Department of the army technical manual & Department of the Air force technical manual. TM 11-263....TO 31R2-2GRC9-1....RADIO Sets AN/GRC-9..AN/GRC-9A...AN/GRC-9X...and AN/9Y..
Although dated 1956 it has the same information on the GRC-9 Radio. Great book if you have this type of radio. Condition is used.
Price £16 + £4 postage and packing
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