This HTML5 document contains 34 embedded RDF statements represented using HTML+Microdata notation.

The embedded RDF content will be recognized by any processor of HTML5 Microdata.

PrefixNamespace IRI
dcthttp://purl.org/dc/terms/
yago-reshttp://yago-knowledge.org/resource/
dbohttp://dbpedia.org/ontology/
foafhttp://xmlns.com/foaf/0.1/
dbpedia-wikidatahttp://wikidata.dbpedia.org/resource/
n16http://en.wikipedia.org/w/index.php?title=Alexanderson_Day&action=
yagohttp://dbpedia.org/class/yago/
dbthttp://dbpedia.org/resource/Template:
rdfshttp://www.w3.org/2000/01/rdf-schema#
n17http://rdf.freebase.com/ns/m.
rdfhttp://www.w3.org/1999/02/22-rdf-syntax-ns#
n19http://wikidata.org/entity/
owlhttp://www.w3.org/2002/07/owl#
n9http://en.wikipedia.org/w/index.php?title=Alexanderson_Day&oldid=
wikipedia-enhttp://en.wikipedia.org/wiki/
dbphttp://dbpedia.org/property/
n7http://www.alexander.n.se/
dbchttp://dbpedia.org/resource/Category:
xsdhhttp://www.w3.org/2001/XMLSchema#
dbrhttp://dbpedia.org/resource/
Subject Item
dbr:Alexanderson_Day
rdf:type
yago:Sensing100876874 yago:Look100877127 yago:Event100029378 yago:DecemberObservances yago:Act100030358 yago:Observation100879759 yago:Abstraction100002137 yago:PsychologicalFeature100023100 yago:Activity100407535 yago:JulyObservances yago:SensoryActivity100876737 yago:YagoPermanentlyLocatedEntity
owl:sameAs
yago-res:Alexanderson_Day n17:04mn1r dbpedia-wikidata:Q4720538 n19:Q4720538
foaf:isPrimaryTopicOf
wikipedia-en:Alexanderson_Day
rdfs:comment
Alexanderson Day, named after the Swedish radio engineer Ernst Fredrik Werner Alexanderson and held either on the last Sunday in June, or on the first Sunday in July, whichever comes closer to 2 July, is the day of the open house at the Swedish government VLF transmitter Grimeton, call sign SAQ, located near Varberg. On Alexanderson Day, Christmas Eve, and at other times during the year, the only workable Alexanderson alternator transmitter in the world is used to transmit short Morse messages on 17.2 kHz, which should be easily receivable in all of Europe. The transmitter is preserved as a historical remnant of early radio technology and as an example of VLF (Very Low Frequency) equipment.
rdfs:label
Alexanderson Day
dbo:abstract
Alexanderson Day, named after the Swedish radio engineer Ernst Fredrik Werner Alexanderson and held either on the last Sunday in June, or on the first Sunday in July, whichever comes closer to 2 July, is the day of the open house at the Swedish government VLF transmitter Grimeton, call sign SAQ, located near Varberg. On Alexanderson Day, Christmas Eve, and at other times during the year, the only workable Alexanderson alternator transmitter in the world is used to transmit short Morse messages on 17.2 kHz, which should be easily receivable in all of Europe. The transmitter is preserved as a historical remnant of early radio technology and as an example of VLF (Very Low Frequency) equipment. These transmissions cannot be received by ordinary radios because of their low frequency. Modern enthusiasts often monitor the transmissions using a PC with a coil connected to the soundcard input and FFT analysis software, or a short-wave receiver with an upconverter, or any of several receivers designed to receive VLF transmissions directly. In recent years, Software-defined radio receivers have proven to be very useful and effective in receiving transmissions from SAQ around the world.
dbo:wikiPageEditLink
n16:edit
dbo:wikiPageExternalLink
n7:
dbo:wikiPageExtracted
2019-06-07T12:20:51Z
dbo:wikiPageHistoryLink
n16:history
dbo:wikiPageID
1256065
dbo:wikiPageLength
2138
dbo:wikiPageModified
2018-04-21T01:39:57Z
dbo:wikiPageOutDegree
16
dbo:wikiPageRevisionID
837471731
dbo:wikiPageRevisionLink
n9:837471731
dbp:wikiPageUsesTemplate
dbt:Reflist
dct:subject
dbc:July_observances dbc:June_observances dbc:History_of_radio