Recently, members of Sacramento County ARES got together to build a 20/40 meter trap dipole antenna with a homemade balun. This was a fun project that gave us an opportunity to get some hands- on experience with antenna making. Members built their own baluns (a simple 1:1 voltage balun) and a pair of 20 meter coax traps. We then took wire and assembled the antennas, then hoisted them up and tuned them. We ended up with a useful little antenna that works verywell on 20 meters while giving good performance on 40 meters with the added advantage of being shorter than a standard 40 meter dipole.
Builders were Carl Chapek KK6RAS, James Chin KK6FON, Eric Guenzler KG6BZT, Jennifer Hughes NS3O, Terry Johnson KI6KWX, Dennis Klaman N6KLA, Mike Meighan KD6ILC, Robert Reis KK6HZF, Lee Rominger W6LFR, Noel Seeley KJ6WOK, Bonnie Sellstrom KJ6WOK, and Tim Thorson KD6HOF. Fred Sellstrom W7KOZ and Mike Abernathy NM3S assisted the builders. Fred and Bonnie Sellstrom were also kind enough to invite us to use their shop and land to do the build. Fred also set up a very nice rig for hoisting antennas up for tuning and helped everyone in numerous ways.
Mike Meighan KD6ILC and Dennis Klaman N6KLA working on their baluns
Building baluns. Left to right, James Chin KK6FON, Noel Seeley KJ6WOK, Lee Rominger W6LFR (in background), Mike Abernathy NM3S (in foreground) and Tim Thorson KD6HOF
A completed balun
Building traps. Left to right, Terry Johnson KI6KWX (in foreground), Bonnie Sellstrom KC6PSZ (in background), Mike Meighan KD6ILC, James Chin KK6FON, Tim Thorson KD6HOF (in front) and Lee Rominger W6LFR (in back).
A completed trap
Getting ready to hoist one antenna while adjusting another. Left to right Noel Seeley KJ6WOK, Robert
Reis KK6HZF (in background) and Fred Sellstrom W7KOZ (in foreground)
Hoisting an antenna up for testing. Left to right Noel Seeley KJ6WOK and Fred Sellstrom W6KOZ
Checking the SWR on an antenna, Mike Abernathy NM3S
HF Antenna Build
20/40 Meter Trapped Dipole Antenna Build