practic test

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practic test

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Antennas : 160M

  • 160M antenna for small lots or gardens - Small & practical DIY inverted U antenna. This design worked very well during the 2017 CQWW 160M SSB contest.
    [ Hits: 1697 | Votes: 5 | Rating: 4.2 ]
Antennas : End-Fed
  • Testing End Fed Long Wire Antenna - Testing a 27.2 metre end fed long wire antenna,used for SOTA activations placed as an inverted V. The author reports in this article an on the field practical result.
    [ Hits: 165 | Votes: 0 | Rating: 0 ]
  • Delta Loop vs End Fed Half Wave on 20m - Intrigued by a German OM positive experience with a 20m delta loop, the author replicated the design, noting its favorable 50-ohm impedance compared to their 40m version. Testing against a vertical EFHW, the delta loop excelled within EU but lagged at longer distances. Despite needing more testing, the user leaned towards the EFHW for its overall performance and practicality.
    [ Hits: 123 | Votes: 0 | Rating: 0 ]
Antennas : End-Fed : End Fed Half Wave Antenna
  • Comparing Mobile whip versus EF HW Vertical - PH0NO conducted field tests comparing a mobile antenna (DX-UHV) to an end-fed half-wave wire. Results on 20m showed the end-fed wire outperforming the mobile antenna, with a significant difference in signal strength. On 40m, the end-fed wire surpassed the mobile antenna in spots and reach. While the mobile antenna is more practical, the end-fed wire offers superior performance. Further testing is planned.
    [ Hits: 81 | Votes: 0 | Rating: 0 ]
Antennas : Horn
  • A Horn Antenna for 2.4 GHz. - This Antenna is not really practical for AO-40 reception, but horn antennas have a number of qualities useful in microwave antenna testing and noise figure measurements.
    [ Hits: 10958 | Votes: 32 | Rating: 3.82 ]
Antennas : WiFi
  • Practical Wifi Antenna Measurement - This page describes a simple way to determine the main RF characteristics of a Wifi (IEEE802.11b/g wireless LAN) antenna.
    [ Hits: 2956 | Votes: 3 | Rating: 4 ]
DX Resources : Contest : Resources Operating Modes : QRP
  • Antennas for QRP Operation - Antennas for low-power operation resemble those for 100W use. Minor adjustments, like capacitor voltage ratings, may apply, but basic principles persist. Portable antennas, notably Backpack Antennas for weight-conscious setups, hold relevance beyond QRP. While some antennas function acceptably at higher power, efficiency issues arise at QRP levels. Testing antennas at 100W exposes weaknesses, particularly in tuners, crucial for efficient QRP operation.
    [ Hits: 58 | Votes: 0 | Rating: 0 ]
Software : Ham Exam
  • RadioTelephone Tutor - Helps you study for the Ham Radio & FCC GROL exams. Often times, test questions are worded in ways; that fool you. RadioTelephone Tutor drills on missed questions, till you know the answers backwards and forwards. Can take entire question pools in straight, or random order. Creates a practice test; which represents what you would be given in a real exam.
    [ Hits: 444 | Votes: 0 | Rating: 0 ]
  • HamStudy.org - Study for your ham radio license with hamstudy.org, a free suite of study tools with user contributed explanations for the questions. Learning flashcards and smart practice tests ensure that you see and learn the full pool while statistics enable you to track your progress.
    [ Hits: 1979 | Votes: 23 | Rating: 9.39 ]
Technical Reference : Filters
  • Receiver Band-Pass Filters - Third-order Cauer filters can boost performance of multi-transmitter, multi-operator contest stations to the next level. The filters are practical and you don’t need expensive test equipment to align them.
    [ Hits: 885 | Votes: 1 | Rating: 5 ]
Technical Reference : Morse Code Oscillator
  • Morse Code Practice Oscillator - In this project, we blend old school and new school tech to create a Morse code oscillator that you can use to practice keying Morse code. We start by milling out a double-sided board on the Bantam Tools Desktop PCB Milling Machine, then we solder on a series of components, and finally test our skills of yesteryear communication
    [ Hits: 61 | Votes: 0 | Rating: 0 ]

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