on line radio

on line radio

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• The Antenna Torque Calculator - This unique online tool helps Ham Radio operators to choose the right rotator for medium and large HF antenna systems. The algorithm implemented in this calculator is the result of 40 years of experience in the HF Antenna sector. Given the Wind Speed, the total antenna square area, and the boom length, it will return the calculated torque value.
  [ Hits: 183 | Votes: 1 | Rating: 1 ]

• Common Mode Currents on Coax - These baluns are used to attenuate the common mode current that flows on the outside of the coaxial feed line.
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• Improving the Super-J - The collinear J-Pole, often known as the Super-J, does improve the behavior over a regular J-Pole. As many attest, there is an advantage when vertically combining 1/2 radiating sections to have a bit of separation between the half-wave end points. The Super-J has very little separation between the two half-wave radiators.
  [ Hits: 972 | Votes: 2 | Rating: 5.5 ]

• PY0F Noronha Contest Group - The Noronha Contest Group is a DX and Contesting group formed by experiencied operators from Brazil with the aim to have fun and participate on the main Amateur Radio Contests & Activities. QSL info, log online and contest results
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• 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.
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• HyEnd Company - HyEnd is a dutch amateur radio antenna manufacturer. Makers of the popular HyEndFeed Antennas, produce Baluns, bandpass filters and selle Line isolators, coax cables and connectors.
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• 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.
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• Morse Code Audio Lessons - Morse Code Training online audio recordings, grouped in three different levels for a total of 37 different exercises provided by Scarborough Amateur Radio Society
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• Oscar 100 Bandplan - P4-A narrowband transponder Operating Guidelines and Band Plan, coverage map of the QO100 geostationary amateur radio satellite
  [ Hits: 259 | Votes: 1 | Rating: 5 ]

• Band Conditions - Current HF band conditions online report and graphs. This page provides band condition information to CW and SSB Contesters. It can also be of benefit to other Radio Amateurs to determine band condtions for Nets and casual QSO
  [ Hits: 3524 | Votes: 22 | Rating: 7.9 ]

• QRPparts - Online NOS electronic parts shop for QRP-QRPp radio constructors, to vintage radio and electrical measuring equipment restaurators. Many Germanium diodes, transistors and RF parts, semiconductors.
  [ Hits: 247 | Votes: 1 | Rating: 10 ]

• Custom QSL Cartoons - Custom qsl cartoons personalized for ham radio operators and CB radio fanatics. Cartoons created for your own qsl card line with custom cartoons you want
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• Hjem - Velkommen til Nye Norworld online - Selling all brands of Hamradios and CB Radios based in Norway
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• inRadio Centrum Radiokomunikacji - Amateur radio dealer and on-line shop of major ham radio market brands, established in 1990, based in Poland.
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• 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
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• Delta Electronics - Delta Electronics, Inc. NY USA, family owned and operated selling all varieties of consumer electronics including 10 meter amateur radios, antennas, accessories, microphones, cw transmitters, coax cables and more
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• APRS Online Passcode Generator - Generate APRS Passcode using PHP for use in Amateur Radio APRS Applications when connecting to the APRS-IS Network
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• Coax Loss Calculator Online by K5VR - RF Feedline (Coax and Ladder-Line) Loss and ERP Calculators made with Javascript. This complex feddline loss calculator has already several line types paramenters for most common coaxial cables from Belden, Time LMR, Wireman and other common products. Result will give Matches loss, SWR loss, dB and Watts power loss.
  [ Hits: 252 | Votes: 2 | Rating: 5 ]

• Tektronix Compatible Tracking Generator - A spectrum analyzer is always an usefull amateur radio test equipment that should be present in a radio shack. Hams can use it for testing frequency response of filters, amplifiers, and other two-port RF devices. This article illustrate a tracking generator compatible with any spectrum analyzer in the Tektronix 490- and 2750-series lineups
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• What is SWR - standing-wave ratio - Article about Standing-wave ratio (SWR) defined as a mathematical expression of the non-uniformity of an electromagnetic field on a transmission line. SWR is the ratio of the maximum radio-frequency (RF) voltage to the minimum RF voltage along the line.
  [ Hits: 191 | Votes: 0 | Rating: 0 ]

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