To legally operate a [TeleMetrum](../TeleMetrum) system as designed
in the USA, you need at least a "Technician Class" amateur radio
license. This is the entry level license, and getting one is actually
-pretty easy. The exam fee is low, and the license is good for 10 years and
-renewable for life. Anyone who has been through
+pretty easy. The exam fee is low ($15?), and the license is good for 10
+years and renewable for life. Anyone who has been through
the written test for a Level 2 high power rocketry certification will find
taking a ham radio license exam a similar sort of experience. The test is
multiple
for roving in radio contests, and the 6-element 432 Mhz design works fine
for chasing [TeleMetrum](../TeleMetrum)-equipped rockets.
+### Other Uses for an Amateur Radio License ###
+
+The [ARRL](http://www.arrl.org/) web site is full of information about other
+things that people do with amateur radio.
+
+How about a Doppler radar system for tracking rockets at a launch site? Yes,
+someone has actually done it! See [this page translated from Russian](http://translate.google.com/translate?js=y&prev=_t&hl=en&ie=UTF-8&layout=1&eotf=1&u=http%3A%2F%2Fserge77.rocketworkshop.net%2Findex.htm&sl=ru&tl=en)
+for the details!