Is there a problem with single conversion receivers?
There is one situation where any single conversion receiver is open to interference that a dual conversion is not and that is at image frequency. JR and FMA have both had highly successful single conversion receivers for many years. Most car receivers have been single conversion over the years because the 75 MHz band is only 500 KHz wide; not enough to have the image frequency inside the band of interest. Since the 72 MHz band is 1 MHz wide, an improperly placed LO can permit image interference within the band. ( i.e.
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