, and special wiring panels which would baffle most electricians. For starters, the studio runs on balanced AC power -- a poorly understood new wiring technology not covered by the Electrical Code -- but which involves eliminating the noisy voltage flowing through ground wires by a relatively common sense method: Balanced AC is simply 120 Volts that has been split evenly across two AC mains. One phase is +60V while the other is -60V. The mains are always 180 degrees out of phase across the load and therefore sum to 120 Volts, the same voltage and frequency for which equipment power supplies were designed. In this case however, the reference potential (ground) has been located at the midpoint between the two mains so there is no "neutral" wire.I was impressed by the idea, and I am told computers are much happier with balanced power. Geez, all this talk of balanced power is starting to sound political. (I better stop before I'm accused again of taking money from Republicans!) posted by Eric on 03.01.05 at 05:09 PM |
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Taking money from Republicans? Don't the Democrats do that every time they raise taxes?
Anyway, this here is now the best thing I ever did, within the blogosphere anyway. A stylized spectrum of all the spectrums I reviewed in my special spectrumological series.