Update: July 28, 2022
Nine years later, we now have the service manual for the Sony KV 7010U Chromatron and I got brave enough to open the cabinet and tweaked the drives, cleaned the tuner and replaced an antenna wire which looked deteriorated. I found a new Digital Stream digital converter box which has RCA A/V outputs. I set the box and channel selector to channel 4 and used an OTA signal from Phoenix PBS channel 8.5. All three inline cathodes within the single gun measure extremely low emissions, especially the red. The last two photos give an expression of the bad red, but we were still able to get reasonably bright images, a testament to the lack of a shadow mask or aperture grill. The colors are not accurate, but watchable. I don’t believe I posted screenshots prior, so see 4+2 static images below. Photos shot with an iPhone X, processed with Affinity Photo editor.
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