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Antennas : 40M
- NVI 40 Meter Antenna Modeling
- The idea of using a low mount dipole, enhanced with reflector wires directly beneath the dipole, on the ground, appears to be a very good approach to creating an NVI specific antenna for local HF operation.
[ Hits: 2700 | Votes: 0 | Rating: 0.00 ]
- A Cost Effective Current-mode 1:1 Balun
- A cost effective current-mode 1:1 balun can be constructed from a length of coax and a rod typically used for a broadcast antenna loop-stick, some electrical tape, cable ties, a length of PVC water-pipe and some connectors.
[ Hits: 6901 | Votes: 1 | Rating: 10.00 ]
- The Guanella 1:4 balun
- A cost effective current-mode 1:4 balun can be constructed from two lengths of coax, two ferrite rods, some electrical tape, cable ties, a length of PVC water-pipe and some connectors. This form of 1:4 current-mode balun is named after G. Guanella.
[ Hits: 3220 | Votes: 1 | Rating: 10.00 ]
- Axial-Mode Helical Antennas
- Turn Helical Antennas Over Perfect Ground and Modeling Helices in NEC-2
[ Hits: 1762 | Votes: 4 | Rating: 1.75 ]
- Coaxial-feed axiam mode helical antenna
- Coaxial-feed axial mode hemispherical antenna is studied experimentally and theoretically
[ Hits: 1222 | Votes: 0 | Rating: 0.00 ]
- Axial-Mode Helical Antennas
- Notes on Axial-Mode Helical Antennas in Amateur Service. Helix Basics, Modeling Issues, and Short Helical Antennas Over Perfect Ground
[ Hits: 1474 | Votes: 0 | Rating: 0.00 ]
- The normal-mode helix antenna
- A helix will work in the normal mode when the diameter and pitch of the helix is less than 0.1 Lambda
[ Hits: 2696 | Votes: 4 | Rating: 5.75 ]
- A Portable Antenna for Satellites
- A portable antenna for mode B and J satellites
[ Hits: 9741 | Votes: 5 | Rating: 4.20 ]
- Antenna Theory
- Introduction to Electromagnetics, Maxwell's Equations, Transmission Line, Models, scale modeling, constants
[ Hits: 926 | Votes: 3 | Rating: 7.33 ]
- Coax Traps from a Modeling Perspective
- About Coax Traps, NC4FB examine the operation of coax traps through modeling.
[ Hits: 294 | Votes: 0 | Rating: 0.00 ]
- Lincoln Amateur Radio Club
- Everything you need to know about how to being a ham. Classes, testing, operating various modes and equipment
[ Hits: 477 | Votes: 5 | Rating: 9.80 ]
- European PSK Club
- The European PSK Club, or EPC for short, is an informal club of amateur radio operators dedicated to maintaining high levels of amateur radio communications on PSK modes. Its purpose is to promote activity and good operating practice on the PSK modes on all amateur bands
[ Hits: 765 | Votes: 1 | Rating: 10.00 ]
- Digital mode club (DMC)
- Digital Modes Club(DMC) is for all licensed HAM operators and SWL's who likes the digital modes.
It's free lifetime membership.
[ Hits: 2522 | Votes: 9 | Rating: 7.77 ]
- European PSK Club
- The European Phase Shift Keying Club (EPC) was to promote an interest in Amateur Radio to sponsor a series of contests, awards and badges based on the administrative geography of European and other countries by using the PSK mode(s).
[ Hits: 459 | Votes: 1 | Rating: 9.00 ]
- Digital QSO Club
- The Digital QSO Amateur Radio Club DQSO is an informal club of amateur radio operators active use digital modes on all bands. Membership is free for any licensed radio amateurs.
[ Hits: 1439 | Votes: 4 | Rating: 1.00 ]
- HB9FX Internet Remote Base JN37XH Hochwacht Zofingen Switzerland
- Tune and / or listen between 10kHz - 10GHz to professional Online-Receivers as Rhode & Schwarz EK070 or AEG E1900/3, Amateur-Radio-Transceivers, Web-SDR, Digital-Modes, Repeaters, EchoLink, APRS or control Antenna-Switch-Matrix, Antenna-Tuner, SWR & PWR- Control or Web-Cams.
[ Hits: 10444 | Votes: 93 | Rating: 4.80 ]
- Micro908 Kit
- A re-usable control & computing platform for
antenna measurement, PSK31 digital modems, audio filtering, signal source & VFO, memory keyer by AMQRP
[ Hits: 1366 | Votes: 1 | Rating: 10.00 ]
- Have you ever wondered where different modes should be operated, what frequencies to avoid as a courtesy like SSTV etc? This site offer a database for known net frequencies,known segments for different modes, known beacons
[ Hits: 10451 | Votes: 10 | Rating: 7.49 ]
- Manufacturer's representative of wireless communication radio equipment, 2-way radio sales, land mobile radio sales, repeaters, duplexers, antennas, pl tone, hf, vhf and uhf data modems and LAN ethernet radio modems for commercial and amateur radio users.
[ Hits: 315 | Votes: 0 | Rating: 0.00 ]
- Yagi-logper is a linux GPL program to model a Yagi or Log-periodic antennas with horizontal cylindrical dipoles.
[ Hits: 1284 | Votes: 3 | Rating: 7.00 ]
- RUMped is a logging tool for short wave for the MAC under OSX. It is not designed for the daily QSOs. Currently RUMped supports a DX-pedition mode, some major contests and a general contest mode for unsupported contests.
[ Hits: 347 | Votes: 0 | Rating: 0.00 ]
- Freeware Digital modem program for Linux, Free-BSD, OS X, Windows XP, W2K, and Vista. Support several modes and is fully multi platform application by W1HKJ
[ Hits: 9117 | Votes: 12 | Rating: 8.09 ]
- Freeware windows program that allows you to store configuration of your audio mixer in a settings file, and to restore the mixer to
that state whenever you want. Useful for digital mode operations where different dsp programs may require different audio in and out settings.
[ Hits: 1154 | Votes: 1 | Rating: 10.00 ]
- Lightning Safety & Power Quality Issues
- LightningProtection: Lightning Safety & Power Quality Issues. A moderated professional forum by recognized experts, for accurate technical information on lightning, surge and grounding information.
[ Hits: 642 | Votes: 2 | Rating: 10.00 ]
- Mac to transceiver interfaces
- This article illustrate different ways to interconnect a macintosh with a transceiver in order to remote control radios and operate digital modes by Kok Chen, W7AY
[ Hits: 427 | Votes: 0 | Rating: 0.00 ]
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