system 9

system 9

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• A Lowband Antenna that is Almost Free - The Shunt-fed Tower, an effective Low Band Antenna, uses your beam as a capacitive top-hat and only needs a simple feed network and a good ground system to work DX on 80M and 160M.
  [ Hits: 18748 | Votes: 4 | Rating: 7.75 ]

• 160 meter sloper antenna - The 160-meter sloper system at K3LR
  [ Hits: 11501 | Votes: 7 | Rating: 3.85 ]

• Understanding Standing Wave Ratios SWR - We worry a lot about Standing Wave Ratio (SWR) in amateur radio since SWR is one indication of how well our antenna system is working. Most HF transceivers and antenna tuners have built in SWR meters. SWR is a measure of a transceiver' s output power verses the portion of that power reflected by the antenna system
  [ Hits: 8719 | Votes: 8 | Rating: 4.75 ]

• QTH.COM Ham Radio Classifieds - Large on-line ham radio classified ad system, free for all users.
  [ Hits: 4868 | Votes: 15 | Rating: 8.6 ]
• Electronics & Communications Classifieds - Forum based classified ads system dedicated to electronics and radios
  [ Hits: 905 | Votes: 2 | Rating: 10 ]

• RACOM - Radio modems - RACOM is a Czech company specialized in design and production of radio modems and other devices for wireless data networks for radio channels from 140 to 900 MHz. RACOM radio data networks are suitable for data transfer in telemetry & SCADA applications, transaction networks, security systems, IP networks and firts of all mobile tracking and fleet management.
  [ Hits: 924 | Votes: 2 | Rating: 9 ]

• E. H. Armstrong - Radio's premier inventor, Edwin H. Armstrong was responsible for the Regenerative Circuit (1912), the Superheterodyne Circuit (1918), the Superregenerative Circuit (1922) and the complete FM System (1933)
  [ Hits: 962 | Votes: 5 | Rating: 9.4 ]

• The Brookdale ATV Repeater System - Provide an ATV repeater function for the North Jersey Exterior Area that is available not only for general amateur radio use, but also for providing a unique communications resource during emergencies as well (FCC Part 97.1 (a))
  [ Hits: 564 | Votes: 0 | Rating: 0 ]

• Bass Amateur Radio Irlp Group Inc - The bass amateur radio IRLP group node 6391. victoria australia. info IRLP stands for the Internet Radio Linking Project. The aim of this project is to link radio systems separated by long distance without the use of expensive leased lines, satellites, or controllers.
  [ Hits: 1186 | Votes: 22 | Rating: 6.71 ]

• Yaesu FT-897D System Diagram - Interconnecting the YAesu FT-897 or 897D
  [ Hits: 3054 | Votes: 1 | Rating: 1 ]

• Dino's Tower Service - Located in North Florida, specializing in tower installations, antenna assembly, and wire antennas. Experience includes a variety of antennas and towers from Rohn 25 up to Rohn 65 and rotating tower systems (KOXG).
  [ Hits: 1167 | Votes: 1 | Rating: 1 ]

• Ciro Mazzoni - From 1973 we work in the communication system on HF, VHF, UHF, SHF for P.M.R., OM and broadcasting.
  [ Hits: 774 | Votes: 0 | Rating: 0 ]

• Spy Stations and Cryptography - This article first appeared in the October 1998 issue of Monitoring Times
  [ Hits: 938 | Votes: 3 | Rating: 9.33 ]

• CTJ Contest Software - By 9H1EL, supports RSGB 21-28, BERU, IOTA contests, FOC marathon and IARU 50MHz trophy, Control of FT1000MP, all Kenwood and ICOM Radios which have CAT system.
  [ Hits: 2926 | Votes: 8 | Rating: 8.63 ]

• RXClus - RXCLUS is a free windows amateur radio software especially designed for the DX'ers and SWL's wanting to receive the informations transmitted by packet radio on the DX-cluster system. It supports also telnet protocol.
  [ Hits: 8021 | Votes: 20 | Rating: 7.84 ]

• HAM-LCT - Freeware logbook program with many features, includes CAT system and database for yaesu Icom and kenwood rtx. This program is currently discontinued by the author who developed another ham log program for windows.
  [ Hits: 7128 | Votes: 4 | Rating: 6 ]

• TS9235 - Radio Management Software for the Radio Shack® PRO-92, PRO-93, PRO-2067, PRO-2053, PRO-95 and PRO-96 multi-system trunking scanners.
  [ Hits: 2160 | Votes: 0 | Rating: 0 ]

• Gpredict - Gpredict is a satellite tracking program for Unix-like operating systems. In the begining (v. 0.1.x) Gpredict was just a GUI client to John Magliacane's excellent satellite tracking program, Predict, but due to performance problems it has been decided to include the tracking code directly into Gnome Predict (v. 0.2.0 and later).
  [ Hits: 3567 | Votes: 8 | Rating: 9.25 ]

• EMI Calculator - Does your Amateur Radio system comply to the EMI rules ? (German values implemented)
  [ Hits: 1509 | Votes: 8 | Rating: 6.63 ]

• Arrlweb: amateur refutes fcc's clean bill of health for northcarolina bpl system - North Carolina amateur is refuting a clean bill of health the FCC gave this summer to a BPL field trial system in the Raleigh area.
  [ Hits: 397 | Votes: 0 | Rating: 0 ]

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