DX stations send a serial number. Maritime mobile stations send ITU Region (1-3). For full contest details and the latest rules, see the ARRL website. ARRL 10m Contest Multipliers ListThere are 97 Multipliers in total, comprising of: Alaska, Hawaii, 49 in Continental USA, 14 in Canada, ...
Chapter 1 Supplemental Articles ∙“Radio Mathematics” — supplemental information about math used in radio and a list of online resources and tutorials about common mathematics ∙“Why an Antenna Radiates” by Kenneth MacLeish, W7TX Chapter 3 Supplemental Articles ∙“Determination of Soil ...