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What changed

Glossary — edited Sep 5, 2026 by NARA Master Administrator

Compared with the version from Sep 5, 2026. Note: Approved suggestion: Amplifier / amp

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**Amateur / ham** — a licensed operator in the amateur radio service.
 
+ **Amplifier / amp** — a stage that raises transmit power. Also, confusingly, everyday shorthand for the ampere; context tells you which is meant.
+  
**ATV** — amateur television.
 
**Balun / unun** — transformer between balanced and unbalanced (or unbalanced and unbalanced) feeds.
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