The Mackay 128-AY Receiver
Some years ago, I tried to find a manual for the Mackay 128-AY shipboard receiver. I was able to find a manual issued to the U.S. Coast Guard which covered nearly the same receiver, the 128-AZ, under a Coast Guard designation RC-123. The schematic diagram was originally separated into three pages, and the wiring diagram into two pages. Recently, through the kindness of David Sampson, I was loaned a complete manual for the Mackay 128AY, and I have uploaded it here. I have also included a high-resolution .JPG of both the complete schematic and of the wiring diagram. The files for the Coast Guard 128AZ are here also. Use what you need.
The PDF contains all the above.
