1. 2sudsy

    My QFH antenna project

    This is a powerpoint presentation of a quadrifilar helix antenna for 136 mhz. I built it from parts at my local hardware store. https://dl.dropboxusercontent.com/u/83615241/quadrifilar%20helix.ppt
  2. A

    QFH antenna for 435mHz question

    Hello, I've taken it upon myself to build a QFH antenna for 435mhz to receive Amsat signals. I'm at the point (shown here in it's current state http://i.imgur.com/xT6Ylxu.jpg ) where I wire everything up a la this image, http://jcoppens.com/ant/qfh/img/coax/coaxconn1.jpeg I understand the top 2...