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• Homebrewing a 6 Meter Yagi - In this PDF article Zack Lau describe how to homebrew a four element yagi beam antenna for 50 MHz band, including how to build mounting blocks and tubing clamps to hold elements.
  [ Hits: 965 | Votes: 2 | Rating: 5.5 ]

• Portable Vertical Antenna for 40 and 75 - Portable Vertical Antenna for 75m and 40m featuring Low radiation angle for DX, easy to install and to match 50 ohms
  [ Hits: 3933 | Votes: 7 | Rating: 7.14 ]

• The Copper Cactus J-Pole - Original article published on February 1992 on 73 Amateur Radio Today about the 2m and 70 cm copper cactus J-pole antenna
  [ Hits: 1718 | Votes: 2 | Rating: 10 ]

• Magnetic Loop Antennas - A complete guide to magnetic loop antenna construction, with analysis of multi-turn and single-turn magneti loops, and and insight on choosing the optimal capacitor, or homebrewing your own butterfly capacitor
  [ Hits: 1251 | Votes: 1 | Rating: 10 ]
• Magnetic Loop Antenna for 40-20m - If you have space constraint at your QTH for a HF antenna, you can try contructing this HF magnetic loop antenna for 40-20 meters bands
  [ Hits: 1529 | Votes: 2 | Rating: 3 ]
• The Midnight Loop - An Experimental, High-efficiency, Graphic-Tunable Magnetic Loop antenna and loop controller in a 52 pages PDF presentation with drawings and pictures
  [ Hits: 1175 | Votes: 2 | Rating: 8.5 ]

• K8CY - The Ashtabula County Amateur Radio Club - The Ashtabula County Amateur Radio Club is a group of amateur radio operators (Hams) in Ashtabula County, Ohio. We dedicate ourselves to all aspects of amateur radio communications, from emergency communications, to social gatherings, to contesting. Our club is open to anyone wanting to learn and participate, regardless of licensing.
  [ Hits: 185 | Votes: 2 | Rating: 10 ]

• ARRL NTS - ARRL National Traffic System, During disasters or other emergencies, radiograms are used to communicate information critical to saving lives or property, or to inquire about the health or welfare of a disaster victim.
  [ Hits: 275 | Votes: 1 | Rating: 1 ]

• UltraPortable Amateur Digital Communications - A group for sharing, learning or presenting practical ideas and field experience for Ultra portable ham radio digital comm
  [ Hits: 412 | Votes: 0 | Rating: 0 ]

• Batteries For Portable Ham Radio Use - An interesting article on choosing the right battery when operating in portable mode, considering charging time and modes, weight and size.
  [ Hits: 777 | Votes: 2 | Rating: 5.5 ]

• TransWorld TW2010L Review - A brief review of the TW2010L Backpacker Antenna. This is a portable vertical antenna covering 10,12,15,17 and 20m
  [ Hits: 424 | Votes: 2 | Rating: 9.5 ]

• RM VLA 200 schematic - Schematic diagram of the VLA 200 power amplifier by RM Italy
  [ Hits: 891 | Votes: 5 | Rating: 6.4 ]

• Repairing a TE-Systems 1452G - Slides of a TE systems 1452 reparation including the schematic diagram of this monoband VHF RF Power amplifier
  [ Hits: 488 | Votes: 4 | Rating: 7.25 ]

• Yaesu FT-2800M Service Manual - Technical supplement with schematics of the Yaesu FT-2800M Yaesu Transceiver
  [ Hits: 943 | Votes: 8 | Rating: 7.51 ]

• PL259 Surge Arrestor - A sourge arrestor for PL 259 connectors. A voltage surge arrestor to limit the voltage that may come back down the wire or coax after there has been static build up
  [ Hits: 1431 | Votes: 1 | Rating: 10 ]

• Microwave 101 - Our goal is to provide the microwave community with a practical and ever-growing resource covering all of the fundamental principles of microwave design.
  [ Hits: 224 | Votes: 0 | Rating: 0 ]

• A Simple SSB PEP Measuring Procedure - The correct procedure for measuring SSB PEP (Peak Envelope Power), using an oscilloscope with a vertical bandwidth of at least 20 MHz, or a monitor scope.
  [ Hits: 424 | Votes: 0 | Rating: 0 ]

• How to convert Server Power Supplies - The practice of converting computer server power supplies to make a very high quality high power supply at low cost is attractive. It doesn't normally require any modification to the supply but the hard part is figuring out how to trick them into turning on.
  [ Hits: 822 | Votes: 0 | Rating: 0 ]

• GaAs FER Pre Amp Cookbook - There are many designs for building preamps each with their own advantages and disvantages. In this PDF Article author reviews several different types.
  [ Hits: 699 | Votes: 0 | Rating: 0 ]

• Precision VXO - The Precision VXO (PVXO) and its matching Crystal Test Fixture (CTF) were created to provide a low cost means of evaluating the characteristics of crystals and a means of measuring their series resonant frequency.
  [ Hits: 210 | Votes: 1 | Rating: 1 ]

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