Use in Homebrewing
Homebrewing is a slang term in amateur radio referring to building an alternative to a commercially available piece of equipment or accessory by hand. "Homebrewers" often naturally maintain a sizeable junk box, and amateur radio publications have often employed the term in DIY project articles such as "The 'Junker' Amplifier" from QST, Oct 1970, an RF amplifier built from scrounged and junk-box parts.
Read more about this topic: Junk Box