a simple

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a simple

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Antennas : 2M
  • 9 element yagi for 2 meters band  pop - A simple design of a 9 elem. yagi antenna for 2 meters band
    [ Hits: 53419 | Votes: 263 | Rating: 5.23 ]
  • 7 Elements YAGI for 144 Mhz  pop - The QM7 antenna is a simple 7 elements Yagi with 3.7 m boom length for the lower 144 MHz SSB/MGM band, in PDF Format
    [ Hits: 42734 | Votes: 49 | Rating: 5.87 ]
  • QM5 Yagi for 2 meters band - The QM5 antenna is a simple 5 elements Yagi with 1.88 m boom length for the lower 144 MHz SSB/MGM band, I used it mainly for Sporadic-E and MS contacts. It exhibits a forward gain of 9.17 dBd; i.e. 11.3 dB forward gain over the isotropic radiator, while the F/R is about 11.5 dB. Elements
    [ Hits: 6869 | Votes: 4 | Rating: 5.25 ]
  • QM7 7 elements 144 MHz Yagi-Uda Antenna - The QM7 antenna is a simple 7 elements Yagi with 3.70 m boom length for the lower 144 MHz SSB/MGM band, used it mainly for Sporadic-E and MS contacts. It exhibits a forward gain of 11.35 dBd; i.e. 13.5 dB forward gain over the isotropic radiator, while the F/R is about 12.5 dB
    [ Hits: 5361 | Votes: 15 | Rating: 5.27 ]
Antennas : 40M
  • A Feasible Full Sized 40 Meter Beam - This project started as a result of renewed interest in 40 meters coupled with the desire for an antenna system that would be more effective than the simple dipole.
    [ Hits: 7238 | Votes: 1 | Rating: 1 ]
Antennas : G5RV
  • G5RV Formula - G5RV Formula, a simple multiband antenna, by Rick, KC8AON
    [ Hits: 7215 | Votes: 12 | Rating: 5.34 ]
Antennas : Helical
  • Helical Antenna Calculator - This is my simple implementation of the ARRL Antenna Book design equations for the axial-mode helical antenna.
    [ Hits: 4640 | Votes: 47 | Rating: 5.55 ]
Antennas : J-Pole
  • HF J-Pole antenna - A Simple Nondirectional Antenna for Ten Meters QST February 1950, Easy to build J-Pole antenna for restricted space.
    [ Hits: 6614 | Votes: 3 | Rating: 3 ]
Antennas : Loop
  • Cheap antenna to make from 160m - 6m  pop - The antenna is nothing more than a simple 2.4 metre square loop drawing pinned to the internal brick wall of the spare bedroom. Yep, thats right, the inside wall of the spare bedroom - ideal for flat dwellers, hotel rooms or whinging neighbours, The loop has a simple switched inductance at the top of the square loop and uses a simple coaxial stub to tune the antenna. An additional variable capacitor placed across the feedpoint can be used to fine tune the resonance of the antenna, by Andy G0FTD
    [ Hits: 46499 | Votes: 28 | Rating: 7.61 ]
Antennas : Portable
  • A Portable Multi-Band Magnetic Loop Antenna  updated  pop - Described here is a simple multi-band magnetic loop antenna designed for 20, 30 and 40 metres, but by changing the overall length of the wire coverage of other bands is feasible
    [ Hits: 34653 | Votes: 12 | Rating: 6.33 ]
Antennas : Vertical
  • 9 band vertical HF antenna by RW3XA  pop - Simple vertical radiator with matching box. No traps, no tuner required for this multiband antenna
    [ Hits: 38740 | Votes: 43 | Rating: 7.34 ]
Antennas : Wire
  • How create simple dipoles - How to create a simple but effective half wave dipole, illustrated instrucions on how to build wire antennas
    [ Hits: 3339 | Votes: 4 | Rating: 6.5 ]
Operating Aids : Beginner's Guides
  • A Simple Telegraph Key - How To Build Code-Practice Apparatus: A Simple Telegraph Key
    [ Hits: 9779 | Votes: 12 | Rating: 5.75 ]
Radio Equipment : HF Transceivers : ICOM IC-756
  • PC to RTX interface - Schematics for IC-706, IC-718, IC-756PRO, TS-570, TS-870, and simple universal S.B. interface All three interfaces presented on this page employ galvanic isolation of the transceiver from PC computer. Audio paths are separated by transformers, optocouplers serve to separate the digital paths (PTT and RTTY keying).
    [ Hits: 3781 | Votes: 2 | Rating: 7.5 ]
Software : Hellschreiber
  • Spectrum Lab  pop - DL4YHF's Audio Spectrum Analyser Spectrum Lab or Speclab started as a simple FFT program running under DOS a long time ago, but it is now a specialized audio analyzer, filter, frequency converter, hum filter, data logger and more. Can be used for MTHELL QRSS, DFCW, PSK, MSK, Castle
    [ Hits: 47768 | Votes: 56 | Rating: 6.97 ]
Software : Legacy Systems : PalmOS
  • Smorse - Palm OS morse code software, simple morse code sender, sends code on the built-in speaker at 1-80 WPM. Higher speeds are sloppy because of the 10 msec resolution of the internal timer.
    [ Hits: 2135 | Votes: 1 | Rating: 1 ]
Software : Propagation
  • Meteor and Colorgramme - FREE specialized software in the detection and registration of echoes radio products by meteors shower, falling star, at the time of their gone in atmospheric. They are destined to all possessors of a radio and a computer, interested parties by this simple technique of radioastronomy.
    [ Hits: 1524 | Votes: 2 | Rating: 8.5 ]
Software : Satellite tracking
  • Satbuster - SATBUSTER for Windows is especially designed for satellite visual observers and trackers. Its users, mainly amateur astronomers and radio amateurs, appreciate both the accuracy and the simple to use graphical interface.The software is aimed to hobbysts. However a growing number of plain folks are starting to use this tool to recognize and look at the International Space Station and the Space Shuttle during its missions too
    [ Hits: 2397 | Votes: 3 | Rating: 4.67 ]
Technical Reference : Audio
  • Audio Preamp - Easy circuit that provide good gain to weak audio signals
    [ Hits: 3818 | Votes: 2 | Rating: 3.5 ]
Technical Reference : Morse Keys
  • Adjusting Morse Keys and Paddles - These instructions use simple, generally familiar examples of equipment types and are designed to help you find the adjustment that suits you best. If you are looking on how to adjust a morse key, bencher key, paddle or straight morse key, here you will find all instructions.
    [ Hits: 1678 | Votes: 0 | Rating: 0 ]

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