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| name = Radio-controlled models | title = [[Radio-controlled model]]s

|name = Radio listening |title = Radio listening

* {{tl|Radio spectrum}} [[Category:Radio technology navigational boxes]]

| name = Trunked radio systems | title = [[Trunked radio system]]s

| title = [[Radio clock|Time signal stations]] *[[RBU (radio station)|RBU]]

[[Category:Radio spectrum|τ]] [[Category:Radio technology navigational boxes|{{PAGENAME}}]]

| name = Amateur radio topics | title = [[Amateur radio]]

|name = Two-way radio |title = [[Two-way radio]]

|title = [[Amateur radio]] digital modes |image = [[File:International amateur radio symbol.svg|50px|link=|alt=]]

* [[Radio]] ** [[Radio program]]

| name = Radio frequency propagation models | title = [[Radio propagation model|Radio frequency propagation models]]

| group1 = Radio * [[Digital radio]]

*[[Radio atmospheric]]s *[[Whistler (radio)|Whistlers]]

|title = Modes of [[radio propagation]] [[Category:Radio technology navigational boxes]]

* [[Amateur radio call signs|Amateur radio]] *[[Amateur radio call signs in Africa|Africa]]

|group1 = [[Radio]] [[modulation]] *[[Shortwave radio|SW]] ([[High frequency|HF]])

* [[Radio wave|Radio]][[File:Frequency vs. wave length.svg|center|500px]]{{clear}}{{nobold|''{{b | group7 = [[Radio frequency|Radio]]

| group6 = Radio link interfaces [[Category:Computing navigational boxes]]

...[http://www.its.bldrdoc.gov/fs-1037/dir-002/_0220.htm Definition: airborne radio relay], ''[[Federal Standard 1037C]]'', [[General Services Administration]] {{DEFAULTSORT:Airborne Radio Relay}}

| title = [[Antenna (radio)|Antenna]] types [[Category:Radio technology navigational boxes]]