class c

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class c

164 links - and 2 categories

Antennas : 6M
  • End-fed 6-meter Zepp - A half-wave antenna can be end-fed or center-fed. An end-fed half-wave antenna may offer mechanical and construction advantages over a center-fed antenna. The radiation pattern for an end-fed half-wave antenna is no different than a center-fed half-wave antenna.
    [ Hits: 174 | Votes: 2 | Rating: 9 ]
Antennas : Homebrewing Techniques
  • Wire Antenna Design Lengths - The Classic Numbers for All Types of Wire Antennas at HF. Wire antennas need to be made a bit long and cut to resonance. They are affected by height above the ground and surrounding objects. In order to get an idea of the right place to start, certain formulas are generally accepted.
    [ Hits: 327 | Votes: 1 | Rating: 7 ]
Antennas : Indoor
  • Testing Dipole vs Indoor Magnetic Loop Antenna - Testing performances of indoor antenna. A comparison of a magnetic loop antenna vs a classic wire dipole done using wsprlite on 30 meters band.
    [ Hits: 855 | Votes: 2 | Rating: 5.5 ]
Antennas : Multiband
  • Multiband trap dipole - This antenna is a classical antenna working on 7,10,14,18,50 MHz is implemented with three traps for 30, 17 and 6 meters
    [ Hits: 269 | Votes: 0 | Rating: 0 ]
Antennas : Slim Jim
  • 2m Slim-Jim Aerial using Ladder-Line - The Slim-Jim is a bit of a classic - building one is almost certainly a rite of passage and you will be glad that you did: It is easy to make, fairly easy to tune and rolls-up for transportation.
    [ Hits: 184 | Votes: 2 | Rating: 10 ]
Antennas : Theory
  • The Classic Beverage Antenna Revisited - This is a QST Article published in January 1982 by W1FB D. Demaw and HH Beverage and is a complete review of the original article published in 1922, which updates and reivew the beverage antenna theory and developlment, explaining the antenna design of transformers and gives accurate reports on antenna general performance.
    [ Hits: 558 | Votes: 1 | Rating: 6 ]
  • Ground Systems as a Factor in Antenna Efficiency - A classic document originally presented in Proceedings of the Institute of Radio Engineers in 1937 and is, still today, the standard referenced by the FCC, text books and many amateur radio publications.
    [ Hits: 394 | Votes: 1 | Rating: 1 ]
Antennas : Vertical
  • Revisiting the Rybakov 806 Vertical Antenna - An article about the Rybakov 806 Vertical antenna. The classic Rybakov configuration is a 7.6m or 8m ( aprox 25 or 26 feet) wire fed through a 4:1 UNUN
    [ Hits: 450 | Votes: 4 | Rating: 5.75 ]
Ham Radio : Clubs : Europe : France
  • F8KFP Radio Club Urtois - Le radio club de la Cote Basque, amateur radio pages about HF / VHF / UHF / digital modes, Projets with arduino and raspberry , training classes.
    [ Hits: 299 | Votes: 0 | Rating: 0 ]
Internet and Radio : Classifieds
  • HamFM Classifieds - 100% free eBay like classified listings for any ham radio operator. Search filters for distance and item category.
    [ Hits: 179 | Votes: 0 | Rating: 0 ]
  • DXMaps Ham Radio Clip Art - HAM radio related clipart gallery, is a large collection of amateur radio gifs and jpeg images classified in several categories
    [ Hits: 143 | Votes: 2 | Rating: 9 ]
Manufacturers : Software Defined Radio
  • (tr)uSDX - The (tr)uSDX is a 5-Band / Mulitmode QRP Transceiver in Pocket Format (90x60x30mm - 140g). It features a highly efficient Class E PA and Supports CW/LSB/USB and AM/FM. Right now it covers 80/60/40/30/20m and in Future there will be support for 17/15/12/10m
    [ Hits: 200 | Votes: 2 | Rating: 10 ]
Operating Modes : Morse code : Learning Morse Code
  • Morse code practice - A comprehensive morse code auduio guide with several youtube movies classified by skill level, characters and numbers, sentences, speed level and more. All movies are linked by an interactive interface that let you select the speed and the excercise type. The page contains an downloadable set of morse code exercises and several other resources
    [ Hits: 134 | Votes: 0 | Rating: 0 ]
Operating Modes : Morse code : Morse Key Collections
  • Manipulateurs Morse Anciens - A large collection of morse keys classified by country with samples from all over the world
    [ Hits: 120 | Votes: 1 | Rating: 2 ]
Radio Equipment : HF Transceivers : ICOM IC-756
  • Icom IC-756PROIII - Icom UK Discontinued products - A page dedicated tho the IC-756PROIII transceiver. This radio, discontinued, incorporates many of the features that made its predecessors so successful. However, the integration of the latest technology employed in the IC-7800 such as receiver technology, +30dBm class IP3, miniscope makes this new rig the very pinnacle of the IC-756PRO series.
    [ Hits: 161 | Votes: 1 | Rating: 9 ]
  • Display Transplant into an Icom IC-756 - This article is about replacing the LCD display in a Icom IC-756 classic. The displays in these radios have not been supported by Icom in several years.
    [ Hits: 235 | Votes: 1 | Rating: 10 ]
Radio Equipment : Reviews and Comparisons
  • Ham and CB Radio - Web site dedicated to articles relating to Ham and CB Radios and antennas, reviews and classifieds.
    [ Hits: 168 | Votes: 3 | Rating: 10 ]
Software : Software Defined Radio
  • CATSync - The CAT Tool for WebSDRs. Allows to control public WebSDR receivers with a real rig connected via CAT control to your computer. It supports the classical WebSDR as well as Kiwi SDR interfaces Tune the VFO of your radio and see the web SDR follow in realtime
    [ Hits: 353 | Votes: 4 | Rating: 7.75 ]
Technical Reference : Amplifiers : HF Amplifiers
  • Stone Creek Special 600 HF RF Amplifier - This is a Solid State Amplifier Project. It uses 4 MRF150 MosFet Power Transistors. The Power Supply Voltage is 50 VDC at 21.5 Amp. The max power available is 1,075 Watts. The Efficiency is about 65% +/- and runs Class AB Solid State.
    [ Hits: 270 | Votes: 0 | Rating: 0 ]
Technical Reference : Arduino

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