9 simple

9 simple

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• 160 meter antenna problems and solutions - The quarter-wave Marconi working against ground is a popular and inexpensive antenna for 160 meters. A lot of newcomers to the band favor this simple antenna because it's easy to put up, it isn't too big, and it works.
  [ Hits: 107 | Votes: 0 | Rating: 0 ]

• Vertical Dipole Antenna for 14 MHz by G3PND - An home made vertical dipole antenna made with simple material. The antenna has a total length of aproximately 16 feet. In this article appeared on June QST 2019, the author explain how he reached the optimal confirugation changing and adjusting the lower part of the antenna, trimming and spacing correctly the copper wire. PDF File to downloas
  [ Hits: 1224 | Votes: 3 | Rating: 4 ]

• 43 Elements Yagi Antenna for 23cm band - An interesting presetnation full of usefull tricks to correctly design and build 23 cm Yagi using simple tools. The basic design of the antenna presented in this document is taken from the original DL6WU Yagi Design published in 1982
  [ Hits: 436 | Votes: 1 | Rating: 8 ]

• Six Meter Quad Turnstile Antenna - Simple 6 Metre DX Antenna based on an article by LB Cebick in QST May 2002 on a Quad Turnstile antenna. This antenna is basically two full wave loops mounted at right angles fed 90 degrees out of phase to produce an omni-directional horizontally polarized pattern
  [ Hits: 702 | Votes: 2 | Rating: 9.5 ]

• 40 meter portable dipole for QRP operations - Schematic drawing and instructions for the construction of a simple portable dipole for use in low power and portable operations
  [ Hits: 264 | Votes: 0 | Rating: 0 ]

• Magnetic Loop 600 KHz-4MHz - The antenna is built on a cross-shaped frame with spar width (and height) of 48 inches, providing a height of 52 inches and a width of 49 inches. This antenna costs only about $45 to construct and can be built in just a few hours using simple hand tools. The best part is that the performance on 160M and 80M is excellent
  [ Hits: 173 | Votes: 3 | Rating: 4.33 ]

• ZR6KMD 20m Field Dipole - A simple drawing schematic of a portable field dipole for 14 MHz with dimensions in meters and instruction for setting up the antenna and to store the radial for easy transportation
  [ Hits: 518 | Votes: 3 | Rating: 7.33 ]

• Antenna Tuner Basics - In search of the perfect antenna - An article that explain with simple concepts and basic theory the correct usage of antenna tuners. It covers some aspects of common questions newcomers have on what antenna tuners are for, and what antenna tuners will never do.
  [ Hits: 476 | Votes: 0 | Rating: 0 ]

• Long Wire Antenna for portable operations - With the view to establish a quick and easy multi-band antenna deployment for portable and camping operations a simple long wire antenna with an earth or earth plus counterpoise arrangement with a 9:1 voltage unun including a tuner or simply with a tuner is one possible solution. With the 9:1 voltage unun and wire lengths suggested in the below tables the antenna should present non extreme impedances for all HF amateur band frequencies. This page is far from complete and represents the ongoing investigation into this type of antenna. Experiments to date seem to have raised more questions than obvious answers.
  [ Hits: 804 | Votes: 13 | Rating: 8.69 ]

• The UHF Bicycle Antenna - Homebrewing a UHF antenna to be used on a bicycle. This simple project gives you the right hints on how to build and setup and install a 70cm antenna on a bicycle.
  [ Hits: 192 | Votes: 0 | Rating: 0 ]

• TS-590S audio noise - With high impedance earphones plugged into the audio jack on the Kenwood TS-590S or TS-590SG, you can hear a really annoying noise even with the AF volume set to zero. A simple quick-and-dirty solution is a resistor in series to the audio output.
  [ Hits: 130 | Votes: 1 | Rating: 9 ]

• Yaesu FT-817 FT-857 FT-897 EEPROM analyzer - A Java multiplatform application used to find EEPROM locations for different radio settings. a very simple to use multi-platform Java application which can be used to find EEPROM locations for different transceiver settings. This information can then be used to send the right CAT commands to configure the radio remotely. Use this application on your own risk.
  [ Hits: 288 | Votes: 1 | Rating: 10 ]

• A Simple Dual-band Transceiver - This a well performing, simple two band transceiver. The transceiver design is inspired by the S7C superhet. A dual-band transceiver with a crisp receiver and a clean SSB signal
  [ Hits: 99 | Votes: 1 | Rating: 6 ]

• Computer headset adapted for Ham Radio Usage - Adapting a common PC earphone with microphone to connect to a transceiver via a homemade pre-amplifier, using a simple chip with aprox 10 db gain. Includes a schematic diagram
  [ Hits: 186 | Votes: 0 | Rating: 0 ]

• JBOT QRP linear amplifier - JBOT stands for Just a Bunch of Transistors. It is a simple, stable and easy to build 5 watts linear amplifier build out of a bunch of ordinary low power NPN transistors.
  [ Hits: 83 | Votes: 0 | Rating: 0 ]

• General Coverage Receiver LW MW SW - This is a compact three transistor regenerative general coverage receiver with fixed feedback. The sensitivity and selectivity is relative good, especially on the LF and MW bands, as can be expected with this simple design.
  [ Hits: 197 | Votes: 0 | Rating: 0 ]

• Simple 2.4 GHz SWR Meter - This is a simple 2.4 GHz SWR meter which is based around surplus microwave hardware which can be easily found. The main component is a MECA -20/-20 dB Directional Coupler which has a frequency range of approximately 700 MHz to 2.5 GHz.
  [ Hits: 144 | Votes: 2 | Rating: 6 ]

• SDR Receiver with RTL-SDR and Gnu Radio - This project is a Software Defined Radio Receiver. It has a frequency range of 24MHz 1.2GHz. It can demodulate AM, FM, USB, LSB with selectable bandwidths of 600, 2400, 2800, 3200 and 6400Hz. Using a simple RTL-SDR Dongle and Raspberry Pi 3 computer using GNU RADIO
  [ Hits: 485 | Votes: 1 | Rating: 1 ]

• Specan Spectrum analyzer - The Specan is actually a very simple but robustly built receiver. it is, in essence, a double conversion superhet receiver with 112 Mhz and 12 Mhz Intermediate frequencies. The first mixer uses an Si570 as the local oscillator. The Ardiuno that controls the Specan is a very flexible microcontroller board that you can program in simple C language
  [ Hits: 86 | Votes: 1 | Rating: 9 ]

• 4m QRP Transverter - There are few equipment for the 4m band, so to get on the band it could be necessary to design and build a simple transverter.
  [ Hits: 96 | Votes: 0 | Rating: 0 ]

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