if 2000

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if 2000

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Antennas : VHF UHF
  • Modifications to the Diamond V2000 and similar antennas - This kind of antenna has grown in popularity over the last years because it gives you a decent performance and triband capabilities. But its 50 MHz design is far from optimal. Here you can learn how to improve its 50 MHz performance in a very easy way.
    [ Hits: 627 | Votes: 2 | Rating: 9.5 ]
Ham Radio : Clubs : Europe : Germany
  • Amateurfunkgruppe des Computer Clubs Media 2000 - The amateur radio group of the Computer Club Media 2000 want to present not only the beautiful hobby amateur radio but show also what a multi-faceted hobby it is, supporting in repairs of radios, developing their own circuits and the conversion of radio equipment. German group
    [ Hits: 128 | Votes: 1 | Rating: 10 ]
Manufacturers : Amplifiers
  • HF-series Power Amplifier - Manufacture HF-serie power amplifiers for global radio amateurs. Provide two models: manual HF2000DX and automatic HF2011DX-A
    [ Hits: 970 | Votes: 4 | Rating: 3.5 ]
Operating Modes : Morse code : Learning Morse Code
  • Recognition of CW signs at different listening levels and frequencies - The recognition of telegraphy masked by noise at 40 and 80 signs/min telegraphy speed was studied in 10 normal-hearing subjects at different sound pressure levels (25-85 dB SPL in steps of 5 dB) as well as at different test frequencies (2000, 1000, 800, 630, 500 and 250 Hz). The ability to recognize the signs varied with varying SPL. Recognition for most of the subjects was best at an SPL close to 70 dB. All subjects improved their recognition as the frequency was lowered to 500 Hz, some even at 250 Hz. These facts should be taken into consideration when training telegraphy operators as well as in the construction of radio receivers to permit listening at low frequencies. Furthermore, the critical ratio was calculated at the different test frequencies.
    [ Hits: 81 | Votes: 1 | Rating: 7 ]
Radio Equipment : HF Amplifiers : Yaesu FL-2100
  • Fox Tango Yaesu Amplifiers page - A page dedicated to Yaesu FL series RF Amplifiers, from FL-2100 to FL-2000 FL-2500 FL-1000
    [ Hits: 582 | Votes: 0 | Rating: 0 ]
Radio Equipment : HF Transceivers : Kenwood TS-2000
  • TS-2000 eSSB Mods - Kenwood TS-2000 Transmit / Receiver eSSB Modifications by N3GX
    [ Hits: 668 | Votes: 4 | Rating: 5.75 ]
  • TS-2000 Review and Modifications - A forum post at WZ5Q with modifications of Kenwood TS-2000 audio fratures
    [ Hits: 611 | Votes: 0 | Rating: 0 ]
Radio Equipment : Receivers : Icom IC-R7100
  • IC R7100 Specifications - VHF-UHF receiver covers from 25 to 800 and 900 to 2000 MHz in the following modes: AM, AM-W, FM, FM-W, FM-N, USB and LSB
    [ Hits: 277 | Votes: 0 | Rating: 0 ]
Software : Circuit Design
  • EvoSpice - A numerical optimizer (solver) for LTSpice IV. Uses a fast evolutionary algorithm. You can use EvoSpice to design high efficiency power supplies, audio filters, low noise RF amplifiers and an endless list of other applications
    [ Hits: 566 | Votes: 0 | Rating: 0 ]
Software : Log Converters
  • FISTS Log Converter - FISTS Log Converter simplifies various tasks for amateur radio operators. It aids in tracking FISTS Awards, submitting applications, and creating logs for FISTS Activities in Europe like the Ladder and EuCW Snakes & Ladders. Users can generate callsign checklists and import logs from existing logging programs via ADIF files. Available as freeware, it runs on Windows 2000 and later versions
    [ Hits: 19 | Votes: 0 | Rating: 0 ]
Technical Reference : Amplifiers : HF Amplifiers
  • Dentron DTR-2000L restoration - The Dentron DTR2000L is an HF amplifier from the 1980 era. It uses a single 8877/3CX1500A7 tube to produce about a kilowatt of RF output. In this page NR7N includes info on operation, restoration and mods.
    [ Hits: 703 | Votes: 4 | Rating: 9.75 ]

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