1969 Apollo Era Tektronix 453 Oscilloscope Repairs
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: