radio frequency
213 links - and 6 categories
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Antennas : Spiral- Petlowany Antennas by K6NO
- WorldRadio Article on Petlowany antennas base on this principle: if a length of wire is wound into a spiral-shaped coil and excited by a radio frequency current connected to the innermost portion of the coil, it will then, and only then, exhibit RF characteristics that closely approximate those of a resonant linear wire of the same length
[ Hits: 3765 | Votes: 9 | Rating: 6.22 ]
- VA3GRR - Radio Beacon
- VA3GRR is a radio beacon, operating on the 10 meter amateur band. Its frequency is 28.205.5 MHz. It runs just under 5 watts of power into a vertical half-wave ringo style antenna
[ Hits: 476 | Votes: 1 | Rating: 10 ]
- K9ZW Blog
- With Varying Frequency - Amateur Radio Ponderings
[ Hits: 407 | Votes: 0 | Rating: 0 ]
- RFS
- Radio Frequency Systems (Formerly Celwave, Cellwave, Cablewave),Wifi antennas, duplexers.
[ Hits: 477 | Votes: 0 | Rating: 0 ]
- Allocation of Radio Spectrum
- This is the table of contents to a list showing how the radio frequency spectrum is allocated to different users in the United States.
[ Hits: 1473 | Votes: 1 | Rating: 6 ]
- Shortwave Frequency Guide
- Frequency list with service name and related comments
[ Hits: 1448 | Votes: 2 | Rating: 1.5 ]
- New England Historical Radio Society
- The New England Historical Radio Society Inc. is an organization dedicated to the preservation of commercial Morse Radiotelegraphy on medium and high frequency.
[ Hits: 529 | Votes: 0 | Rating: 0 ]
- Understanding propagation numbers
- Quick reference table on understanding A K SFI indexes and how can be translated in usable frequency opportunities
[ Hits: 2749 | Votes: 4 | Rating: 10 ]
- The KA7OEI FT-817 pages
- FT-817 Radio Modifications, Improving the FT-817 Noise Blanker, increasing output power, using rechargeable cells, epanding frequency range
[ Hits: 982 | Votes: 0 | Rating: 0 ]
- Frequenzdatenbank.de
- Frequency database for Germany. Emergency services, aircrafts, radio and paging system with over 2000 frequencies from all over Germany.
[ Hits: 1410 | Votes: 14 | Rating: 4.15 ]
- LCD Digital Dial DDS VFO
- Low Cost frequency counters and DDS VFO's for QRP and Vintage Radio's. LCD Digital Display, Frequency Counter or DDS VFO
[ Hits: 804 | Votes: 2 | Rating: 5.5 ]
- RadioComm
- RadioComm can be used to program your Icom radio's memory, or to create nice radio-frequency spectra or to interface your radio to a huge database of frequencies.
[ Hits: 1227 | Votes: 3 | Rating: 10 ]
- Universal frequency counter & voltage meter
- to be used with QRP transceivers
[ Hits: 1348 | Votes: 1 | Rating: 10 ]
- 75 meter AM Transceiver
- Frequency coverage: 3.75 MHz to 4.00 MH transceiver for 75 MHz band
[ Hits: 1189 | Votes: 1 | Rating: 10 ]
- Legendary microphones for ham radio
- Graph of the frequency response of some of the legendary microphones favoured by radio hams
[ Hits: 817 | Votes: 1 | Rating: 1 ]
- Beware: RF Safety Considerations!
- RF Safety reource page with links and more documentation on radio frequency safety
[ Hits: 413 | Votes: 0 | Rating: 0 ]
- FCC OET -- Radio Frequency Safety
- FCC Policy on Human Exposure to Radiofrequency Electromagnetic Fields
[ Hits: 352 | Votes: 0 | Rating: 0 ]
- TVi Basics - making filters
- TV Interference filters, making TVI filters, coaxial filters to eliminate TV interferences caused by radio frequency
[ Hits: 1027 | Votes: 0 | Rating: 0 ]
- Noise tutorials
- Noise foundamentals. Radio frequency interference noise.
[ Hits: 742 | Votes: 0 | Rating: 0 ]
- Harmonic Converter for Spectrum Analyzers
- Extending the frequency coverage of spectrum analyzers, Harmonic mixer by Matjaz Vidmar, S53MV
[ Hits: 1248 | Votes: 1 | Rating: 8 ]
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