40 meter

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40 meter

417 links - and 8 categories

Antennas : 40M : 40 meter Delta Loop Antennas
  • Building a 40m Delta Loop Antenna - An experimento of a 40 meter delta loop antenna both in horizontal and vertical polarization and several elevation angles with interesting notes about the effect of the radial field under the antenna.
    [ Hits: 290 | Votes: 4 | Rating: 8.25 ]
Antennas : 40M : 40 meter Dipole Antennas
  • Half-Length Dipoles for 40 Meters - Complete collection of the four main parts of this excellet research on modelling and designing half wave dipole antennas for 40 meters band, covering all aspects beginning from full wave length antennas, to shortened, loaded and reshaped dipoles
    [ Hits: 377 | Votes: 2 | Rating: 10 ]
  • 40-80 Coax Trap Dipole - Full article on how to build a home-made wire dipole antenna for 40 and 80 meters band. Article is fully in italian, as it was published on ARI RadioRivista, but is plenty of self explaining pictures that will guide you on homebrewing this trapped dipole antenna for the lower amateur radio bands.
    [ Hits: 261 | Votes: 3 | Rating: 9.33 ]
Antennas : Dipole
  • 20 / 40 Meter Short Coil Loaded Dipole Antenna - Experimenting a 20 40 meter short coil loaded dipole antenna with the goal to keep the total length under 40 feet so that the dipole can be mounted on two 20 foot fiberglass pole to make a 20/40 meter rotatable dipole.
    [ Hits: 345 | Votes: 3 | Rating: 8.67 ]
Antennas : End-Fed
  • The Pop-Up Vertical 2.0 - Basically, this antenna is a 23-foot wire fed through a 4:1 un-un transformer. This antenna can be easily used in portable operation, for operating all bands from 40-10 meters.
    [ Hits: 253 | Votes: 0 | Rating: 0 ]
Antennas : Indoor
  • Ferrite Rod TX Antenna for 40m - No exotic claims are made for this antenna. Author just tried a few WSPR experiments on 40 meters and was surprised with the results. What appears below may inspire you to try something equally off-the-wall, to see what happens.
    [ Hits: 298 | Votes: 1 | Rating: 1 ]
Antennas : Loop
  • Moebius style 80/40 m band antenna - A loop antenna for 80 and 40 meters band, the main loop is based by a crossed line using aluminium strip lines. The main loop diameter is 150 cm.
    [ Hits: 315 | Votes: 1 | Rating: 1 ]
Antennas : Multiband
  • Short Antenna for 40-30-20 Meters Band - This page describes an entirely simple, One-Knob matchbox that will match this antenna efficiently on 40, 30 and 20m, using a simple circuit that can be switched between series-resonant and parallel-resonant with just one banana jumper
    [ Hits: 235 | Votes: 1 | Rating: 7 ]
Antennas : OCF
  • 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: 194 | Votes: 3 | Rating: 6.67 ]
Antennas : Stealth
  • A simple Attic Antenna for HF bands - This simple antenna was installed on the attic. Antenna was matched with help an Automatic ATU in 40, 30, 20, 17, 15, 12 and 10 meter amateur Bands. The Antenna worked satisfactory on the above mentioned bands.
    [ Hits: 311 | Votes: 7 | Rating: 6 ]
Antennas : VHF UHF
  • A cheap VHF UHF Yagi - Elements are aluminum TIG soldering rods 4.0mm of diameter, almost 1m long, these objects are light, thin and flexible based on the RZ9CJ Design
    [ Hits: 270 | Votes: 3 | Rating: 9.67 ]
Antennas : W3DZZ
  • W3DZZ Multiband Antenna - An easy to build and extremely high performance antenna, works perfectly on all HF bands 3.5-28 MHz with some compromises, it is basically an half wave dipole for 40-80 meters, an LC circuit or trap 40 meters allows you to use a single radiating element.
    [ Hits: 463 | Votes: 3 | Rating: 7.67 ]
DX Resources : Contest
  • AGCW-DL QRP Contest - The AGCW-DL invites all radio amateurs to participate in the annual QRP CONTEST. Annually on the second Saturday in March from 1400 to 2000 UTC. 80-10 meters bands except WARC
    [ Hits: 42 | Votes: 0 | Rating: 0 ]
DX Resources : Contest : Contest Rules
  • OK1WC Memorial MWC Contest - A CW contest running every Monday, from 1630 UTC to 1729 UTC on 40 and 80 meters band
    [ Hits: 107 | Votes: 2 | Rating: 10 ]
Internet and Radio : WebSDR
  • PY2GN SDR Brazil - WebSDR Pardinho SP Brazil providing access to HF bands 160 80 40 20 15 11 meters bands.
    [ Hits: 132 | Votes: 2 | Rating: 7.5 ]
  • WebSDR from Croatia - WebSDR receiver located near Krizevci, Croatia with 0-2 MHz, 60-80 meters band and 40-49 meters band
    [ Hits: 171 | Votes: 2 | Rating: 8.5 ]
Radio Equipment : HF Transceivers
  • SW-3B QRP CW RTX - The SW-3B is a Three-band CW QRP transceiver, Weight 180g, output power 5W at 12v, 2W at 9v, works on 40 30 and 20 meters band
    [ Hits: 119 | Votes: 0 | Rating: 0 ]
Radio Equipment : HF YAGI Antennas
  • SteppIR UrbanBeam Review - A review of the SteppIR UrbanBeam antenna a two element Yagi antenna working 40-6 meters. The UrbanBeam is a good choice for those thare are limited by lot size, regulations, city regulations.
    [ Hits: 191 | Votes: 1 | Rating: 1 ]
Technical Reference : Homebrew
  • 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: 92 | Votes: 0 | Rating: 0 ]
Technical Reference : Test Equipment : Oscilloscope
  • OsclilloSpectrum - Spectrum and oscillo with tuner TV 40 MHz to 860 MHzh ome made project. This projects foreseen a multi function device providing a spectrum analyzer, scope and a voltmeter.
    [ Hits: 117 | Votes: 1 | Rating: 7 ]

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