Portable_operations Portable_operation_(amateur_radio)

-


solar-powered amateur radio station on bicycle


portable operation signified amateur radio operators appending suffix /p callsign. operating /p means stations operating away licensed station address.


the advantages of /p operation include use of large empty spaces full size beam , wire antennas can erected on tall trailer mounted masts. if operating on vhf/uhf, can mean location on top of hill or cliff, clear line of sight horizon. main disadvantage power supply available. normal mains grid power unavailable, /p operator may have resort batteries, portable generators, solar panels. , wind turbines.


operating amateur radio @ sea known maritime mobile , signified suffix /mm on call. operating amateur radio vehicle known mobile , signified suffix /m on call.


a popular pastime portable operation summits on air programme, part of involves portable operation worldwide list of on 73,500 summits.


some countries allow direct connection of amateur transceivers telephone lines called phone patching . thus, traveler may able call amateur station and, via phone patch, speak directly else telephone. 










Comments

Post a Comment

Popular posts from this blog

Water_resources.2C_water_use_and_infrastructure Water_supply_and_sanitation_in_Burkina_Faso

-
the nakambe river in burkina faso in february 2009 during dry season national overview of water resources. water resources scarce in burkina faso. water availability varies between regions , seasons, year year. in south, average rainfall high 1,200mm during six-month wet season, while in north wet season lasts 3 months , rainfall 300mm. rivers in country carry water year around mouhoun river (black volta) , nakambe river (white volta), other rivers carrying water during wet season. building dams has been common way of storing water dry season, though evaporation can reach 2,000 mm/year causing substantial water losses open reservoirs. substantial portion of surface water resources shared neighboring countries. example, nakambe river - main source of supply capital, ouagadougou - , mouhoun river shared ghana. surface water resources vary between 8 billion cubic meters (bcm)/year in average year , 4 bcm in dry year. lower figure corresponds less 300 cubic meters per capita , year, be...
Read more

History Rogers_Park,_Chicago

-
1 history 1.1 native american roots 1.2 settlers 1.3 becoming part of chicago 1.4 neighborhood growth history native american roots the rogers park area developed on once convergence of 2 native american trails, known rogers avenue , ridge boulevard, predating modern metropolitan chicago. pottawatomi , various other regional tribes settled in rogers park season season. name of indian boundary park west of rogers park reflects history pottawattomie park near clark street , rogers avenue. settlers in 1809, karthauser inn established stagecoach stop , tavern. 1 of original settlers (1836) of area phillip rogers, operated toll gate beside home @ ridge , lunt avenues , traded , worked local tribes. during period 1844 1850 arriving settlers started farms along ridge in western portion of rogers park, avoiding flooded lowlands east. in 1870 rogers son-in-law, patrick i. touhy, sold 100 acres land speculators, including john farwell, luther greenleaf, stephen lunt, charles morse, , george est...
Read more

History Jefferson,_Maryland

-
the center of jefferson examined historic maps (griffith 1795; bond 1858; martenet 1865, 1885; lake 1873; usgs1910) depict jefferson on md 180 1795. designated trap town @ close of 18th century griffith (1795). local history suggests name derives large number of taverns operating @ time. purportedly, taverns situated @ both ends of town. consequently, traveler trapped on way in or out of town. the lewis mill complex , george willard house national register of historic places properties near jefferson.
Read more