The source code below was written in C++. All you have to do is copy and
paste it into a text editor and then compile it. The program asks to the 
voltage and current of the modulated amplifier and also the efficiency and 
the modulation percent. Enter the voltage as volts and the current as amps 
(i.e. entering .255 is equal to 255 milliamps). Enter the percentages as 
the percentage, but without the percentage sign (i.e. enter 100% as 100, 
75% as 75, etc.). The program then calculates the power input to the final 
amplifier, the power output of the final amplifier, the audio power needed 
to modulate the amplifier, the modulating impedance of the final, and the
peak envelope power of the modulated signal. Email any questions to 
kb3ouk@sdf.org.

			***BELOW IS THE PROGRAM SOURCE CODE***

#include <iostream>
#include <cmath>
using namespace std;

int main()

{
	double ip;
	double ep;
	double r;
	double paf;
	double eff;
	double pi;
	double m;
	double po;
	double pep;

	cout << "Enter the final amplifier supply voltage in volts: ";
	cin >> ep;
	cout << "Enter the final amplifier current in amps: ";
	cin >> ip;
	cout << "Enter the percentage of the efficiency of the final amplifier: ";
	cin >> eff;
	cout << "Enter the percentage of modulation: ";
	cin >> m;
	pi = ep * ip;
	po = (ep * ip) * (eff / 100);
	paf = pow((m / 100), 2) * (ep * ip) / 2;
	r = ep / ip;
	pep = 4 * pow((m / 100), 2) * ((ip * ep) * (eff / 100));
	cout << "The power input to the final amplifier in watts is: " << pi << endl;
	cout << "The power output of the final amplifer in watts is: " << po << endl;
	cout << "The power needed to modulate the amplifier in watts is: " << paf << endl;
	cout << "The modulating impedance of the amplifier in ohms is: " << r << endl;
	cout << "The peak envelope power in watts is: " << pep << endl;
	return 0;
}