Good Evening,
Conditions were better than they have been in a long while. Both
bands had fast, fluttering QSB but there was less noise. Forty meter
signals had me turning down the gain. The steady hiss was absent,
making copy easier. Splitting wood made sending harder; I need to
swing left handed.
On 14050.5 kHz at 2200z:
W0CZ - Ken - ND
NO8V - John - MI
K6XK - Roy - IA
K0DTJ - Brian - CA
K4JPN - Steve - GA
On 7047.5 kHz at 0000z:
KG7V - Marv - WA
WM5F - Dwight - ID
K6XK - Roy - IA
K0DTJ - Brian - CA
N7TB - Terry - OR
K7TXA - Jim - ID
K6PJV - Dale - CA
W0CZ - Ken - ND
Until next week 73,
Kevin. KD5ONS
-
double f = 100; // frequency in MHz
double h = 1; // height of antenna in lambda
double I0 = 2; // maximum current in amperes
double r = 100; // distance from antenna to observer in meters
double size = 50; // used for scaling
lambda = 300 / f; // wavelength in meters
l = lambda / 2; // length of antenna
k = PI*2 / lambda; // to save some space
phi = 0; // for first iteration
To model the horizontal dipole radiation pattern at height h:
Create an arc by stepping theta from 0 to PI
using radius = size * ( ETA * k * I0 * l * sin(k*r)
* sqrt( 1-sin(theta-PI/2) * sin(theta-PI/2) *
sin(phi) * sin(phi) )
* sin(k * h * cos(theta-PI/2))) / (PI*2*r);
then sweep the arc by stepping phi from 0 to PI*2
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