cat system181 links
Antennas : G5RV
- G5RV - Radio comm. 1984
- Article taken from Radio Communications July 1984 by Louis Varney G5RV
[ Hits: 1056 | Votes: 1 | Rating: 1.00 ]
- QEX Ground System Experiments
- N6LF series of experiments on ground systems for vertical antennas. That series of reports was converted, with some modifications, into a series fo seven articles in QEX magazine.
[ Hits: 609 | Votes: 1 | Rating: 8.00 ]
- Antenna resonance and bandwidth
- About antenna or aerial resonance and bandwidth and the impact of RF antenna resonance and bandwidth on radio communications systems.
[ Hits: 300 | Votes: 0 | Rating: 0.00 ]
- HDSCS Hospital Disaster Support Communications System
- A group of ham operators in Orange County, California that has supported over 30 hospitals since 1980. Includes information on how hams can provide hospital support in their own areas.
[ Hits: 280 | Votes: 0 | Rating: 0.00 ]
- The Austin QRP Club
- The A QRP Club is a small group of Amateur Radio enthusiasts who enjoy building, operating and (mostly) talking about Low Power radio communications, equipment and systems.
[ Hits: 479 | Votes: 1 | Rating: 10.00 ]
- Southeastern Asterisk Radio Networks
- Interoperability solutions via Asterisk based RF Gateways - Southeastern Asterisk Radio Network (SEARN) and the Southeastern Asterisk Amateur Radio Netwok (SEAARN) are designed for the purpose of developing interoperability capabilities amongst diverse communications systems. Digital Amateur Radio Project Association - DARPA expanding the digital experience.
[ Hits: 305 | Votes: 2 | Rating: 4.50 ]
- Vortex Antenna Systems
- Vortex Antenna Systems, radio communication antenna aanufacturer and supplier of antenna related hardware. Ham radio HF and VHF Antennas, antenna parts, mast and mounts.
[ Hits: 2419 | Votes: 2 | Rating: 5.50 ]
- TCI International
- US global provider of innovative radio frequency (RF) solutions for spectrum monitoring and antenna applications. Specializes in Spectrum Monitoring, Communications Intelligence , HF/MF Broadcasting & Communication antenna systems.
[ Hits: 376 | Votes: 0 | Rating: 0.00 ]
- Kathrein Inc
- Manufacturer of professional antenna and filter systems for communications and broadcasting, serving commercial and governmental markets worldwide.
[ Hits: 454 | Votes: 2 | Rating: 5.50 ]
- STAR-H Corporation
- STAR-H Corporation specializes in extremely wideband dipoles and compact low-profile antenna systems for military, emergency management, commercial operations and consumer wireless applications.
[ Hits: 286 | Votes: 2 | Rating: 10.00 ]
- RSQ Signal Rporting for Digital Modes
- This site is devoted to promoting RSQ as an improved signal reporting system for narrow band digital modes and to demonstrating its application to the popular PSK31 mode.
[ Hits: 567 | Votes: 1 | Rating: 5.00 ]
- CAT for Kenwood TS-50
- CAT (Computer Aided Transmitter) system operations for the Kenwood TS-50
[ Hits: 3017 | Votes: 7 | Rating: 5.43 ]
- Global Microwave Systems
- GMS Inc. offers the latest in microwave communications equipment.
[ Hits: 223 | Votes: 1 | Rating: 10.00 ]
- This software predicts future passes for amateur radio satellites for a specified location and period of time. It runs on the Android operating system
[ Hits: 2657 | Votes: 1 | Rating: 7.00 ]
- PstRotator handles just about every controllable rotator in common use:
Prosistel, Green Heron, HyGain, RC1 MDS, Rotor-EZ Idiom Press, Yaesu Az and many more
PstRotator includes automatic tracking for satellite or EME communications, using programs like WSJT, VQLog, TACLog, Z-Track, GJTracker, EME System, Trak_SM, WXtrack, WinOrbit, Orbitron, Nova for Windows, Sat_Explorer, SatPC32, Win-Test.
PstRotator supports remote control over TCP/IP.
[ Hits: 3097 | Votes: 28 | Rating: 8.75 ]
- Implementation of NORAD SGP4/SDP4 algorithms in PHP for determining a satellites location and velocity in Earth orbit. These SGP4/SDP4 models were ported from Predict 2.2.3 written by John A. Magliacane (KD2BD) for the Linux operating system.
[ Hits: 587 | Votes: 5 | Rating: 10.00 ]
- Elmer for iPhone
- iPhone Software to practice taking your Ham Radio Exam
[ Hits: 691 | Votes: 1 | Rating: 1.00 ]
- Friis-It NF for iPhone
- Friis-It NF is the first iPhone OS based application that allows you to calculate noise figure, system sensitivity, and cascaded gain for an RF Receiver system
[ Hits: 441 | Votes: 1 | Rating: 10.00 ]
- Ferrite in EMC applications
- Electro-magnetic compatibility EMC issues arise when electronic systems interact in an un-desired way
[ Hits: 341 | Votes: 1 | Rating: 9.00 ]
- TenTec Omni VI AGC modification
- Modification leaves nearly all of the existing Omni agc circuitry intact, simply add an audio detector which modifies the delay characteristics of the original system by G3IXQ
[ Hits: 493 | Votes: 0 | Rating: 0.00 ]
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