high q

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high q

277 links

Antennas : 70cm
  • 432 MHz 5 elements Yagi - 5 Element Yagi with Conventional Driver, this little Yagi has a high F/B, which makes it quite useful as a contest stack.
    [ Hits: 725 | Votes: 2 | Rating: 10 ]
  • 432 MHz yagi antenna - A 70 cm yagi designed for EME + SSB narrow bandwidth version, strictly G/T breeding. This little Yagi has a high F/B, which makes it quite useful as a contest stack
    [ Hits: 676 | Votes: 2 | Rating: 10 ]
Antennas : 80M
  • Frame Antenna for 80m - A frame antenna for the 80 meters band, built to be folded and to be easy to be mounted and dismounted. This antenna is suitable for indoor and QRP use, bandwidth is just 10kHz and should be observed a proper distance while transmitting due to high voltage.
    [ Hits: 726 | Votes: 5 | Rating: 8.8 ]
Antennas : Magnetic Loop
  • The Balcony Mounted Magnetic Loop Antenna - A NEC Model Comparative Analysis of Physical Orientation and Performance. The small magnetic loop is a useful compromise antenna for limited space and portability. For this reason, the magnetic loop antenna is a practical high frequency antenna solution for the restricted space of apartment dwellers
    [ Hits: 815 | Votes: 3 | Rating: 9.67 ]
  • The Midnight Loop  updated - An Experimental, High-efficiency, Graphic-Tunable Magnetic Loop antenna and loop controller in a 52 pages PDF presentation with drawings and pictures
    [ Hits: 1174 | Votes: 2 | Rating: 8.5 ]
  • Magnetic Loop antenna for VHF - A magnetic loop antenna for the VHF band, featuring a high gain that can be compared to a quarter wave vertical antenna
    [ Hits: 731 | Votes: 9 | Rating: 5.99 ]
Ham Radio : Clubs : Technical Specialty : Digital Modes Clubs
  • Amateur Radio Emergency Data Network - AREDN provides the Amateur Radio Community with a quality solution for supporting the needs of high speed data in the Amateur Radio and Emergency Communications field.
    [ Hits: 274 | Votes: 1 | Rating: 10 ]
Manufacturers : Power Supply
  • Alpha Power Systems LLC - Alpha Power Systems, LLC is committed to offering the highest quality of surge protection and power quality products, such us Backup UPS available with service second to none
    [ Hits: 130 | Votes: 0 | Rating: 0 ]
Manufacturers : Test Equipment
  • SWR ANTENNA ANALYZER + WSPR TX - Available worldwide can be used as Arduino Shield or plug it in to you PC , or with a bluetooth adapter connect to Android. With a highly optimized software, KAI200 brings you: a. Antenna analyzer form 1 up to 200 Mhz; b. WSPR transmiter (set up by serial terminal); c. Square Wave Signal generator KAI200 is all you need for your radio whatever it is Yaesu, Icom, Kenwood or Drake and DIY projects.
    [ Hits: 321 | Votes: 8 | Rating: 9.62 ]
Operating Aids : Maps
  • World Map - Free windows world map application display current time, sunrise and sunset, greyline map, dx stations, requires windows 7 or higher. The program includes three resized Natural Earth maps which have been resized to 4k or slightly less. By Simon Brown G4ELI better known as the inventor of Ham Radio Deluxe.
    [ Hits: 1043 | Votes: 0 | Rating: 0 ]
Radio Equipment : HF Transceivers : Yaesu FT-1000MP
  • Yaesu Mark V FT 1000 MP - A page dedicated to Yaesu Mark V/FT-1000MP transceiver squarely aimed at the high performance contest and DX crowd.
    [ Hits: 350 | Votes: 0 | Rating: 0 ]
Shopping and Services : QSL Printing
  • CustomQSL.com - Custom Designed Photo QSL Cards, Full Color stunning designs, High Quality Printing at competitive Prices. US based QSL designer and printer specialized in custom-designed ham QSL cards.
    [ Hits: 340 | Votes: 0 | Rating: 0 ]
Technical Reference : Amplifiers : RF Amplifiers Theory
  • How to Design an RF Power Amplifier - This video will provide a foundation for understanding how power amplifier circuits work. If you are new to High Frequency Power Amplifier Circuit Design, this is the place to start.
    [ Hits: 673 | Votes: 1 | Rating: 10 ]
Technical Reference : Antenna Rotator
  • Autonomous Satellite Tracker - This two-axis tracker tracks satellites with high accuracy entirely by reference to built-in spatial sensors in conjunction with a 9-DOF (degrees of freedom) sensor attached to the antenna boom and a GPS receiver.
    [ Hits: 1712 | Votes: 6 | Rating: 8.5 ]
Technical Reference : Power Supply
  • How to convert Server Power Supplies - The practice of converting computer server power supplies to make a very high quality high power supply at low cost is attractive. It doesn't normally require any modification to the supply but the hard part is figuring out how to trick them into turning on.
    [ Hits: 818 | Votes: 0 | Rating: 0 ]
Technical Reference : RF Design
  • Introduction to RF & Wireless Communications Systems - This tutorial covers an introduction to RF, wireless, and high-frequency signals and systems, includes explaination of what is RF, why operate at Higher Frequencies, Frequency Shifting through Frequency Mixing.
    [ Hits: 281 | Votes: 1 | Rating: 6 ]
Technical Reference : Receiver Front-End Protector
  • 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: 656 | Votes: 0 | Rating: 0 ]
  • KD9SV Front End Saver - Homemade RF limiter project, to protect the K3 receiver front-end for high radiofrequency based on the original KD9SV project.
    [ Hits: 325 | Votes: 0 | Rating: 0 ]
Technical Reference : Repeater
  • Cross Band Repeaters - Crossband Repeating is a process where a Ham transmits one signal on one band (typically UHF), and it is received by another radio with a better antenna/power installation, and re-transmitted (typically on VHF) to another radio system, or a repeater. Everyday examples of cross-band repeaters are repeater receive sites that hear the input signals on 2m and retransmit those signals on a frequency higher than 220 MHz.
    [ Hits: 206 | Votes: 0 | Rating: 0 ]
Technical Reference : SWR Meters

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