NJD Technologies’ Blog pages by KB5NJD, John Langridge, are one of the best sources of information I’ve found for 630m (and 2200m).
W5EST put some of the information in these blog entries into book form. The book has 22 chapters.
I could not find a set of easy links to these, so I have made a set of links to the chapters here.
Chapter-1_Distinguishing630.pdf
Chapter-3_RXs-Decoders-630.pdf
Chapter-6_Storms-Band-Noise.pdf
Chapter-8_Spatial-Diversity-Screen-Sharing.pdf
Chapter-9_630mPaths_Short-Medium.pdf
Chapter-10_TX-Antennas-Hats-Grounds.pdf
Chapter-11_Antenna-System-Concepts.pdf
Chapter-14_TR-Station-Controls.pdf
Chapter-15_Daily-Regimes-Annual-Seasons.pdf
Chapter-16_Etiquette-Band-Planning.pdf
Chapter-17_Propagation-on-Long-Paths.pdf
Chapter-19_630mDaytime-Solar-Eclipsesa.pdf
Chapter-20_Propagation-Mysteries.pdf
Chapter-21_Analyzing-Information.pdf
Learn and Enjoy!
73,
Roger W3SZ