Antennas : Helical
- 900 MHz Helical Antenna
- Photos and description of a homebrewed 900 Mhz antenna
[ Hits: 3547 | Votes: 13 | Rating: 4.77 ]
- Twin City FM Club
- Largest general-purpose ham radio club in Twin Cities. Three repeaters, fully equipped two position HF club station, contesting, field day, and more.
[ Hits: 2142 | Votes: 6 | Rating: 7.17 ]
- Sandusky Valley Amateur Radio Club
- Information on SVARC & SCARES
[ Hits: 337 | Votes: 0 | Rating: 0.00 ]
- RF Cafe - Amateur Radio Links
- RF Cafe is a unique portal of RF, microwave, wireless, and other engineering resources. Vast collection of equations, references and conversions for electrical, mechanical, physical, and mathematical fields.
[ Hits: 983 | Votes: 0 | Rating: 0.00 ]
- Grumpy's Communications
- Dealer for Charles Gizmotchy Beam Antennas
[ Hits: 1183 | Votes: 5 | Rating: 10.00 ]
- IMEN PAYA Eng. Co.
- Supplier and manufacturer of earthing & lightning protection equipment. Also provider of all electrical instrument, based in Iran.
[ Hits: 673 | Votes: 0 | Rating: 0.00 ]
- Longwave operations
- In the VLF portion of the spectrum it is easy to listen to the emissions created by the Earth itself. These emissions are generated by many different mechanisms and are often beautiful to listen to. Coverage on LF and MF frequencies
[ Hits: 680 | Votes: 0 | Rating: 0.00 ]
- G4ILO Receiving weather satellites
- If you are interested in the environment, the weather and other natural phenomena then there is something magical about being able to see pictures of the earth from space just as it is right this minute. One way you can do this is by receiving images from weather satellites.
[ Hits: 1873 | Votes: 1 | Rating: 10.00 ]
- Tropospheric Ducting Forecast
- William Hepburn's Daily Tropospheric Ducting Forecast.
[ Hits: 5158 | Votes: 23 | Rating: 7.49 ]
- Heathkit Original Manuals
- Heathkit Heath Original Manuals including Ham Parts, Catalogs, Magazines, and other Brands of Ham Amateur Radio Items, including CQ QST GE RCA ER 73
[ Hits: 2948 | Votes: 8 | Rating: 5.13 ]
- Voice of Oromo Liberation (OLF)
[ Hits: 1295 | Votes: 19 | Rating: 4.99 ]
- AZMap - Azimuthal maps generator
- AZMap is a freeware Windows program for the Windows PC which will generate, display, and print an Azimuthal-Equidistance (A-E) map of the world, centered at any point on the surface of the earth (except very near the poles). The A-E map is also known as a Great Circle map since straight lines from the center point to any other point always fall along a great circle path and represent the shortest distance between the center and that point
[ Hits: 9819 | Votes: 45 | Rating: 5.47 ]
- Distance and directions calculation program using both Spheric, the perfect round earth model, and Vincenty's inverse ellipsoid algorithm, the WGS 84 earth model.
[ Hits: 1308 | Votes: 5 | Rating: 3.60 ]
- Add-in module to Microsoft Excel, contains a set of radio amateur relevant special functions:
DistSphericLocator(Loc1; Loc2) Calculates the spheric earth model distance between two locators [km] DirSphericLocator(Loc1; Loc2) Calculates the spheric earth model direction from Loc1 to Loc2
[ Hits: 2025 | Votes: 3 | Rating: 3.67 ]
- Palm Globe - A World Globe for Palm OS
- Displays one hemisphere of the earth from any location. Can also display the greyline, and measure the distance between two points on the globe. It does not do a great circle projection.
[ Hits: 1382 | Votes: 0 | Rating: 0.00 ]
- Simple PSK31 and RTTY program based on the AE4JY PSK engine. Logging inlcudes 10-10 and VP number. Exports to ADIF and CSV.
[ Hits: 2644 | Votes: 4 | Rating: 8.00 ]
- SatEvo is a program to compute the decay or re-entry times of earth satellites. For objects nearing decay, it generates sets of orbital elements for each revolution. The format of the input and output element sets conform to the standard tle format accepted by many prediction programs.
[ Hits: 777 | Votes: 2 | Rating: 5.50 ]
- SATPRO is an earth satellite tracking software package for the IBM-PC and compatible class of microcomputers running MS-DOS. The forte' of SATPRO over other software packages is the accuracy of ephemerides produced and the number of simultaneous propagations that can be accomplished
[ Hits: 1128 | Votes: 0 | Rating: 0.00 ]
- Ballistic simulator Orbit
- Ballistic simulator "Orbit" allows the physical principles of the motion in the gravitational field of the Earth to be demonstrated and learned. You can calculate with this program the ballistic trajectories of the thrown bodies and orbits of spacecrafts and visualize the astroballistic situation on the flat map of the world and on the rotating globe in the real time
[ Hits: 1721 | Votes: 3 | Rating: 7.33 ]
- This program graphically shows world time zones and their corresponding times. Just tap on the map to see the time in that part of the world.
A list of three cities at the bottom of the screen can be customized to any city from the list provided. This list can also be updated using a PC program provided.
[ Hits: 3191 | Votes: 5 | Rating: 7.40 ]
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