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
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