The Cobra Antenna Is A Folded Dipole The original Cobra antenna was designed by W4JOH and it’s still being used in the amateur radio cosmopolitan universe. The 80 meter version is considered the standard, simply because it covers nearly all of the bands, and it covers them well. Pertaining to the uber popular 80 meter […]

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With → WebSDR a Software-Defined Radio receiver connected to the internet, allowing many listeners to listen and tune it simultaneously. There appears to be a recording feature which enables the user to record and listen to the playback. Frequently Asked Questions can be found here. There’s a map on the bottom of the page that […]

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As any experienced ham already understands, propagation is important, but having a good antenna is also critical. If you’re running a Yaesu mobile radio, then you might be interested in this antenna: Yaesu ATAS-120A 40 Meter through 70cm Auto Tune Motorized HF/VHF/UHF Antenna For FT-857D, FT-450DandFT-897D ATAS-120. I was listening to a ham in the […]

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After opting for yet another computer upgrade, I decided to pull the SDR dongle from the shelf and give it a go. Installation can be a hassle, but there’s one particular thing that is usually forgotten. TIP REMINDER The dongle must be plugged in before installing the SDR Sharp software.

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My aim was to build a 20 meter vertical out of copper, since copper is normally a very good conductor. Recently I bought a couple sections of copper pipe and clamped them together. The sections were 10 feet in length. I may later put up some elevated radials, but for now I am experimenting with […]

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As an amateur radio operator, are you interested in digital voice for HF radio? What if you could go digital for just a couple hundred dollars? Thanks to new open source technology, this has become a reality. This is innovative and something to keep an eye out for. Digital technology for VHF radio is coming […]

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The Baofeng UV-5R V2 is turning out to be a very popular handheld transceiver for ham operators. It seems like the children are using it for a scanner and FM radio. The Bofeng dualband is so cheap that these little ham radios are flying off of the Chinese shelves. It may be from China, but […]

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If you were listening to HF radio on September 10, 2014, you would have discovered that the bands dropped out completely for several minutes. At 1:45 p.m. EDT (1745 GMT) on Wednesday, a major solar flare disrupted radio communications. Aurora watchers in the northern U.S. should be looking for possible activity both Thursday and Friday […]

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Director 975/F Full Wave Driven Element 1005/F Reflector 1030/F Spreaders A2 + B2 = C2 Polarization Fed on the side = Vertical polarization (VHF) Fed on the bottom = Horizontal polarization (HF) Matching Stub (75 Ohms) 984/F x Velocity Factor divided by 4 Calculator Cubical Quad Antenna Calculator (Will include spacing) Note A cubical quad […]

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The YAESU FT-991 transceiver is displayed at the Ham Fair Tokyo in 2014.

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