Hi Andy, >The receiver has an MDS of -10dBµV to -13dBµV which is 0.1µV to 0.05µV, even with the >preselector! Provided the preselector is passive, these are good mds numbers but your calcuation is a bit too optimistic though: -10dBµV is equivalent to 0,32µV -13dBµV equals 0,22µV 73 Clemens DL4RAJ