Collins modifications and service manual for the following radios:

KWM-1, 2 and 2A; 30L-1, 30S-1 and the 32s-1, 2, 3 and the 3A; 75S-1, 2,
3, 3A, 3B, 3C; 516E-1, 2, 516F-2; 62S-1, 51S-1, 55G-1

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