brizzotheizzo
Member
- Joined
- Aug 7, 2016
- Messages
- 53
I am building a dipole antenna. I know that the feedline needs to be approximately 1/2 wavelength in length (or factors there of) for best SWR. However, there is one item of confusion. I am making an RF choke by coiling the feedline at the base of the antenna. Do I include the length of coax in the coil as part of my “feed line length“ when calculating the 1/2 wavelength feedline length?
what about if I use a premanufactured one to one Balun/choke. Some are made by “coiling” coax Inside. This unit will sit between the feedline and the antenna connector. Technically, I would consider this part of feedline length. But I’m just not sure when calculating.
my plan is probably to just make my own air balun / choke by coiling the feedline.
I have included a picture below just for reference. This is not mine. I am still in the planning phases.
what about if I use a premanufactured one to one Balun/choke. Some are made by “coiling” coax Inside. This unit will sit between the feedline and the antenna connector. Technically, I would consider this part of feedline length. But I’m just not sure when calculating.
my plan is probably to just make my own air balun / choke by coiling the feedline.
I have included a picture below just for reference. This is not mine. I am still in the planning phases.