I have Tek scopes here at work with probes costing over $3000 each. I still own a lot of Tek stuff but can't afford and won't buy any of their newer stuff. Tek really got laughed at when they were selling portable battery scopes (212 etc) with 500khz bandwidths and the 5110 / D10 series with 2mhz bandwidth for multiple thousands of dollars. Because they had so many in house built hybrid modules and I.C.'s and made them unavailable for do-it-yourself repairs, as well as obsoleting all parts within a short timeframe other players in the oscilloscope game were able to gain traction. Then they started 'costing out' and their reliability went to crap. Tek in the 60's and 70's were bulletproof. death wasn't known by the company I worked for that owned the scopes and they chose not to repair them and decided Tek quality was no longer worth the insane purchase price or factory repair price. I know of two 2213's that got trashed because of the factory screwup that put too much voltage on the C.R.T. As the other posters mentioned, this series of Tek scopes was plagued with CRT focus and brilliance resistor problems as they aged. How does the focus act with the beam at lower brightness? There may be other problems like the beam blanking or beam limiter / CRT bias being somewhat off. It would be hard to maintain focus at that brightness level. It looks like you have WAY too much intensity from the picture.
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