This is small four directional RX antenna for lower HF bands. Ideal for portable use as well as for home installation. Antenna has got Band Pass Filters and Preamplifier in the feed point of the loops. It is advantage of filtering and amplification small signals directly from antenna. Controller is able to control also Bi-directional 4-way system.
The K9AY is terminated loop RX antenna. 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 a terminating resistor is connected the other end of the loop to the ground. Antenna has got Band Pass Filters and Preamplifier in the feed point of the loops. It is advantage of filtering and amplification small signals directly from antenna. 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. Feeder box consists of directional switch relay, variable and fixed Rload, matching transformer from end protections, BPFs for 3 low bands, preamplifier and common-mode filter. Controller allows you to switch all this features over one control cable (8 wires) and there is also Remote Control DB-15M connector for external remote control. This set includes the RF feeder box and the controller.
To buy (https://hamparts.shop/)
459.80 €