receiver in single conversion receivers with only one intermediate frequency the choice of a frequency for the intermediate frequency involves a trade off since a lower if has advantages of better selectivity better stability and higher gain while a higher if has the advantage of better image rejection as is known in the art a double conversion tuner achieves the benefits of both a high and a low if by employing a high first if and then converting to a low second if thus an incoming rf signal in the am band 530 khz to 1710 khz is up converted in mixer 22 to a first intermediate frequency if 1 fixed crystal oscillator 28 is used to down convert the first intermediate frequency to an intermediate frequency if 2 which is lower than if 1 in the preferred embodiment of the invention this same fixed oscillator 28 is used to form rf reference signals for dynamic self alignment of the fm tuner the several reference frequencies to be used in a self alignment procedure are generated by an auxiliary mixer which mixes the fixed oscillator signal with a variable oscillator signal from the fm tuner in order to also allow the.