All, I have a gap titan and am trying to 'tune' it on 40 and 80. On 80 the center is about 3800kc; I would like to raise this to 3950. Is there a cap to do this?? On 40 the SWR is 2.8 at the low end
All, I have a questions regarding calculating ground impedance. How can this be measured?? The impedance of a loaded vertical measures about 50 ohms, however model programs predict the antenna impeda
Tom, Thank you for your reply. Yes, ground resistance. This antenna is a custom 'screwdriver'. The base is about 4 inch diameter 1/8 inch wall aluminum tubing. The coil is wound on a 3.5 inch form of
Tom, I am trying to increase the efficiency of a center loaded vertical by creating a good ground system. Based on models the antenna 'should' have a have a total impedance of less then 10 Ohms. Yet
All, Screwdriver antennas present an interesting matching problem. When fully retracted, typically 10 meters, the antenna is close to a resonant vertical and has an impedance of about 35 Ohms. Howeve
All, I am looking for the manual for an HF Analyst model SWR 121. I suspect the unit is out of calibration. Does anyone have one of these? Thanks, Dan _______________________________________________