Version 7.5 of the IARU Region 1 VHF Handbook is now available for download.

The key Amateur Satellite section is on pages 123-131. There are also chapters on Band Planning, Contests, Propagation Research, Operating Procedures. Page 116 defines which way to thread a helical beam antenna.

http://www.iaru-r1.org/index.php/documents/Documents/VHF/Handbook-7.50.pdf/

73 Trevor M5AKA ---- AMSAT-UK http://amsat-uk.org/ Twitter https://twitter.com/AmsatUK Facebook https://facebook.com/AmsatUK YouTube https://youtube.com/AmsatUK ----