On 12/24/2010 3:34 AM, Monty Shultes wrote:

> 3580 is a magic frequency, actually 3979.xx is the vertical
> (horizontal?) oscillator frequency in OLD tube TV sets.  I've
> been listening to that buzz for decades.

  3579.545...kHz is the color subcarrier frequency in the NTSC
  (analog) color television system which was used in the US and
  many other countries for both tube-type and solid-state
  receivers.  It is not used in current digital TV systems.

  See http://en.wikipedia.org/wiki/NTSC for more than you ever
  wanted to know about NTSC.

--  73 de K2ASP - Phil Kane
    Elecraft K2/100   s/n 5402

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