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• 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: 1225 | Votes: 3 | Rating: 4 ]

• The Magloop Antenna Calculator - The Magloop Antenna Calculator was developed to predict the characteritics of a small-loop (aka magloop) antenna, given physical dimensions entered via slider widgets. This magnetic loop antenna calculator works also on most mobile devices, adjusting sliders and calculating dimensions in real time.
  [ Hits: 298 | Votes: 5 | Rating: 8.2 ]

• How to Tune Dipole Antennas - This is a standard calculation method that can help you while tuning dipole antennas, by adjusting wire lengths. This method can be used also when you need to add lenght to your wires, and can be additionally used to quarter waves vertical antennas
  [ Hits: 336 | Votes: 5 | Rating: 8.6 ]

• Simple J-Pole for the 2m band - A very essential j-pole antenna for 144 MHz. To adjust the SWR you will have to play with the 40mm distance between the coax feed and the braid inner conductor connection
  [ Hits: 174 | Votes: 0 | Rating: 0 ]

• Outdoor 80m/40m bands Magnetic loop antenna - No matching adjustments needed. Directly perfect match to 50 Ohms using a remotely switched wideband transformer
  [ Hits: 225 | Votes: 0 | Rating: 0 ]

• G7FEK antenna revisited - A different implementation of the G7FEK HF multiband antenna with some adjustments and modifications
  [ Hits: 498 | Votes: 2 | Rating: 7.5 ]

• Homebrew an OCF Off-Center Fed Dipole Antenna - This type of antenna is a popular antenna design as the performance is very good across the HF bands and requires little or no tuning. It’s a dipole fed off center with a 4:1 balun at the offset feed point. The antenna shown covers 80, 40, 20 and 10 meters. The formula can also be used to adjust the overall length to cover more or fewer bands and the resulting overall length. 160-10m, 80-10m or 40-10 meters depending on your available space. Other bands will require a tuner.
  [ Hits: 198 | Votes: 3 | Rating: 6.67 ]

• Adjusting HF Yagi Gamma Matches - There are many feed systems used in yagis over the years. Gamma matches are not as common as they once were. More typical are beta matches and T matches to convert the low impedance of a yagi to 50 ohm.
  [ Hits: 132 | Votes: 1 | Rating: 10 ]

• The Squid Pole Wire Antenna Re-visited - The author explores enhancing the performance of a 7-meter fiberglass squid pole wire antenna for amateur radio. The wire, resonant at 10MHz, poses impedance challenges on various bands. Experimenting with direct coax feed and UN-UN transformers, the LDG Z11-Pro2 auto-tuner is found effective but may show deceptive SWR readings. The author employs adjustable UN-UN ratios and introduces a custom "porcupine" coil to optimize the antenna's efficiency.
  [ Hits: 91 | Votes: 0 | Rating: 0 ]

• W6LVP Loop Antennas - Magnetic loop receive antennas manufacturer. W6LVP loops cover 2200 through 10 meters (135 kHz through 30 MHz) with no tuning or adjustment.
  [ Hits: 145 | Votes: 1 | Rating: 4 ]

• MSL - Mechanical Systems Lehmann - Telescopic Masts and Towers - Specialist for vertically adjustable supporting frameworks including telescopic masts and telescopic towers for ham radio systems, lighting systems, measurement techniques, observation systems. Located in Gnaschwitz Germany
  [ Hits: 202 | Votes: 0 | Rating: 0 ]

• PSK: How to Assure a Clean Signal - Due to the nature of PSK it is imperative that you maintain a very clean signal. In this page you will find examples of a clean PSK signal and one with excessive splatter, and a short guide on how to properly adjust your transmitter to assure a clean trace
  [ Hits: 137 | Votes: 0 | Rating: 0 ]

• The FT-817 Calibration Menu - One of the interesting features of the FT-817 is that many of the conventional calibration settings that would have, in the past, been done using manual adjustments of coils, capacitors, and potentiometers, are done via software.
  [ Hits: 128 | Votes: 0 | Rating: 0 ]

• Online Morse Code Training - Learn Morse Online in 40 lessons with this web based morse code learning program, based on the Koch method. Choose the lesson, adjust the wanted parameters, and start the transmission of a set of random characters based on chosen lesson. Recognize the code and verify it at the end of the lesson.
  [ Hits: 366 | Votes: 2 | Rating: 10 ]

• JTSync - JTSync is a simple utility that provides the ability to synchronize your computer clock over a network with world-wide NTP servers. When the Internet connection is not available, JTSync allows you to make time adjustments based on decoded QSOs within the WSJT-X application.
  [ Hits: 2606 | Votes: 5 | Rating: 7.8 ]
• Icom ST-4003 Time Sync software - Adjust date and time of your Icom transceiver from a Windows PC. Compatible with IC-705, IC-7100, IC-7300, IC-7610, IC-7600, IC-7851 (7850), and, IC-9700
  [ Hits: 132 | Votes: 0 | Rating: 0 ]

• Teaching Arduino to Copy Morse Code - Teach Arduino to copy Morse Code. This project will produce a sketch that can actually copy the code that you send with your key, and additionally it will automatically adjust itself to your sending speed.
  [ Hits: 86 | Votes: 0 | Rating: 0 ]

• How to Make an Automatic 12V Battery Charger - A home made battery charger 110-220 v AC providing from 1.25-24 v DC Adjustable at 8 Amps output power, with Short Circuit Protection Over Load and over charge Protection.
  [ Hits: 154 | Votes: 0 | Rating: 0 ]

• 40 Segment LED S-Meter - Provide your radio with a very string signal, then adjust the HIGH LEVEL pot to the threshold of illuminating the last LED (all LEDs on).
  [ Hits: 94 | Votes: 0 | Rating: 0 ]

• Setup Packetradio on a Raspberry - A quik guide to install direwolf, bpq and jnos on a Raspberry Pi. if you follow the instructions in the examples you should get it to work. You only need to adjust the configuration files direwolf.conf, bpq32.cfg, autoexec.nos
  [ Hits: 117 | Votes: 1 | Rating: 10 ]

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