Hi Paul, Thanks for the info regarding your measurements. I believe you use a ScopeMatch in the shack to make your tuning adjustments and voltage/current measurements. I also run a ScopeMatch on LF a
Hi Rob, I would of course agree the ScopeMatch isn't a precision instrument. I find it reasonably accurate in that if I key up the transmitter and measure I / E and see that they aren't equal, do the
Hi Paul, I think the scope match may be an old method but is advanced because it shows not only the magnitude of voltage and current and the phase between them, it also shows the waveforms at the pow
I agree Stefan! And in my opinion if the transmission line is shorter than 1/10 of the wavelength ALL the impedance adjustments can be performed at the Transmitter side of the line. So the impedance
David, When you say tuning changes do you mean resonant frequency (where reactance is zero), antenna system resistance, or both? Mine seems to stay resonant OK, but the resistance is highly variable,
Hi Stefan, I agree. The scope match may be an old idea but it is still very useful. Most VNA's output low power, some as low as -20 dBm, some maybe up to +10 dBm. They make very accurate measurements
