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837 links - and 13 categories

Antennas : 10M
  • IK1ZYW Vertical antenna - A vertical antenna for stationary-mobile HF-VHF operation. It works on 2-6-10 and 12 meters band.
    [ Hits: 14164 | Votes: 8 | Rating: 4.62 ]
Antennas : 160M Antennas : 20M
  • Cedevita-20 Antenna - The Cedevita-20 is a hybrid monoband antenna, the result of merging the radiator of a shortened vertical with one element of a dipole. It fits on most balconies and must be hung from the ceiling. By ik1zyw Paolo Cravero
    [ Hits: 5074 | Votes: 3 | Rating: 5.33 ]
Antennas : 20M : 20 meter Vertical Antennas
  • 20m T-Monopole - 20m T-Monopole short vertical antenna for 20 meters by AA5TB
    [ Hits: 10666 | Votes: 4 | Rating: 8.75 ]
Antennas : 40M : 40 meter Dipole Antennas Antennas : 80M
  • 80M Vertical antenna with capacitance hat  pop - Simple wire antenna cheap to make, using readily available materials, Low angle radiation, with rejection of high angle signals Wide bandwidth, with resonance at the 80M DX window (3.790-3.800 MHz); and Maximum height is 40 feet
    [ Hits: 23374 | Votes: 23 | Rating: 7.05 ]
Antennas : Helical
  • A two dollar helical hf portable antenna  pop - Here is an easily transportable vertical antenna for 20 meters collapsible to 4 feet that costs about $2.00 to make. This was created as a fun project to demonstrate how to enjoy operating HF in the field with a home-made portable antenna without spending a ton of money. Bev AH6NF (YL) made this antenna, tuned and ready to operate in less than one hour
    [ Hits: 20123 | Votes: 12 | Rating: 7.50 ]
Antennas : Portable Antennas : Theory
  • Antenna Polarization notes - Antenna polarization is a very important consideration when choosing and installing an antenna. Most communications systems use either vertical, horizontal or circular polarization. Knowing the difference between polarizations and how to maximize their benefit is very important to the antenna user.
    [ Hits: 2234 | Votes: 4 | Rating: 3.50 ]
Antennas : Vertical
  • Add 60 meters to butternut vertical antenna - The Butternut vertical is a great antenna in that it covers all HF bands from 160- though 10-meters (or 160-30 meters for the HF-2V) except 60-meters. This article describes three methods to add 60 meters to your Butternut vertical without losing any other bands.
    [ Hits: 2843 | Votes: 3 | Rating: 1.67 ]
  • IK-STIC 2 vertical multiband antenna - The IK-STIC 2 is a vertical, all band, antenna that is over 25 feet tall yet weighs under 5 pounds. Based on a telescopic pipe or a fiberglass fishing pole, using a tuner it can easily cover the amateur radio HF bands from 40 - 10 Meters
    [ Hits: 4587 | Votes: 6 | Rating: 5.17 ]
Contesting : Software
  • Contest LogChecker - Contest LogChecker is a set of contest tools for Microsoft Windows, combining advanced text editing with keyword highlighted, and the ease and flexibility of import, export, statistics and charting utilities. With LogChecker you can edit, fill in the log, check Cabrillo Format and Header, convert files from the most popular logging software to Cabrillo, print customizable files, calculate statistics and export logs to RTF, PDF or HTML for publishing. You can examine a log in many different ways by highly interactive methods. LogChecker includes a Master Callsign Database tool for managing databases, which have been generated from actual contest logs. Commercial
    [ Hits: 2111 | Votes: 23 | Rating: 9.07 ]
Internet and Radio : Video
  • Convert PC Power Supplies for use by Ham Radio - PC power supply conversion for ham radio use. Slide show overview showing how convert PC Power supplies to ham radio use presented at the August 2007 FSARC meeting.
    [ Hits: 3305 | Votes: 5 | Rating: 8.20 ]
Manufacturers : Antennas : HF : Vertical Antennas
  • KVK Antenna Systems - The manufacturer of the NuBeam, Vipole, and the multi-band Quad-Folded-Dipole (or QFD for short) antenna. Also have a unique multiband vertical which can combine operation on multiple HF frequencies as well as provide high gain on 50, 144 and 438MHz in a single antenna.
    [ Hits: 3597 | Votes: 1 | Rating: 1.00 ]
Manufacturers : Microwave
  • CAP Wireless Amplifiers - Design and manufacture application specific microwave and RF amplifiers, upconverters, downconverters and multifunction assemblies.
    [ Hits: 626 | Votes: 4 | Rating: 7.00 ]
Operating Modes : Packet Radio
  • WA4DSY 56KB RF Modem - This is a prototype of the WA4DSY 56KB RF modem. It is intended for use on amateur packet radio networks. The modem generates RF in the 28 to 30 mhz range and requires and linear transverter to convert the signal to a UHF or microwave ham band
    [ Hits: 895 | Votes: 0 | Rating: 0.00 ]
Software : Morse Code Decoders
  • MorseGen v1.2 - MorseGen converts text into a WAVE file of Morse code. The Tone and Speed are adjustable and the WAVE file can be repeated at a pre-set interval allowing it to be used as a CW Ident for amateur radio applications which require it.
    [ Hits: 2193 | Votes: 6 | Rating: 7.00 ]
Technical Reference : Radio Frequency Interference : Noise Reduction
  • QRM and noise reduction Priority listing - You will find on these pages my experiences and results on antennas and local/non-local QRM/noise reduction. Using a broadband vertical active magnetic loop and a home made / designed broadband amplifier. Two vertical magnetic Alford loops are used in an array. Analog and Digital Signal Processing and a dual phase coherent Software Defined Radio (SDR) are used. By PA0SIM
    [ Hits: 4609 | Votes: 6 | Rating: 7.00 ]
Technical Reference : Software Defined Radio
  • Wavefront CompactPCI (CPCI) RF converter - The Wavefront CompactPCI (CPCI) RF converter provides a complete half-duplex radio front-end in an industry-standard 6U format. The architecture consists of dedicated receive and transmit channels that share a common RF interface.
    [ Hits: 756 | Votes: 0 | Rating: 0.00 ]
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