[Elecraft] general coverage receive on KX3

[webrehm]

the kx3 manual describes these front end filters as follows

The relay-switched low pass filters are used during both transmit and
receive. A few of the filters are dedicated to one band but most cover two
bands. The signal on the antenna side of the filters pass through a
forward/reflected power and SWR bridge to the HF-6 meter antenna jack (BNC),
or to the optional KXAT3 automatic antenna tuner. Latching relays are used
to minimize power consumption.

The RF band-pass filters are used for both transmit and receive. Filters are
selected with low-loss CMOS RF switches. The band pass filters significantly
attenuate receive signals at harmonics of the RX frequency, particularly the
odd harmonics.

These filters can seriously degrade SWL sensitivity at non-ham band regions. 
Wayne or another designer will be able to answer this question if they are
watching this.

Dennis

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