TM 11-5820-292-20.pdf  Organizational Maintenance Manual for Radio Sets AN/PRC-8, -8A, -9, -9A, -10, -10A and -28.  20 October 1961.
TM 11-612.pdf  Manual for Radio Sets AN/PRC-8, -9 and -10.  September 1951.
TM 11-612a.pdf  Operation and Organizational Maintenance Manual for Radio Sets AN/PRC-8, -8A, -9, -9A, -10 and -10A.

These files are made available with the compliments of August Johnson, KG7BZ.