Presentors:
Lee Barrett K7NM
Collateral or Slides:
C-Match QSO Roundup K7NM Slide-notes Lee Barrett.pdf


Level: Intermediate
Category: Antennas and Transmission Lines
Time:

   PDT: September 9, 2023, 12:00 pm
   UTC: September 9, 2023, 7:00 pm

Duration: 1 hour

Add to calendar

I spent 25 years looking for a way to easily phase antennas without expensive test equipment such as operational RX bridges and calibrated field strength meters. Using a combination of broadcast and amateur antenna techniques and taking advantage of some transmission line theory, I found a way to build an array using a low cost RX bridge (MFJ, VNA, etc.) to cut the transmission lines. Only low cost SWR bridges (perhaps CB type) are required to tune the array and achieve a near textbook pattern. Another advantage is that the pattern holds together over an entire band rather than only a few kilohertz common to other methods. The presentation will cover the basic approach and overview. A book on it is available through DX Engineering for those who want to dive in further.

Lee Barrett K7NM