K9AY feeder with BPF

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!Antenna GROUND * '''The K9AY antenna doesn't work without ground. ''' * It loses the f/b directivity. * This means that it needs good ground! * A 4-foot ground rod (such as 3/4” diameter copper pipe) is often sufficient. If the earth is very dry, a longer ground rod is advised, to reach permanently moist earth—or you may install four or more 15- to 20-foot long radial wires for better coupling to ground. The grounded design of the K9AY Loop has several advantages over ground-independent versions of the terminated loop (Pennant and Flag), including simpler switching, no feedline isolation problems, and greater signal capture for the same size loops. [source K9AY: AY Technologies|https://www.aytechnologies.com/TechData/HowToBuild.pdf] !!! Connecting the GND * As you can see on the pictures, there is common GND on the screw under loops connections and also on the aluminium holder. * '''You can mount box directly on the GND rod.''' * [CMCC - Common-mode current chokes:|https://remoteqth.com/commonmode.php] are recommended for Coax and control cable. [https://remoteqth.com/img/ZAW-WIKI/k9ay++new/k9ay_ctrl_cmcc_850.jpg|noborder] [https://remoteqth.com/img/ZAW-WIKI/k9ay++new/k9ay_grounding_new_850.jpg|noborder]
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