ari frequency list6 links
- Recognition of CW signs at different listening levels and frequencies
- The recognition of telegraphy masked by noise at 40 and 80 signs/min telegraphy speed was studied in 10 normal-hearing subjects at different sound pressure levels (25-85 dB SPL in steps of 5 dB) as well as at different test frequencies (2000, 1000, 800, 630, 500 and 250 Hz). The ability to recognize the signs varied with varying SPL. Recognition for most of the subjects was best at an SPL close to 70 dB.
All subjects improved their recognition as the frequency was lowered to 500 Hz, some even at 250 Hz. These facts should be taken into consideration when training telegraphy operators as well as in the construction of radio receivers to permit listening at low frequencies. Furthermore, the critical ratio was calculated at the different test frequencies.
[ Hits: 78 | Votes: 1 | Rating: 7 ]
- The G4PYR MF Coastal Radio Website
- Website dedicated to Coastal Radio Stations, includes frequency lists for memdium frequencies maritime stations
[ Hits: 1788 | Votes: 13 | Rating: 9.7 ]
- UK Scanner Frequencies
- UK frequency list provide reference table to lister to Police scanner channels UHF VHF, Amateur Repeaters, Ambulance CB Radio CoastGuard Rescue, marine VHF, Military and more.
[ Hits: 104 | Votes: 1 | Rating: 1 ]
- Missouri/Kansas Scanner Radio
- Provides comprehensive frequency listings for various public safety agencies and private organizations who operate across the Kansas and Missouri Region.
[ Hits: 10197 | Votes: 63 | Rating: 6.6 ]
- Hungarian Listener Homepage
- FM & SWL, broadcasting, media, FMDX,frequency lists, ham adio
[ Hits: 831 | Votes: 3 | Rating: 10 ]
- Frequency Filer
- Frequency Filer is database program designed for people who use a great many different radio frequencies. It is primarily intended for amateur radio operators, short-wave listening enthusiasts and scanner users. The program makes it easy to keep all of your important frequency information in one place, displayed in a logical format to facilitate easy retrieval.
Frequency information can be displayed as a list and can be viewed on a world globe. Other features include easy data backup and custom field names. Included is database import utility that can be used as a general file conversion utility.
The globe display can also be used as general geographic aid for countries, cities, states, rivers, and lakes. You may even find your home town.
[ Hits: 4406 | Votes: 6 | Rating: 6.5 ]
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