Hi Everyone, I'm starting to have some issues with my Tektronix 475 scope where after it warms up for about 5-10 minutes the beam goes out. If I press the ch1/alt/add or ch2 buttons I see the beam flash on/off. Same if I turn the trigger or delay knobs it comes in and out. Pushing the chop button brings both ch1/ch2 beams on for some reason. After a while the beam will come back. Letting the scope cool off will normally bring the beam back. Last year I did clean some contacts - this seems to be heat related though. Has anyone seen this? or is there forum out there that someone recommends specifically for old tek scopes? https://youtu.be/GZxO8YkzaBM Thanks! Matt _______________________________________________ Techtoolslist mailing list Techtoolslist@flippers.com https://pairlist7.pair.net/mailman/listinfo/techtoolslist FTP site is: ftp://ttl.arcadetech.org/TTL/Test_Equipment Archive site: http://seven.pairlist.net/pipermail/techtoolslist/