Artifact Details

Title

Elliott 803B British Germanium Transistor Computer circuit board

Catalog Number

X278.83G

Type

Physical object

Date

1963 ca.

Manufacturer

Mullard- Ltd.

Place Manufactured

U.K.

Identifying Numbers

Other number 100 Scratched into board next to metal plate
Other number PC120/3 On circuit side
Other number TD142A- On metal plate on circuit side
Other number TD142A/100 PN20478 On component side

Dimensions

overall: 5/8 in x 17 in x 10 3/4 in

Description

This is a TD142A unit. The section at the top generated synchronizing triggers from the biphase alpha & beta clock pulses and these triggers were applied to the ferrite core logic elements [brown & brown/white wires]. The logic elements are white. The small silver cylinders are obsolete germanium transistors (small signal). The large oval silver objects are OC23 germanium power transistors. Ferrite cores had inputs connected to stimulate or inhibit the trigger pulse. It was a form of alternating current pulse logic.

Category

Component/module

Credit

Gift of Mr. Soper

Lot Number

X278.83