AMSAT-India's VO-52 has completed 8 years in orbit this May, 2013. During its time in operation, it has proved to be a valuable communications resource for the amateur radio community
The overall health parameters of the satellite are excellent and it is hoped that transponder(s) on-board ‘HAMSAT VO-52' will continue to render good services for many more years to come.
How to make contacts through the VO-52 satellite - http://amsat-uk.org/beginners/how-to-work-the-ssb-satellites/
Getting started on Amateur Radio satellites - http://amsat-uk.org/beginners/radcom-getting-started-on-satellites/