Artifact Details


Pulsed bus transceiver 1665D system building block

Catalog Number



Physical object


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. At the top of the triangle there are two round inspection stamps. On the solder side there is a printed circuit and a lettered grid A-Z.


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 152Y 143-022-04 Stamped into the female connector "Amphenol" is stamped before the number
Other number 1665 Stamped into the side of the aluminum frame, the opposite side to the serial number
Serial number 0268755 Stamped into the side of the aluminum frame


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