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K9AY loop antenna installed at PA6Z Contest group. This is a receiving antennas for the low bands (160m, 80m and 40m). Include schematics and info on a building the control box, preamplifier and low-pass filter

This PDF document provided by AT technologies explains how to build the K9AY loop receiving antenna.

A compact directional receiving antenna

K9AY receiving antennas for PA6Z made by PA9M

K9AY 160M / 80M Receiving Loop Antenna System by K7SFN

Elongated Terminated Loops, usage and details by K9AY Lewallen

A K9AY loop antenna project done with Far Circuits pc boards for the antenna switch and bandpass filter and preamp by K7SFN

A low-band receiving antenna that can fits in a 30-foot circle

It is very compact, low noise and directive with an impressive 20 to 25 dB front to back

Discover the best low band receive antennas for hams with limited space. Learn about the K9AY loop antenna and Shared Apex Loop Array, two alternatives to the traditional Beverage antenna. Understand the concept of Relative Directivity Factor (RDF) and compare the performance of different receive antennas. See how the Shared Apex Loop, patented by Mark Bauman (KB7GF), offers an RDF between 8 and 10dB. Find out how to optimize antenna performance and enhance your receive capabilities on 160, 80, and 40 meters. Explore the world of low band receive antennas with insights from WB5NHL Ham Radio.