nevesjerry
Member
Hello.
I have been trying to build a vertical passive antenna for reception between LW frequencies up to about 30 MHz. Please note I do have an RF Systems GMDSS PASSIVEantenna that works quite well at the above frequencies, However, I have tried to wrap copper foil on a 6 foot piece of PVC pipe. Decided to attach a 9:1 balun and connected a coax cable at end. Very poor reception! The RF Systems antenna discribed above uses a spiral like wound wire, as far as the balun they use I have no idea! Should there be a balun? Should I use a different balun? Also when you use coax cable for transmission line, where is the ground part of the balun attached to in the spiral wound write in the PVC? What am I dong wrong?
Any help appreciated.
Thanks, Jerry
I have been trying to build a vertical passive antenna for reception between LW frequencies up to about 30 MHz. Please note I do have an RF Systems GMDSS PASSIVEantenna that works quite well at the above frequencies, However, I have tried to wrap copper foil on a 6 foot piece of PVC pipe. Decided to attach a 9:1 balun and connected a coax cable at end. Very poor reception! The RF Systems antenna discribed above uses a spiral like wound wire, as far as the balun they use I have no idea! Should there be a balun? Should I use a different balun? Also when you use coax cable for transmission line, where is the ground part of the balun attached to in the spiral wound write in the PVC? What am I dong wrong?
Any help appreciated.
Thanks, Jerry