Posts Tagged ‘Antennas’

ANSR – Arizona Near Space Research work

After having taken a break for a few years, I have renewed my membership in the Arizona Near Space Research group.  This is a club that specializes in high-altitude balloon launches that carry payloads typically designed and built by students ranging from Jr. High to Post Graduate levels.  I was involved in the club shortly […]

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Trap Dipole for the Mesa QTH

In preparation for the Novice Rig Roundup, I was reminded of my poor state of affairs for low band operation at my Mesa QTH.  I had put up a quick 40-meter dipole about 5 or 6 years ago, but it was only about 15 feet off the ground.  This did not do a very good […]

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43′ Vertical Final Tuning

After acquiring an Antenna Analyzer (MFJ-269B), I set the matching network on the bench and began playing with it.  I had a theory that I could simulate the antenna load at various frequencies by placing a capacitor in series with a resistor of various values for the different frequencies.  Then by attaching that to the […]

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Tilt-Over Support for 43′ Vertical

I took the two grandsons up to the Ranch in mid-June to help with construction of the 43′ vertical tilt-over support. The idea is to be able to easily tilt the vertical down to a “stowed” position before I leave for an extended period of time. It shouldn’t hurt to have that capability in case […]

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T-Bias interface

I had a comment a few weeks ago asking for more details about the T-Bias device used to send DC over the active RF coax to my 43′ vertical antenna. This is used to switch the matching network such that: 0 volts = 60 – 6 meter operation +12 volts = 80 meter operation -12 […]

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