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Alexis

adjusting the gamma capacitor/rod can only cancel reactance,

it can't adjust the resistive part, you adjust R by sliding the gamma strap up or down,


remember that when measuring resonance ( not vswr ) through coax, the coax will cancell reactance in the antenna too,


causing x=0 to be somewhere other than where the antenna is resonant unless you are VERY lucky & the antenna is resonant on a frequency where the coax is an electrical 1/4wave or multiple electrical 1/4waves. ie 1/2wave 3/4wave 1wavelength etc,


tuning for x=0 through your coax does not mean the antenna is resonant,

it means the system ( coax + antenna ) are resonant.