Fixing and modifying the Tektronix 491 IF attenuator for external use - part 1

In this video, I am using the IF attenuator of the Tektronix 491 as an external general purpose module. I find the issues with the badly drifted resistors, I replace them and finally fix the attenuator.
Make sure you watch the other parts of the video.
Check out also my main website at qrp.gr