abstract cathode computer crt display monitor plastic ray stand technology tube white yellow background backrop black board brown cathodes circle circles circuit circuitry circular close close-up closeup dot dots electronic electronics free geometric geometrical geometry gold golden green image line linear lines macro maroon mechanism orange photo photograph picture resource round stock tech techno technological texture textured UP blue amplifier ancient anode component diode electrical glass old piece radio reflective reflector triode vacuum tube blur design grill grille light pattern rgb television tv
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