I picked up a 465B (two channel 100MHz portable scope from the 70's) for $5.00. It had a strange horizontal problem with the trace barely hitting the screen. I had a service manual so I opened it up and luckily found a broken trim pot in about 5 minutes. Didn't even have to fire up a test scope. I was able to replace the pot and get the scope working. It worked for a couple of years and one day it stopped. One of the filter caps had given up. I had to improvise fitting a new cap, but it's still working today. Though about replacing all the filter caps, but decided not to bother.
Many times you need a working scope to fix one that is malfunctioning. Below is a thread from DIY Audio where I helped a guy in Serbia get his scope going. It was a difficult job, in the end he had to just slog it out and find the one component that was causing the malfunction. Tektronix 465 Sweep generator - diyAudio
Many times you need a working scope to fix one that is malfunctioning. Below is a thread from DIY Audio where I helped a guy in Serbia get his scope going. It was a difficult job, in the end he had to just slog it out and find the one component that was causing the malfunction. Tektronix 465 Sweep generator - diyAudio
Comment