Wallpaper refers to awards and certificates earned in ham radio. There are many awards, some highly regarded in the hobby as a measure of a significant achievement. DXCC – confirming contacts with 100 or more distinct “entities” (think countries although some entities are not a unique country like Alaska and Hawaii). Another notable award is WAS – Worked all States. There are even categories within categories – for example, You can earn WAS Triple Play – WAS in three distinct modes: Phone, Digital and CW. How about working all counties in a state? Sure, why not!
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European Phase Shift Keying Club (EPC). There are tons of certificates to earn in various categories. First you join (free) and then download an app that will analyse your .adif log file and determine eligibility for the various awards. Here is my member certificate and below then a slideshow of some of the awards I’ve earned.