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Collins 75A-4 Modification Compendium
Collins 75A-4 Modification Compendium consists of 123 pages in an indexed 3-ring binder. It has all of the factory modification bulletins from Collins Radio Company, and all the articles printed in CQ, Ham Radio, QST, and Electric Radio Magazine over the last 50-plus years.

It has been updated June 2013 with a rare Collins document TM-303-9, "Production Test Procedure for 75A-4 Amateur Receiver," as revised October 2001 by George Stevens, WØATA, a retired Collins test engineer.

Price: $27.00