lf radio

lf radio

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• A 30 Meter Sloping Dipole Antenna - This variation of the basic horizontal, half wavelength flat top dipole has proven to be a simple, effective antenna suitable for both home and portable use.
  [ Hits: 456 | Votes: 0 | Rating: 0 ]

• The half-wave dipole, your first antenna - Construction tips of a basic wire antenna, the half wave dipole. Inverted V dipoles and effects of inverted v on radiation pattern.
  [ Hits: 235 | Votes: 1 | Rating: 9 ]

• Multi-band End-Fed Antenna - An excellent guide to homebrewing multi band end-fed antennas. The article, embed several drawings including diagrams and detailed pictures, illustrating the basic funcionality of end-fed antennas. The author gives some basic hints on how to build a half size antenna for 80 40 to 10 meters and a 6 meter to 40 meter configuration. It is also well described how to build the impedance transformer and the loading coils for lower bands.
  [ Hits: 1105 | Votes: 6 | Rating: 4.5 ]

• EFHW autotransformer comparison - Two different ways to create autotransformer for end fed half wave wire antennas, by using ferrite or air core.
  [ Hits: 525 | Votes: 3 | Rating: 2 ]
• End Fed Half-Wave Antennas - An interesting article on end fed half-wave wire antennas with a couple of original experiments. Author illustrate the role of the QRP matchbox, and a 40/20 meter antenna with a center stub making it a large bandwidth antenna for 40 and 20. Includes also an 80/40 end fed with the typical coil to make it available on 80 merts band.
  [ Hits: 288 | Votes: 2 | Rating: 10 ]

• Half Wave Fan Dipole Antenna - Amateur Radio 40m 20m 15m Half Wave Fan dipole antenna project with part list, pictures and drawing. Includes the option to expand the antenna to cover the 80 meters band
  [ Hits: 680 | Votes: 1 | Rating: 1 ]

• The Yagi Antenna - Presentation - A presentation of the Yagi Antennas, and other interesting tid-bits by Brian Mileshosky. This document explains basic concepts of Yagi-Uda antenna theory, influence of reflector and directors on global antenna gain and directivity of radio waves. A simple tape measure antenna project is also included.
  [ Hits: 541 | Votes: 2 | Rating: 7 ]

• Home Brew Fold Over Tower - A Tower Project at WOIVJ. A pictorial story of the erection of a 40 foot, self-supporting, fold-over tower.
  [ Hits: 368 | Votes: 0 | Rating: 0 ]

• DIY Dual Band 144-440 MHz vertical antenna - A homemade VHF/UHF vertical antenna made essentially with RG58 coax cable, with a 9 turns choke balun to prevent the shield acting as a RF Radiator.
  [ Hits: 1376 | Votes: 14 | Rating: 5.5 ]

• NCDXF Beacons Transmission Schedule - Whatch at beacons transmitting in real time. This page contains a self refreshing table that displays every 10 seconds the current transmission schedule of the international beacon project. Tune your radio and check the beacon you are hearing.
  [ Hits: 323 | Votes: 0 | Rating: 0 ]

• Tuolumne County Amateur Radio Electronics Society Ham Radio Club - TCARES - The TCARES membership provides communications assistance with fires, floods, search & rescue, and health & welfare message assistance to the Red Cross, without pay, using their own equipment, usually in twelve hour shifts.
  [ Hits: 167 | Votes: 0 | Rating: 0 ]

• PD9Z Sascha - Hello, I'm glad that you stopped by. In this site you will find some information about myself and much more interresting Ham Radio stuff.
  [ Hits: 149 | Votes: 1 | Rating: 9 ]

• R3KBO EB104.ru Amateur Radio Products - R3KBO is an amateur radio club producing and developing amateur radio kits and assembled products including HF VHF Power Amplifiers or RF Power Kits and amplifier parts, low pass filfers, band pass filters, sourge protections, splitters and combiners, antenna switches
  [ Hits: 513 | Votes: 1 | Rating: 10 ]

• XieGu Tech - XieGu Tech manufactures quality amateur radio transceivers and amplifiers designed by BG8HT. Xiegu focus is portable and self contained transceivers perfect for your next SOTA, hiking trip or travel experience.
  [ Hits: 346 | Votes: 0 | Rating: 0 ]

• DX-ers guide to instantaneous fame - This web page is part of a self-help program for licensed amateur radio operators and radio pirates.
  [ Hits: 165 | Votes: 0 | Rating: 0 ]

• Northern California Transmitter Hunters - The Northern Calfornia Transmitter Hunters are a group of people that share a common interest in amateur radio transmitter hunting.
  [ Hits: 191 | Votes: 0 | Rating: 0 ]

• WSQCall A Weak Signal QSO mode for LF/MF - Amateur Radio enthusiasts who are interested in the LF and MF bands may be familiar with WSPR and WSJT JT9. Used as a propagation probe or beacon, WSPR allows very weak signals to be detected, frequently as weak as -27dB SNR.
  [ Hits: 186 | Votes: 0 | Rating: 0 ]

• A simple QRP Power Meter Project - A really simple project to make a power meter measuring RF output powers from a few mW up to half a watt. A DIY amateur radio project for QRP enthusiasts
  [ Hits: 463 | Votes: 0 | Rating: 0 ]

• Setting up Raspberry Pi for Ham Radio - An interesting guide to installing software on a Raspberry for amateur radio use. This documentation cover the Raspberry Pi 4 version that whose hadware is powerfull enought to fullfill all requiriements for ham radio programs.
  [ Hits: 397 | Votes: 3 | Rating: 9.33 ]

• A Transceiver Front-End Protector - A transceiver front-end protector in high signal level environments. An homemade RF limiter to protect your receiver front-end from high radio frequency.
  [ Hits: 660 | Votes: 0 | Rating: 0 ]

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