K9AY loops

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The K9AY is terminated loop. It consists of a wire loop of any convenient shape (diamond, delta, etc), hung from a single support and with a ground rod at the bottom. A 9:1 impedance-matching transformer is connected from one end of the loop to the ground and terminating resistor is connected the other end of the loop to the ground. This antenna is directional. Favoring signals are arriving from the feed point end. You can also change the antenna far field by changing RLOAD (RTERM) of the loop.

Main functions:


Fixed

Variable



New SMD version since 3/2022


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K9AY
Manual in WiKi WiKi manual
Antenna loop design examples WiKi loop design
YOUTUBE videos YouTube
rev 3.1 variable.sch pcb eagle523
rev 2.4 variable.sch pcb eagle523
rev 0.1 fixed.sch variable.sch pcb eagle354
CONTROLLER DC example DC controller example
CONTROLLER ACDC example AC/DC controller example
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Users implementation photos


by F1SRC

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PD9X