ch 19 frequency
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- What is Horn Antenna
- Horn Antenna - The energy of the beam when slowly transform into radiation, the losses are reduced and the focussing of the beam improves. A Horn antenna may be considered as a flared out wave guide, by which the directivity is improved and the diffraction is reduced. One of the first horn antennas was constructed in 1897 by Bengali-Indian radio researcher Jagadish Chandra Bose in his pioneering experiments with microwaves. The modern horn antenna was invented independently in 1938 by Wilmer Barrow and G. C. Southworth. This Horn model antenna is suitable employed in the UHF or SHF radio bands. Making this horn model antenna it will be easy for a beginner to make if it works in the 10GHz frequency, because small dimensions so it is not so difficult and also offers gain up to 25dBi.
[ Hits: 74 | Votes: 0 | Rating: 0 ]
- Collins 618F-1A VHF Aircraft Transceiver
- Restoring a 1965 Collins 618F-1A VHF aircraft radio. This radio was designed for light aircraft as an early frequency-synthesized radio built in 2 separate chassis.
[ Hits: 313 | Votes: 2 | Rating: 10 ]
- WD8KAF Live Repeater Stream
- This repeater is broadcast from Coldwater, MI on a frequency of 147.300 MHz. Owned and maintained by the Branch County Amateur Radio Clu
[ Hits: 2328 | Votes: 4 | Rating: 4.25 ]
- Ham Radio Live from Dallas, Texas
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- An online Ten Tec Pegasus with a schedule of frequencys monitored, by Bob, K5AHT, Bill, K5WGA and Pete, AE5PL.
[ Hits: 66216 | Votes: 280 | Rating: 5.54 ]
- ICOM IC-R75 Review by N9EWO
- Icom IC-R75 tabletop HF communications receiver came onto the market back in 1999 and was taken out of production in late 2015. Frequency coverage is from 30 hz right to 60 MHz. This allows one to catch the 6 Meter amateur band as well.
[ Hits: 44 | Votes: 0 | Rating: 0 ]
- Understanding computer-generated RFI
- Radio Frequency Interference (RFI) has always been a source of concern for the Radio Amateur. Until the recent introduction of complex circuitry in the home, our communications gear has been the main source of potential RFI. In this computerized age of ours, increasingly complex and sensitive receivers are being barraged by these and other sources of RFI.
[ Hits: 84 | Votes: 0 | Rating: 0 ]
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