|
|
|
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 |
|
March 2007
WORLD-WIDE CALENDAR
Search the Site
E-mail
Classics To Go
Archives
March 2007
February 2007 January 2007 December 2006 November 2006 October 2006 September 2006 August 2006 July 2006 June 2006 May 2006 April 2006 March 2006 February 2006 January 2006 December 2005 November 2005 October 2005 September 2005 August 2005 July 2005 June 2005 May 2005 April 2005 March 2005 February 2005 January 2005 December 2004 November 2004 October 2004 September 2004 August 2004 July 2004 June 2004 May 2004 April 2004 March 2004 February 2004 January 2004 December 2003 November 2003 October 2003 September 2003 August 2003 July 2003 June 2003 May 2003 May 2002 See more archives here Old (Blogspot) archives
Recent Entries
• War For Profit
• How trying to prevent genocide becomes genocide • I Have Not Yet Begun To Fight • Wind Boom • Isaiah Washington, victim • Hippie Shirts • A cunning exercise in liberation linguistics? • Sometimes unprincipled demagogues are better than principled activists • PETA agrees -- with me! • The high pitched squeal of small carbon footprints
Links
Site Credits
|
|
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.