On Friday 14 July 2006 04:26 pm, Carl Lowenstein wrote: > On 7/14/06, Andrew Lentvorski <[EMAIL PROTECTED]> wrote: > > I remember the big, old B&W TV's at the houses of my elderly relatives. > > They were particularly bad for me because, as a child, I could > > apparently hear well into the 20-40KHz audio range. This means that I > > could *hear* some of the circuitry in an operating television (I presume > > the flyback transformer). Good if you are a 6 year old looking for > > video games at Kmart, Sears, etc.; bad if you are a 6 year old watching > > television on an ancient TV. > > 15750 Hz. Horizontal output frequency for B&W TV. Well, actually > 15750 cps since it predates the adoption of Hz as a frequency unit. > > Nowadays 15734.26573 Hz for NTSC color TV. > > carl
If you think about it NTSC color is a really unusual piece of work. A major electronics standard adapted in 1953 and still in use over 50 years later. And this is something a lot more sophisticated than just an electrical outlet ... IMHO NTSC was a remarkable piece of enginering. http://en.wikipedia.org/wiki/NTSC BobLQ -- [email protected] http://www.kernel-panic.org/cgi-bin/mailman/listinfo/kplug-list
