Arduino 50% PWM of variable frequency insanity

const byte TX_ANT = 9;

void setup() {
    DDRB = _BV(DDB1);                  //Enable output.
    TCCR1A = _BV(COM1A0);              //Enable compare match clock
    OCR1A = 79;                        //Divides Arduino 8MHz reference clock (Derived every other clock cycle).
    TCCR1B = _BV(WGM12) | _BV(CS10);   //Enable CTC Prescaler Division
    pinMode(TX_ANT, OUTPUT);
}

void loop() {
}