The ZS6BKW antenna is a better match for our bands than the G5RV. The method of construction and tuning  is essentially the same for both antennas but the dimensions are different.

Here is the ZS6BKW antenna installed at AK6R fine tuned for the CW/FT8 frequencies on 40-20-17-12-10 meters.  An excellent antenna when installed at 30 feet or higher and no tuner required avoiding the tuner losses and constant retuning.  If you want to work all bands from 80-10 install an antenna tuner between the 1:1 balun and the amplifier and ignore the 39/40 switch.

Is this the best FT8 antenna?  – I think so as I has made over 70,000 contacts and it still is a proven winner -Good world wide DX, easy to install, no tuner and takes full legal limit.

Here are several different 1:1 baluns you can use depending on power requirements:

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DELUXE Desktop Computer with AC power RFI Kit - 11 Filters

RFI-DESKTOP-DELUXE

$69.95

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Product Details

MPN: RFI-1D

Type: New

Country/Region of Manufacture: United States

Filter Power Rating (PEP watts): n/a

RFI Suppression Range (MHz): 1-300 MHz

# Ferrite Filters: 11

Enclosure Size (inches): n/a

Typical Use:: 1-2 turns on all I/O cables

DELUXE Desktop Computer RFI Kit - for 3 AC Powered devices and interconnect wires

Deluxe Desktop Computer RFI Kit for- 1 Ring Filter for computer AC power + 6 Snap On filters for interconnect cables plus 2 additional AC power Ring filter and 2 snap on filters for interconnect cables of peripherals such as printers, AC powered speakers, etc. The filters are selected to eliminate RFI from 1 to 300 MHz. The beads are easy to use, don’t require modification of the protected equipment and work in almost all cases, even when plug-in filters fail.

Deluxe filter set for eliminating noise and RFI due to routers, wall wart power supplies, CB, AM broadcast and ham radio interference, etc.

Installation is easy. AC power cord through ring filter multiple times and snap on filters on I/O cables nearest computer - problem cured!

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Here is the Coax Noise Filter used to suppress coax common mode currents (works for all type of antennas)

PDF of ZS6BKW at AK6R Construction Article HERE: My ZS6BKW Antenna