TX antenna - 2EL antenna array 4 direction

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!!There is a few ways how to do the right antenna elements tunning. * With SWR LED bar indication *** for directions W or E *** ** Do *[SWR LED bar settings|https://remoteqth.com/wiki/index.php?page=TX+antenna+-+2EL+antenna+array+4+direction#SWR_LED_bar_settings] at first ** TX with your TRX on RTTY (FSK) and tune TRX over the band ** You can see, where is the minimum power in dummy load = best SWR ** You can increase PWR (use PA) and find the minimum ** So if you set full scale of LED bar graf to 200W, and you TX with 2 KW into the antenna, you can see SWR 2:1 range * With SWR meter on your TRX / SWR meter / VNA *** for direction N-S *** ** TX with your TRX on RTTY (FSK) and tune TRX over the band ** You can see, where is the minimum SWR on your TRX / SWR meter / VNA ** YTune around the band and find the minimum * With 2-port VNA or Spectrum Analyser with TG *** For directions W or E *** ** Very nice way how to SEE antenna parameters is with VNA or SA ** Connect TX and RX port with short cable and do calibration ** Than connect TX port of VNA (TG on SA) to the IN port of hybrid ** RX port of VNA (IN of SA) connect to Dummy LOAD port on hybrid ** Connect all antenna elements ** Connect controller ** Now you cas see S21 parameters of antenna ** This will change with direction switching ** You can see the minimum of S21 what is the best SWR of antenna ** Frequency where there is that minimum, there is best SWR of antenna ** For example S21 = -20dB means 1/100 of Input power to dummy load ** On right tunned elements you can have more than -30dB ! what is 1W from 1kW !!! - Return loss (RL) in dB to SWR: ONLINE calculator [RL to SWR|https://cgi.www.telestrian.co.uk/cgi-bin/www.telestrian.co.uk/vswr.pl] [https://remoteqth.com/img/ZAW-WIKI/4sq-8dir/swr1kw.png]
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