cat rate
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Antennas : Helical- 13 cm Helix Antenna
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- Here is the design of a 2.4 GHz antenna that is ideal for amateur satellite communications. This antenna is easy to assemble because the design itself tolerates inaccuracies in the construction without really affecting performance.
[ Hits: 65539 | Votes: 90 | Rating: 6.04 ]
- Dish 802.11 Wireless Networking Antenna
- This antenna modification is for the IEEE 802.11b networking protocol that operates at 2.4 GHz. It can be scaled easily to the 5 GHz frequency used by IEEE 802.11a by simply scaling the dimensions on the feed can and the excitation antenna to 2.4/5 = 48% of the dimensions shown above.
[ Hits: 9443 | Votes: 8 | Rating: 6 ]
- Fun With Tubes
- A noncommercial site operated by Max Robinson and
dedicated to passing on and preserving knowledge of vacuum tube circuits and techniques.
[ Hits: 733 | Votes: 5 | Rating: 9.8 ]
- Russian robinson club
- Club Russian Robinson for amateurs interested in radio communication from polar stations, islands and maritime mobile objects RRC founded in 1993. Goals are consolidation of radio amateurs, operating now or operated in the past on islands, drift-ice research, arctic and marine stations, signing their personal callsigns or as participants of DX-peditions.
[ Hits: 786 | Votes: 1 | Rating: 1 ]
- W6MLP Milpitas Amateur Radio and Electronics Society
- The Milpitas Amateur Radio and Electronics Society was formed in 2000 and incorporated in 2002
The club is independent from but supports two volunteer emergency communications organizations: Milpitas Amateur Radio Emergency Services (ARES) and the Milpitas City Radio Amateur Civil Emergency Services (RACES) groups.
[ Hits: 538 | Votes: 1 | Rating: 9 ]
- Pikes Peak FM Association Inc.
- The Pikes Peak FM Association is a nonprofit, amateur radio VHF/UHF group which operates and maintains VHF and UHF communications facilities serving the Colorado Springs and Pikes Peak region.
[ Hits: 711 | Votes: 3 | Rating: 9.33 ]
- K4SBA The South Brevard Amateur Radio Club
- The South Brevard Amateur Radio Club is based in the Melbourne, Florida area and provides volunteer communications services to the public and provides a common organization for amateur radio operators in the south Brevard County area to operate under.
[ Hits: 1301 | Votes: 3 | Rating: 2.67 ]
- Rochester Amateur Radio Club, Inc. (RARC)
- The Rochester Amateur Radio Club, Incorporated (RARC) is an ARRL affiliated club located in Rochester, Minnesota. The purpose of the radio club is to: advance general interest and knowledge of amateur radio
[ Hits: 435 | Votes: 0 | Rating: 0 ]
- Society for the Preservation of Amateur Radio Communications
- SPARC is a nonprofit, unincorporated association located in Toms River, New Jersey
[ Hits: 341 | Votes: 1 | Rating: 1 ]
- Larkfield Amateur Radio Club Inc.
- Currently operate 3 repeater locations in Dix Hills, Huntington and Smithtown on 2 Meters, 1.25 Meters & 70 Centimeters.
[ Hits: 627 | Votes: 1 | Rating: 10 ]
- The Electchester VHF Club
- The electchester vhf club is located in flushing, queens, ny and operates an arrl coordinated, 2 meter, vhf repeater designed for amateur (ham) radio use.
[ Hits: 566 | Votes: 1 | Rating: 5 ]
- Near-Real-Time F2-Layer Critical Frequency Map
- This map can be used to determine the frequencies that will always be returned to the Earth. Transmitted frequencies higher than the indicated contours (which are given in MHz) may penetrate the ionosphere, resulting in lost power to space.
The map shows the radio auroral zones as green bands near the northern and southern poles.
[ Hits: 5270 | Votes: 24 | Rating: 4.84 ]
- Low cost frequency stabilisation
- The Icom IC-746 is quite a popular HF/VHF multimode transceiver which has one shortcoming in its standard configuration when used to operate modes requiring good medium-term frequency stability.
[ Hits: 1724 | Votes: 1 | Rating: 5 ]
- Mod to allow separate RX and TX Antennas
- This modification will allow the use of separate receive and transmit antennas on the Kenwood TS-850S/AT.
[ Hits: 1210 | Votes: 2 | 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 ]
- EggsHam
- EggsHam is a PalmOS application that generates (and grades) _practice_ amateur radio licensing exams. It is for people interested in obtaining an amateur radio license in the US, who want to practice for the Technician, General, or Extra written exam.
[ Hits: 1002 | Votes: 4 | Rating: 9.75 ]
- Grig Radio Control
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- Grig is a freeware simple Ham Radio control (CAT) program based on the Ham Radio Control Libraries (Hamlib). It is intended to be highly generic presenting the user to the same graphical user interface regardless of which radio is being controlled.
Grig supports the most commonly used CAT commands that are implemented by Hamlib, and integrates well with other ham radio programs like Xlog and gMFSK.
Grig has been developed on Linux, but has been ported on Mac and Windows OS.
[ Hits: 26707 | Votes: 17 | Rating: 6.12 ]
- Satellite Finder
- Satellite Finder is a way to accurately point satellite dishes at communications satellites in geostationary orbit.
[ Hits: 3180 | Votes: 10 | Rating: 6.21 ]
- Codec 2
- Codec2 is an open source low bit rate speech codec designed for communications quality speech at around 2400 bit/s. Applications include low bandwidth HF/VHF digital radio.
[ Hits: 1239 | Votes: 0 | Rating: 0 ]
- Simple Reverse Polarity Protection
- This simple modification is applicable to pretty much any 12 volt operated, positive earth equipment. by Chris Cox, N0UK, G4JEC
[ Hits: 1647 | Votes: 0 | Rating: 0 ]
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