[Elecraft] RX antenna (K3)

[Craig D. Smith]

DX Eng makes good stuff, Adriano, and I would think this to be a good
vertical active whip.  You might want to also check out the active whip from
Clifton Labs.  It is also a high quality unit with good overload
characteristics and ability to automatically turn off during Xmit periods.
Available as a kit and much less expensive than the DX Eng, even with the
coax DC coupling unit.  I have one 50 ft away from my xmit antennas at 100 W
and have no problem. 
Another possibility you might want to explore is a K9AY loop array, even if
not full size.  This will give you the advantages of less RX noise than an
active whip and significant selectable directionality on the low bands.  I
use one of these also and prefer it to the whip on 160 thru 30.  They are
commercially available, but can also be easily homebrewed.  I use a
homebrewed downsized K9AY and the active whip together as a diversity RX
system with the K3.
73   Craig  AC0DS