Artifact Details


Pulsed bus transceiver 1665D system building block

Catalog Number



Physical object


1963 ca.


Digital Equipment Corporation (DEC)

Identifying Numbers

Model number 1665D Printed on the solder side of the board in the top corner
Other number 084Y AMPHENOL 143-022-04 Stamped into the female connector
Other number 1665 Stamped into the side of the aluminum frame, the opposite side to the serial number
Serial number 0143812 Stamped into the side of the aluminum frame


overall: 1/2 in x 9 1/2 in x 14 in


The object has a green board surrounded by an aluminum frame and four blue plastic connectors. On one end the connectors are female on the other side they are male. There are several components on one side, including transistors, resistors, and capacitors. There are also 18 red transformers. At one end of the board there are brown wires that form a triangle. There are two round inspection stamps to the side of these wires. On the solder side there is a printed circuit and a lettered grid A-Z.