K9AY loop feeder with BPFs and preamp

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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:

Band Pass Filters characteristic:


160m BPF

80m BPF

40m BPF

Band Pass Filters characteristic with preamplifier:


160m BPF with preamp

80m BPF with preamp

40m BPF with preamp

BYPASS with preamp

Download

K9AY
Manual in WiKi WiKi
rev 1.3 schematic.sch pcb eagle99
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