I've been trying to restore a 577 D2 that had several problems. The previous owner(s) hacked up the -12V supply and the regulator was floating, unheatsinked. The 200V fuse was blown (cautiously replac

Thanks for the suggestions everyone, I will start with cleaning the soot. The D2 is the non-storage. The front-panel intensity pot is very linear, delivering -30..30V to the HV board. But the intensit

While cleaning soot off of everything, I pulled the CRT connector off the back and an orange plastic segment crumbled to dust. The connector still has a visible key but the CRT doesn't, so I guess tha

Cleaning the contamination everywhere, and replacing the pots in the 577 HV driver did not fix the display, so I managed to get a rackmount 5110 at auction. It has a crisp stable display. Looking insi

Any advice on getting the tube out? I assumed if I removed the top and bottom rubber gaskets from the front panel it would slide out fairly easily, but it is fighting me so far. The gaskets appear to

It took about 30 minutes of prying around the rubber gasket to free the '577 tube. I broke the gasket too. On the other hand the 5110 tube came out very easily. On swapping it I get a pretty stable di

The shimmering I described was called "double traces" and a fix was described here: https://groups.io/g/TekScopes/topic/77914568#175831 by Jack2015, where adjusting the value of R318 eliminates it. I'

That's interesting, my 576 had black soot all inside the HV cage and its components, along the wiring all the way up to the CRT yoke. Do you mean everywhere, or confined to that area? The soot contami

I managed to replace the lever on my 177 without unsoldering everything, it was just barely possible to maneuver it back and then at an angle to access the front without shorting all the bare wires be