hi tech

hi tech

Pages: [prev] 1 2 3 4 5 6 7 8 9 10 11 12 [next]

• A better antenna-tuner balun - Which balun to use? The hybrid balun promises advantages over both voltage and current baluns by ZS1AN
  [ Hits: 23095 | Votes: 11 | Rating: 5.83 ]

• Beverages: How Short Can They Be - When we think of Beverage antennas, we automatically think of several acres of land and lots of wire!
  [ Hits: 3759 | Votes: 4 | Rating: 8.5 ]

• Yagi Element Mounting Considerations - One of the most important considerations when designing and building a Yagi antenna is the method used to attach the elements to a boom. This is true because the boom influences the electrical length of the elements. In this article JH Reisert explain with drawings techniques on mounting yagi antenna elements to a boom
  [ Hits: 4306 | Votes: 2 | Rating: 8.5 ]

• A $20 HF mobile antenna - A few hours of fun with PVC and wire and you have got yourself a respectable road radiator. The antenna consists of little more than some PVC pipe topped by a RadioShack replacement whip antenna and a couple of coils made from a small roll of #14 house wire.
  [ Hits: 10547 | Votes: 6 | Rating: 7.33 ]

• PJ2T - Caribbean Contesting Consortium - The Caribbean Contesting Consortium is a contest club dedicated to fun, international friendship, and advancement of the contesting art through superior operating technique and maximum application of technology.
  [ Hits: 476 | Votes: 0 | Rating: 0 ]

• Tech.fahmu.net - KF6SPI Technical blog, audio, hifi, car and ham radio topics
  [ Hits: 409 | Votes: 0 | Rating: 0 ]

• A Ham Radio Public utility HF Station - Merging Internet technology with Amateur Radio holds great promise. This article discusses the authors experiences in putting several Internet Remote Base stations on the air. By Stan Schretter, W4MQ, Brad Wyatt, K6WR, and Keith Lamonica, W7DXX
  [ Hits: 7342 | Votes: 18 | Rating: 3.65 ]

• Austin Antenna - Austin Antenna employs leading-edge antenna technology in the production of the highest performance antennas currently available. Marine Antenna, Multi-band Mobile, Point-to-Point, Base Station, Wide-band Land Based, LPDA, Linear Omni, Triplexer, Scanner Antennas
  [ Hits: 4142 | Votes: 7 | Rating: 8.43 ]

• Chip64 documentation - Nino porcino documentation about CHIP64 digital mode
  [ Hits: 1192 | Votes: 0 | Rating: 0 ]
• Clover - Clover technical specifications, digital communications mode that conveys 8-bit digital data over narrow-band high-frequency radio.
  [ Hits: 930 | Votes: 1 | Rating: 10 ]
• Clover 2000 - CLOVER-2000 is a faster version of CLOVER (about four times faster) that uses eight tone pulses, each of which is 250 Hz wide, spaced at 250-Hz centers, contained within a 2 kHz bandwidth between 500 and 2,500 Hz
  [ Hits: 856 | Votes: 1 | Rating: 1 ]
• Mt-63 technical description - The MT-63 modem, constructed around a high speed DSP processor, either in a dedicated external DSP unit like the Motorola EVM, or in PC software using the PC sound card, transmits 64 tones spaced 15.625 Hz apart, in the 1 kHz bandwidth.
  [ Hits: 632 | Votes: 0 | Rating: 0 ]
• Olivia - The Olivia transmission system is constructed of two layers: the lower, modulation layer is an (almost) classical Multi-Frequency Shift Keying (MFSK) and the higher layer is a Forward Error-Correcting (FEC) code based on Walsh functions.
  [ Hits: 1469 | Votes: 1 | Rating: 3 ]
• Psk31 - PSK31 is a digital communications mode which is intended for live keyboard-to-keyboard conversations, similar to radioteletype. Its data rate is 31.25 bauds (about 50 word-per-minute), and its narrow bandwidth (approximately 60 Hz at -26 dB) reduces its susceptibility to noise.
  [ Hits: 1444 | Votes: 1 | Rating: 10 ]

• Yaesu FT-817 Portable QRP Transceiver - The FT-817 is a small 5W MF/HF/VHF/UHF transceiver with internal batteries. Here is an assortment of technical information K6XX put together about this rig that might interest you.
  [ Hits: 10108 | Votes: 8 | Rating: 5.5 ]

• Kent Communications Inc. - Our goal is to provide the Highest Quality Products and Competent Technical Services at very competitive rates to the Telecommunications and Recreational Industries.
  [ Hits: 743 | Votes: 3 | Rating: 10 ]

• DRM Software Radio Project - The DRM Software Radio is based on the proven Fraunhofer DRM engine, which is considered to be the most advanced DRM engine today, built around fully licensed proprietary DRM encoding technology.
  [ Hits: 4057 | Votes: 4 | Rating: 7.75 ]

• PICBeacon - CW/QRSS beacon, based on a microcontroller PIC16F84, by Microchip, with only few other components. Schematic and component list available
  [ Hits: 2623 | Votes: 3 | Rating: 7 ]

• DigChip IC database - Provider of electronic components documentation. Offer a reliable tool to find semiconductors components technical information like parts, datasheets, cross reference, obsolete and new circuits.
  [ Hits: 615 | Votes: 6 | Rating: 4.17 ]

• Are you ready for BPL - Broadband over power lines (BPL) is a technique for transmission of high speed data (broadband Internet) over powerlines. Access BPL technology injects radio frequency energy into powerlines which were not designed for transmission of radio frequency energy, and leak substantial energy that causes interference to radiocommunications service
  [ Hits: 672 | Votes: 0 | Rating: 0 ]

Pages: [prev] 1 2 3 4 5 6 7 8 9 10 11 12 [next]