Hey All, I put up an Array Solutions K9AY RX Antenna this summer for 80m/160m. The antenna is placed over rich marshland (freshwater). In fact we've had so much rain that its nearly over a pond. I ha
Your problem is more than likely the result of interaction with the transmit antenna (but you suspected that already). As a quick test, listen to a European station on 80 with the K9AY pointed SW. Th
Scott and Jerry, I am most interested in this thread so thank you for starting it. Scott, I find that my Array Solutions K9AY gives me about a 6 to 15 db directivity between front and back. Some sign
After several winters experimenting with K9AY loops here, I have reached a few conclusions that others haven't touched on yet. I can't comment on interaction, because my RX antenna is over 300 feet f
Pete, Thank you for this thought provoking e-mail. I had never thought of using a common mode current choke. Is this choke mounted at the K9AY or close to the shack? I will give this a try. Another p
Hi Jerry, Easy enough for me to try, My transmit loop is hooked to a switchbox that will ground it when i switch it off. Good point though, the length of the feedline will determine if the transmit l
Doug ... I was going to suggest the same thing as Pete - common mode isolation. I have a homebrew K9AY about 2/3 normal size due to space constraints here. It is actually disguised inside an ornament
Hi All, I just made 8 turns through two 2.4" #31 cores with the coax (RG8X). at the feedpoint I have some #31 split beads I will clamp onto the control cable (when it stops raining!). The coax is a 1
I strongly agree with Pete. See the Choke Cookbook in my RFI and Ferrite tutorial for more advice on winding the chokes. http://audiosystemsgroup.com/RFI-Ham.pdf Fair-Rite's #31 materials is FAR supe
If you like what you get with "several turns," try more turns, guided by my choke cookbook. Don't bother with clamp-ons unless they're big enough to put a lot of turns through them. Single turn clamp
I tried a K9AY loop and mine worked pretty well on 160m. On 80m my TX antenna was a 90+ ft long rotatable homebrew dipole at 160ft high about 350 ft away and I don't recall ever hearing a station on
Gary K9AY helped me put up a single K9AY loop broadside NE/SW back in about 1995 or 6. I used one 8 foot ground rod already in the ground from an old grounded half loop I had up several years before.
I'm guessing that the transmitting antenna is going to need some real work to get it appropriately detuned. Remember, the K9AY is lots of dB down in absolute signal level, meaning its rear null is ve