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Posts published in “Antennas”

W4TA back in Contest Mode…New Antennas Work Great

With the completion of the relocation of our Log Periodic antenna on our new tower and the erection of a temporary dipole for 40M/80M, W4TA is on the air. The tower puts the antennas up around 55 feet. And boy do they work well in combination with the Alpha 9500 amplifier. We inaugurated the antenna/amplifier combination in the CW Sweepstakes contest, the oldest contest in amateur radio. It was no effort to hold a frequency and it was fun to hear the pile ups focused on us.

Congratulations to all Click for more

Log Periodic Antenna Moved

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 LP antenna removed from shipping containers.
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The LP antenna installed on new tower.

Antenna Modeling with EZNEC

 

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

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