Measurement results 2EL. DK7ZB Yagi at 20 meters

15. February, 2009

Meranie DK7ZB yagi — Measurement DK7ZB Yagi

Antenna analyzer had to answer some properties DK7ZB Yagi at 20 meters. Since aluminum boom was available, I used to test the long iron rod. Fastening elements on the boom is simple. Small aluminum stožiarik with 4.5 m height was to break. Placing the antenna which only compounded by the amount of weight of the boom and a number of cables garden – telephone lines, 5-band dipole, enlarged mast, garden tree house.

First I turned to an antenna, that was the furthest away from the house. Reflector cruise telephone cable. Antenna Analyzer showed resonance below the band. I turned the antenna around 50 degrees and there are measurement results 2el. DK7ZB Yagi for 20 m in height 4.5 m:

Frequency	Impedance	SWR
13,85 MHz	94 + j0 ohm	1,89
13,90 MHz	87 + j0 ohm	1,74
13,95 MHz	77 + j0 ohm	1,56
14,00 MHz	66 + j0 ohm	1,33
14,05 MHz	63 + j0 ohm	1,26
14,10 MHz	57 + j0 ohm	1,15
14,15 MHz	52 + j0 ohm	1,05
14,20 MHz	50 + j0 ohm	1,00
14,25 MHz	48 + j0 ohm	1,03
14,30 MHz	46 + j0 ohm	1,06
14,35 MHz	45 + j12 ohm	1,32
14,40 MHz	43 + j21 ohm	1,60
14,45 MHz	41 + j26 ohm	1,88
14,50 MHz	40 + j31 ohm	2,06