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Old 6th Oct 2022, 9:55 pm   #44
Maarten
Dekatron
 
Join Date: Dec 2007
Location: Haarlem, Netherlands
Posts: 4,203
Default Re: Sony KV-A2942U very soft focus in middle of screen

Quote:
Originally Posted by Retrorepair View Post
Trinitrons of course always had more glass than other sets but earlier models usually had metal cages also which didn't help matters.
Early shadow mask tubes also had cages around them. Later integrated into the tube, probably the same with Trinitron. I think most of the metal weight is the tension frame for the wire mask (aperture grille).
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