Hello. Hopefully someone can clarify the following question. I have a passive antenna for coverage of the frequencies of about 100khz to about 30 MHz. It's a 6 foot antenna, vertical made by the defunct RF Systems Co. Holland.
It uses a feeder of Coax cable with 2 PL259s. The connection at bottom of antenna has an SO 239. I get pretty good results with this antenna and is not too noisy. My question is how to build an antenna like this as I have no way to cut open the antenna and visualize what's inside, unless I want to ruin the antenna. Would you think they use a coil of wire inside the unit? If so, I wonder how much wire is there? And finally the SO 239 at bottom of antenna unit means there would be a ground inside the unit? Would this be another wire?
Any clarification on these questions would be appreciated.
Best regards to all.
Jerry