2012

2012

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• A Short Course On Baluns - An interesting article on basics about Baluns, intoducing the skin effects on radio frequency currents and its effects on receiving and trasmitting article by VE7FO
  [ Hits: 347 | Votes: 1 | Rating: 10 ]
• Build your own HF balun - A balun is a MUST for dipoles or similar antennas when they are feed with coaxial cable. From the RF point of view, the shield can be modeled as two conductors, the internal shield (the real shield, this is, ground) and the external shield, who is really far to be ground. In this way, your dipole has 3 arms, the two from the dipole and the coaxial cable shield (external face)
  [ Hits: 248 | Votes: 1 | Rating: 10 ]

• Modifications to the Diamond V2000 and similar antennas - This kind of antenna has grown in popularity over the last years because it gives you a decent performance and triband capabilities. But its 50 MHz design is far from optimal. Here you can learn how to improve its 50 MHz performance in a very easy way.
  [ Hits: 631 | Votes: 2 | Rating: 9.5 ]

• Build a W3DZZ Antenna - The purpose of this construction is to enable the realization of an HF antenna called W3DZZ with minimal equipment and low cost. It allows traffic on the bands 3.5 / 7/14/21 and 28MHz.
  [ Hits: 219 | Votes: 1 | Rating: 1 ]

• The Great Ham Radio Desk Project - A great amateur radio shack desk done with a second hand solid core door, measuring 32 inches wide by 80 inches long.
  [ Hits: 433 | Votes: 2 | Rating: 8.5 ]

• Field Day Operations in Australia - A page with lots of pictures of John Moyle Field Day 2012 operating from 80 meters to 70 centimeters
  [ Hits: 98 | Votes: 0 | Rating: 0 ]

• Smart SO2R Antenna Switcher: A DIY Solution - In pursuit of enhanced station efficiency, the author describes crafting an Arduino-based smart antenna switcher for an SO2R setup. Faced with manual antenna switching challenges during contests, the project utilizes a Logos Electromechanical 4x4 Driver Shield and a Power Screw shield for seamless functionality. Despite its raw appearance, the automatic switcher proves indispensable in contest scenarios, prompting considerations for future improvements and standardization of station control protocols.
  [ Hits: 154 | Votes: 0 | Rating: 0 ]

• KX3 GoBox 2012 - This KX3 go-box weights 1,6 kg including the components and the KX3 with its ATU and filter-option installed (no internal batteries) and a light-weight headset
  [ Hits: 212 | Votes: 3 | Rating: 6 ]

• VHF UHF Low noise Amplifiers - 2m 70cm 23cm Low noise Amplifiers, 3 Low noise amplifiers Outdoor unit with DB6NT parts completed.
  [ Hits: 128 | Votes: 2 | Rating: 5 ]

• How RTL-SDR dongles work - Since 2012, the RTL-SDR is the simple and cheap way to give Software-Defined Radio a try. For about 25 euro you get a receiver covering much of the VHF and UHF range, and by either adding an upconverter, or using the direct sampling option, also the HF bands. They are so cheap because they are mass-produced as DVB-T receivers.
  [ Hits: 129 | Votes: 1 | Rating: 10 ]

• Anderson Powerpole Polarity Checker Project - A polarity checker is a very useful item to have around the shack and in a go-kit. This project, inspired by a QST article on powerpole connector protection illustrate how to build a polarity checker.
  [ Hits: 168 | Votes: 0 | Rating: 0 ]

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