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Text of the page (random words):
ntiguous bandwidth between 5351 5 5366 5 khz on a secondary basis with a maximum power of 15 w eirp equivalent to 9 15 w erp this allocation was adopted at the 2015 world radiocommunication conference wrc 15 website arrl advocates for radio amateurs as fcc proposes changes to 60 meter band zczc ag06 qst de w1aw arrl bulletin 6 arlb006 from arrl headquarters newington ct april 28 2023 to all radio amateurs sb qst arl arlb006 arlb006 arrl advocates for radio amateurs as fcc proposes changes to 60 meter band the federal communications commission fcc is seeking comments about changing the secondary allocation available to radio amateurs on 60 meters the fcc issued a notice of proposed rulemaking nprm on april 21 2023 that deals with the band in a prior petition arrl the national association for amateur radio urged protecting the existing use of the band by amateurs when adding a new allocation adopted internationally currently radio amateurs in the us have access to five discrete channels on a secondary basis 5332 khz 5348 khz 5358 5 khz 5373 khz and 5405 khz users of these channels are limited to an effective radiated power erp of 100 w pep the fcc proposes to allocate 15 khz of contiguous bandwidth between 5351 5 5366 5 khz on a secondary basis with a maximum power of 15 w eirp equivalent to 9 15 w erp this allocation was adopted at the 2015 world radiocommunication conference wrc 15 the federal government is the primary user of the 5 mhz spectrum the government s manager of spectrum use the national telecommunications and information administration ntia has expressed support for implementing the allocation as adopted at wrc 15 doing so would result in amateurs losing access to four of the five discrete channels and power limits would be reduced from 100 w erp to 9 15 w erp however it would provide access to a new contiguous 15 khz band that includes one of the current five channels in 2017 arrl petitioned the fcc to keep the four 60 meter channels that fall outside the new band as well as the current operating rules including the 100 w pep erp limit the arrl petition stated such implementation will allow radio amateurs engaged in emergency and disaster relief communications and especially those between the united states and the caribbean basin to more reliably more flexibly and more capably conduct those communications arrl said that years of amateur radio experience using the five discrete channels have shown that amateurs can coexist with primary users at 5 mhz while complying with the regulations established for their use the petition also stated neither arrl nor apparently ntia is aware of a single reported instance of interference to a federal user by a radio amateur operating at 5 mhz to date in the nprm the fcc recognizes that canada has already adopted 60 meter allocations and related rules that align with those proposed by arrl the commission wrote finally we note that canada has essentially implemented the same rules as arrl has requested the nprm can be found online at https www fcc gov the fcc proposed to allocate the 15 khz bandwidth but stopped short of making a proposal on whether the existing channels should remain allocated to amateur radio and what the power limitations should be they requested comments on their proposal and the related channel and power issues comments will be due 60 days after the nprm is published in the federal register which is expected within the next two weeks nnnn ex source w1aw bulletin via the arrl propagation forecast bulletin 17 de k7ra propagation forecast bulletin 17 de k7ra from w1aw bulletin via the arrl on 2023 04 28 at 0134 utc on april 27 the australian space weather forecasting centre issued a geomagnetic disturbance warning an equatorial coronal hole is currently elevating solar wind speeds combined with the anticipated impact from a recent cme on april 27 geomagnetic activity is expected to be at g0 g1 levels over april 27 28 with a slight chance of an isolated period of g2 solar and geomagnetic indicators moved in opposite directions this week average daily sunspot numbers over april 20 26 made a dramatic drop from 146 9 to 91 4 and average daily solar flux from 164 5 to 139 4 spaceweather com reported that on april 21 a large magnetic filament on the sun exploded hurling debris toward earth later they reported that on april 23 at 1737 utc a cme hit earth sparking a severe g4 class geomagnetic storm aurora was visible as far south as southern new mexico and texas website propagation forecast bulletin 17 de k7ra zczc ap17 qst de w1aw propagation forecast bulletin 17 arlp017 from tad cook k7ra seattle wa april 28 2023 to all radio amateurs sb prop arl arlp017 arlp017 propagation de k7ra at 0134 utc on april 27 the australian space weather forecasting centre issued a geomagnetic disturbance warning an equatorial coronal hole is currently elevating solar wind speeds combined with the anticipated impact from a recent cme on april 27 geomagnetic activity is expected to be at g0 g1 levels over april 27 28 with a slight chance of an isolated period of g2 solar and geomagnetic indicators moved in opposite directions this week average daily sunspot numbers over april 20 26 made a dramatic drop from 146 9 to 91 4 and average daily solar flux from 164 5 to 139 4 average daily planetary a index more than tripled from 8 1 to 26 9 while average middle latitude a index more than doubled from 7 3 to 15 6 solar wind and explosions caused all this grief spaceweather com reported that on april 21 a large magnetic filament on the sun exploded hurling debris toward earth later they reported that on april 23 at 1737 utc a cme hit earth sparking a severe g4 class geomagnetic storm aurora was visible as far south as southern new mexico and texas the planetary k index went as high as 8 over april 23 24 predicted solar flux over the next month is 135 on april 28 30 140 on may 1 2 135 on may 3 4 140 on may 5 6 then 145 150 155 160 and 165 on may 7 11 170 on may 12 13 then 165 160 155 150 145 and 140 on may 14 19 135 on may 20 21 130 and 125 on may 22 23 120 on may 24 25 then 125 130 and 135 on may 26 28 140 on may 29 through june 2 then 145 150 155 160 and 165 on june 3 7 predicted planetary a index is 25 16 and 12 on april 28 30 8 on may 1 5 12 and 10 on may 6 7 8 on may 8 9 then 5 5 and 12 on may 10 12 5 on may 13 15 8 on may 16 17 5 on may 18 22 then 15 and 18 on may 23 34 and 15 on may 25 27 then 12 and 10 on may 28 29 8 on may 30 31 then 5 5 and 12 on june 1 3 and 5 on june 4 6 weekly commentary on the sun the magnetosphere and the earth s ionosphere april 27 2023 from f k janda ok1hh the most important event of the last seven days was the solar flare on 21 april with a maximum at 1812 utc 1744 1857 ut it was a long duration event lde accompanied by the ejection of a cloud of coronal plasma into space at a location on the sun where there is a high probability of the cloud hitting the earth it is therefore not surprising that all forecast centres agreed in predicting the impending disturbance the speed of the solar wind jumped up on 23 april at 1703 utc after which a geomagnetic disturbance began to develop it was much stronger than expected max k 8 and g4 instead of the expected k 6 and g1 2 auroras were observed with two maxima in europe on 23 april mainly between 1900 2100 utc and in north america on 24 april between 0300 0400 utc thereafter propagation conditions deteriorated significantly especially on 24 25 april with one interesting variation of the evolution the calming of the geomagnetic field on the morning of 25 april utc was followed by a further development of the disturbance with an albeit shorter but significant improvement the return of the critical frequencies of the f2 layer and the improvement of shortwave propagation conditions toward the mean continued only slowly in the following days as intervals of increased geomagnetic activity occurred daily the lowest f0f2 were observed on the night of 23 24 april the following night was slightly better rocky riggs w6rjk in truckee california wrote i was not very active until recently when i was introduced to pota the park i frequent the most would typically give me 40 60 contacts in a 2 hour period on monday the 24th i went to the same park and in 30 minutes had no contacts and couldn t hear anyone either i later found out that the solar storm was causing most of our radio problems until then i had never considered much about solar flares or how the sun influences radio propagation now finally i m trying to learn as much as i can the k7ra solar update in the arrl newsletter is fantastic and will be my source going forward to help me learn and understand here s my question is there a real time place where i can go to determine if a particular band has good propagation i typically use 20m and 40m you know like before i go out and get all set up and it s a goose egg i replied i recommend pskreporter info and look on the map screen for ft8 signals from your grid square and where they are heard you don t have to use ft8 to use this you can also check for the country of callsign option with your own or any callsign when i do this for 10 meters this week it has been showing no propagation from my area but lots of 10 meter propagation in the south and across the east coast i use ft8 a lot to study propagation angel santana wp3gw in trujillo alto puerto rico wrote been doing a lot of ft8 these months more dxpeditions are including its operation just last week on april 16th at 1939 utc worked vu7w and in ward april 18th t30un at 0721 on 40m and 0735 on 30m the two atnos i think ward refers to world amateur radio day and of course atno refers to all time new one something i did not know until a few years ago k7ra but on the 20th at 0800 utc saw stations on 10 meters normally you do not hear them on any mode at that time then i began to call them and a few from europe contacted me then at about 0845 utc poof they disappeared these are the things that make me say that it is because of the crazy prop la propa loca tomas hood nw7us has a monthly propagation column in cq magazine which is a great resource in the march issue he writes about the promising progress of solar cycle 25 another great resource is chapter 19 the propagation of radio signals in the 2023 100th edition of the arrl handbook it contains the most comprehensive treatment of radio propagation i have ever seen and goes on for 38 pages aurora observed in china https bit ly 41kyy3w aurora in iowa https bit ly 3nlvy2s an article explaining aurora https bit ly 3n7rom2 a science tech article about sun science https bit ly 429sqq9 from 2017 a nasa sunspot video https www exploratorium edu video nasa life sunspot send your tips reports observations questions and comments to k7ra arrl net for more information concerning shortwave radio propagation see http www arrl org propagation and the arrl technical information service web page at http arrl org propagation of rf signals for an explanation of numbers used in this bulletin see http arrl org the sun the earth the ionosphere an archive of past propagation bulletins is at http arrl org w1aw bulletins archive propagation more good information and tutorials on propagation are at http k9la us monthly propagation charts between four usa regions and twelve overseas locations are at http arrl org propagation sunspot numbers for april 20 through 26 2023 were 97 114 87 86 88 87 and 81 with a mean of 91 4 10 7 cm flux was 147 151 2 141 2 135 2 133 9 130 7 and 136 5 with a mean of 139 4 estimated planetary a indices were 5 9 7 66 76 10 and 15 with a mean of 26 9 middle latitude a index was 5 8 6 32 39 7 and 12 with a mean of 15 6 nnnn ex source w1aw bulletin via the arrl nrao program looking for 18 20 year olds to learn about em spectrum nrao program looking for 18 20 year olds to learn about em spectrum from on 2023 04 28 the national radio astronomy observatory nrao is now recruiting the second group of students for their program exploring the electromagnetic spectrum and why amateur radio matters this program aims to educate emerging generations about the electromagnetic spectrum through an interactive substantive experience with amateur radio website the national radio astronomy observatory nrao is now recruiting the second group of students for their program exploring the electromagnetic spectrum and why amateur radio matters this program aims to educate emerging generations about the electromagnetic spectrum through an interactive substantive experience with amateur radio funded by a grant from amateur radio digital communications ardc the program focuses on broadening the excitement of amateur radio among bipoc and lgbtqia students nrao is looking for 20 students 18 20 years old with an interest in learning about the electromagnetic spectrum and amateur ham radio including obtaining amateur radio licenses the program will begin in september 2023 and run through may 2024 if selected students will receive a stipend 4 000 over the 40 week project meet weekly to learn more about the electromagnetic spectrum and how it is used in a variety of stem fields engage with scientists and engineers using cutting edge technology and software in their fields receive cool technology and tools learn about important wide ranging and exciting pathways toward stem careers prepare to take and pass the technician class amateur radio license test to learn more about this program and to apply students should go to https superknova org ham application details about the national radio astronomy observatory the national radio astronomy observatory nrao is a facility of the national science foundation nsf operated under cooperative agreement by associated universities inc furthering nsf s mission to advance the progress of science the nrao enables research into the universe at radio wavelengths and provides world class telescopes instrumentation and expertise to the scientific community nrao s mission includes a commitment to broader equitable inclusive participation in science and engineering training the next generation of scientists and engineers and promoting astronomy to foster a more scientifically literate society nrao operates three research facilities the atacama large millimeter submillimeter array alma the karl g jansky very large array vla and the very long baseline array vlba which are available for use by scientists from around the globe regardless of institutional or national affiliation nrao welcomes applicants who bring diverse and innovative dimensions to the observatory and to the field of radio astronomy for more information about nrao go to https public nrao edu for more information contact lyndele von schill director of diversity inclusion nrao lvonschi nrao edu dan romanchik kb6nu ardc communications manager 858 477 9903 dan ardc net blackstone valley amateur radio club to hold demonstration saturday blackstone valley amateur radio cl...
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