pa system

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pa system

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Antennas : 160M
  • 160M Folded Counterpoise - An FCP is not magic. It has no gain. An FCP improves an antenna system by replacing more loss with less loss. Some have been able to erect better wires in the air because the small size of the FCP allowed better placement of the antenna.
    [ Hits: 252 | Votes: 0 | Rating: 0 ]
Antennas : 40M : 40 meter Vertical Antennas
  • 40m Vertical End-Fed Antenna - A quarter wave vertical end-fed antenna for the 40 meters band. As all vertical antennas, also this aerial requires a good earthing system. In this project the ground is composed by twelve 4, wires buried in the lawn by using a spade to create a slit to drop the wire into.
    [ Hits: 2688 | Votes: 7 | Rating: 5.43 ]
  • A very efficient half size 40 meter Vertical Antenna - A vertical antenna project for the 7MHz made with some spare parts. Based on a broken 20 foot fishing pole, it is based on a good ground system made with radials and a capacitive hat done to increase the global radiation resistance of the antenna. A custom loading coil is also included in this project to perfectly tune the antenna to the CW portion of the 40 meters band.
    [ Hits: 735 | Votes: 4 | Rating: 8.5 ]
Antennas : Dipole
  • Folded dipole antennas: terminated vs un-terminated - As the name suggests, it is simply a dipole with the tips folded towards each other. In this case, a full-wave dipole. The span of a standard folded dipole is aprox 0,5 lambda. In this article the author investigate on differences between un-terminated vs terminated folded dipole antennas.
    [ Hits: 493 | Votes: 9 | Rating: 6.78 ]
Antennas : Towers
  • How setup the antenna tower - A multiple page article about assembling the antenna system, this section includes informations on constructing of the concrete tower base, starting from setting up correctly the foundations in relation to the antenna height.
    [ Hits: 220 | Votes: 1 | Rating: 8 ]
Ham Radio : Clubs : North America : USA : Utah
  • K7CSW - Saltlake Peaks Amateur Radio Club - SPARC The Saltlake Peaks Amateur Radio Club, founded by employees of L-3 Communications located in Salt Lake City, Utah at the Communications Systems West Division.
    [ Hits: 165 | Votes: 0 | Rating: 0 ]
Manufacturers : APRS
  • Argent Data Systems - Small company based in Santa Maria, California, designing and manufacturing electronic products for amateur radio, education, and commercial users. Product line includes APRS devices for real-time vehicle tracking, weather monitoring, and remote telemetry, as well as the ADS-SR1 Simplex Repeater, the ADS-WS1 Weather Station, the SSTVCAM slow-scan TV camera, and GTRANS protocol translator for Garmin FMI.
    [ Hits: 208 | Votes: 0 | Rating: 0 ]
Manufacturers : Alternative Power : Solar Panels
  • Small Panel Kits - High performance, IPX7 waterproof small solar panels and battery packs to power radios, sensors, and other portable devices. Solar panels are UV and scratch resistant for long-term use in the field.
    [ Hits: 329 | Votes: 0 | Rating: 0 ]
Manufacturers : Antennas : HF : Magnetic Loop
  • Alpha Antenna - Civilianized and Militarized HF antenna systems for Portable, Base, Mobile, Manpack. Antenna manufacturer based in MO USA
    [ Hits: 625 | Votes: 4 | Rating: 10 ]
Operating Aids : History
  • An Overview of US Amateur Call Signs - Past and Present - QST article from May 1994 about history of call signs from the very beginning to present system. Article explains call sign allocations, call areas, prefixes for novices and prefixes like K WA WB WD, callsigns during and after the world war II and other curiosities on US Call signs.
    [ Hits: 421 | Votes: 0 | Rating: 0 ]
Operating Aids : Traffic Handling
  • NTS Manual - Read more about the purpose, policies, and procedures of The National Traffic System in this 48 pages PDF File
    [ Hits: 447 | Votes: 0 | Rating: 0 ]
Operating Modes : Digital Voice
  • Amateur Radio Digital Voice Systems - A Comparison of most popular Amateur Radio Digital Voice Systems DMR D-Star System Fusion presented by W9HPX Roland at the Charlotte Digital Radio Group in a comprehensive article about Digital Voice
    [ Hits: 457 | Votes: 0 | Rating: 0 ]
Operating Modes : NBEMS
  • NBEMS Primer - The Narrow Band Emergency Messaging System (NBEMS - pronounced N-beams) is a suite of software programs based around Fldigi and designed for point-to-point, fast, error-free, emergency messaging which takes up very little space on the ham bands.
    [ Hits: 246 | Votes: 0 | Rating: 0 ]
  • Narrow Band Emergency Messaging System (NBEMS) - The Narrow Band Emergency Messaging System is a suite of software programs designed for point-to-point, fast, error-free, emergency messaging up to or over 100 miles distant, and takes up a very minimum of space on the ham bands.
    [ Hits: 130 | Votes: 0 | Rating: 0 ]
Radio Equipment : HF Transceivers : Yaesu FT-991
  • FT991 MARS Mod - This modification will expand the tx frequency range of the Yaesu FT-991 from allowing just ham radio bands, to all bands 1.8 - 30MHz and 50-54 MHz.This information is solely for use by licensed members of MARS (Military Affiliate Radio System) or CAP (Civil Air Patrol)
    [ Hits: 917 | Votes: 5 | Rating: 3 ]
Radio Scanning : Police Scanning
  • How Wide Area Radio Systems works - This webpage explains how analog wide area two way radio systems were setup by various states before systems like VIPER, PALMETTO 800, or FLEETNET were established.
    [ Hits: 145 | Votes: 0 | Rating: 0 ]
Shopping and Services : Regional : Europe
  • TelTad Online Shop - TelTad is a Polish amateur radio dealer with an online shop. Products offered includes all major ham radio brands, Yaesu Icom Kenwood, Alpin, OM Power, VPA systems Antennas
    [ Hits: 191 | Votes: 0 | Rating: 0 ]
Software : D-STAR
  • Peanut - Ham Radio Digital Voice Client - Peanut is a free Digital radio client Android App. The App requires a manual registration with the author and allow to chat in proprietary rooms or to connect room linked to DSTAR amateur radio repeaters worldwide. A central Peanut dashboard with current system activity is also available.
    [ Hits: 484 | Votes: 1 | Rating: 10 ]
Technical Reference : Grounding
  • Grounding HF Transceiver using Coax Cable - Improper grounding or earthing system can cause several unwanted RF interferences (RFI) to television sets, broadcast receivers, hi-fi sets and telephone sets. In this Article the author explain how to setup a proper radio shack grounding using coaxial cable and ceramic disc capacitor
    [ Hits: 1283 | Votes: 4 | Rating: 7.75 ]
Technical Reference : Raspberry Pi
  • Raspberry Pi - Packet Radio BBS setup howto - This project describe how to setup a Raspberry Pi Linux system with a few AX.25 packet radio applications already installed on.
    [ Hits: 685 | Votes: 3 | Rating: 9.33 ]

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