Darrell - Nope, they're different. 4 Line = Bottom edge of band + 11.1 MHz SPR-4 = Bottom edge of band + 10.09 MHz 73, Garey - K4OAH Atlanta W4CX wrote: >I want to add ham bands to my SPR-4 coverage. Anyone know if they're >the same as the R4-x crystals? Any sources? > > 73, Darrell W4CX > >