[Elecraft] Sherwood Receiver Tests

[Chuck MacCluer]

The K3 and K3S are dead ends --- they are frozen at their present
capabilities. The K4 is a partially filled canvas that can improve over
time. For example, the K4s I hear on the air still have, like the K3xs,
that ugly popup in the unwanted sideband. They compare in this respect
unfavorably with the lowly IC-7300. But the K4 will someday possess
predistortion and consequently a pristine transmitted SSB signal. Unlike
its predecessors, the K4 has an unlimited future. That's the nature of a
full SDR.

Chuck w8mqw