ECS RELAY BOXES

Introduction

I have two ECS Relay boxes which were components of the Apollo Lunar Module built by Grumman Aircraft Engineering Corp. These boxes, along with some other interesting items were bought by me at a surplus auction at Kennedy Space Center, Florida, U.S.A. sometime in the 1970's. I would like to dispose of these items now and donate the proceeds to some charity. Before I do that I would like to find out more about these items. I Have not been able to determine there function on the Lunar Module. Why do they differ in configuration? Does anyone want to buy them? I would also like to comments on how these components compare with today's technology. I would like to hear discussions of how this Apollo technology compares with other technology of that day.

General Appearance

Both of these boxes appear to use the same basic mechanical design and dimensions. There are major differences however, Box #1 has 3 connectors and box #2 has 4 connectors. Both boxes have been opened to satisfy my curiosity. Box #1 has been partially dissassembled.

ECS Relay Box #1

Box #1 Has 3 connectors, J769, J750 and J765. J769 connects to 8 low wattage resisters. Connectors J750 and J765 are connected to three relays, 7K7, 7K6 and 7K5. Other identifying markings are "LDW390-28151-1", "880102 M. R." and "LDW390M10296-1 EOA1".

ECS Relay Box #2

LDW390-28151-3, CL-C S/N 0009, Similar to box 2 but has a fourth connector,J784, and 3 additional relays.