wrote in message
...
On Wed, 16 Jan 2008 21:41:45 -0800, "CalifBill"
wrote:


wrote in message
. ..
On Wed, 16 Jan 2008 13:23:20 -0800, "Calif Bill"

wrote:


Actually is 180 degrees for a peak to peak on a sign wave. But for
frequency, it is point to same point on the next wave. You could
measure
it
anywhere on the wave. But Positive peak to Positive peak or Negative
peak
to Negative Peak or + or - zero crossing all work.

Frequency = 1/ time.

Wave length = speed of wave / frequency. This will work for sound at
about
1126 ft/ second or 300 m/s for radio.


What's the matter Bill? Didn't the website you Googled know how to spell
sine?

Bwhahahahahahaha!



Me bad. Especially for misspelling sine. I know all that stuff. My
degree
is in Electronic engineering. As well as the fact I worked on repairing
Radar and Instrument landing systems and nav aids in the Air force. As
well as part of my patent includes Sine Square + Cosine Square = 1.

If I had googled it, I would have spelt Sine correctly.


Harry... Dat you?

Nope, I actually did work on the stuff. I have part of a patent on flaw
scanning disk drives where part of the circuitry depends on Sine Square +
Cosine Square = 1. Interesting part of a flaw in the media, is if it is
under the head, you will get reduced amplitude, but if off to the side, you
will get a phase shift. Was always hard to detect the flaws off to the
side. So if you compare the signal coming off the disk if it is written so
it will be a sine wave, and compare the signal + and - 45 degrees and run it
through a adder circuit and the output will be 1 until a phase shift and the
output signal will decrease and you can detect defects off the center line
of the tract.