SPARC members are all welcome and encouraged to assist at the assembly, repair and erection of antennas at W4GAC. 
Starting at 9:00AM on Saturday 12/16, the tower will be lowered to replace the rotator. At the same time, adjustments will be made to accommodate the center support for the new 80/160 dipole. The south end of the dipole will be attached to a tree near 90th Avenue. The north end will terminate at a new “tower” to be installed at the north end of the property. Finally, a new … Click for more
Posts published in “Antennas”
Ron KP2N and Tom NY4I added a Top Ten Devices Band Decoder to the W4GAC station. This switch ties into the existing Six Pack antenna switch. The idea is that rather than the operator having to select the right antenna, the Band Decoder follows a signal sent from the radio that tells the decoder what band the radio is on at the time. The corresponding position is then switched on the antenna switch. So when the radio is on bands 10m – 20m, the Log Periodic is selected. When … Click for more
The Log Periodic antenna was transferred from its old location atop the shipping containers to the new tower by John, KI4UIP; Donn, N4KII; Dave, KR4U; Bob, N2ESP; and Hal, W1EES. Ron, KP2N replaced the logging computer power supply. With luck, W4TA will be ready for the sweepstakes. Click on title for photos.
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The program for Friday, Nov 4, will be antenna modeling, building simple models and then comparing them to more complex antennas. Ed, NZ1Q will demonstrate EZNEC software, which offers a free demo program that can be easily downloaded. Ed will go through how to build an antenna model and read the resulting charts and graphs for a simple dipole, a two element beam and then as time permits, an Off Center Fed Dipole and other antennas., Radiation patterns, SWR, impedance matching and effects of grounds will be demonstrated.
Be sure … Click for more