This thread has wandered away from the choke between amp and exciter or whatever(never would do this but that has been beat to death )to what choke impedances are and the measurement errors that can be encountered.
One thing that has always bugged me is very very few of these discussions ever seem to consider what impedance the choke is working between. Seem to me if you dont know that it really does not matter what the choke impedance is at some frequency. Which leads me to ask - what is wrong with measuring the attenuation with a two port VNA with the choke simply in series between port 1 and port 2 ?(of course calibrating out any cables if used) This is basically a "VI" measurement and seems to me to give valid measure of the atteuation if the load impedance presented to the choke is 50 ohms and the choke is driven from a 50 ohm source. ????? Hank K7HP _______________________________________________ UR RST IS ... ... ..9 QSB QSB - hw? BK
