1969 Apollo Era Tektronix 453 Oscilloscope Repairs

By Paul Marossy

Last Updated 1/18/23

The A Sweep Triggered light never worked on this unit, which always bugged me. I found a way to simply replace it with blue LED. Also the power supply filter caps were letting too much ripple thru, so I had to replace them. And, the cooling fan needed to be replaced.

A Sweep Triggered LED Modification (to replace burned out light):

Reducing power supply ripple to make X-Y mode usable:

Cooling fan rebuild:

My Original Tek453 Page

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