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All kidding aside regarding the metal cone, this unit's chassis can be removed as an individual unit. The yoke, speaker and CRT can be unplugged and the KCS47A can be put on the bench for component testing and replacement. The issue is picture tube substitution using the 5" testing CRT. The 16GP4 is supported in the cabinet by brackets in the front and by braces in the back around the yoke and focus coil. There really isn't an easy way to use the CRT/Yoke/Focus coil outside the cabinet other than fashioning an elaborate, custom mounting jig. Additionally, the chassis needs speaker connection to the filtering voice coil. If I were to go the small CRT route, the HV output would need to be modified to connect an anode to the 5" tube. Even with the smaller and safer tube, at minimum I need to remove the yoke and speaker and set all of them up next to the chassis on the bench probably in some sort of a supporting jig.
Honestly, I don't really see an option easier than working on the chassis from the power section on downstream while occasionally putting it back in the cabinet to check on progress or, in my case, possible mistakes. Unfortunately, the cabinet, CRT and speaker are still in my living room while the chassis is in the basement. I'll need more discipline than I've shown in the past and stop and test often so I don't burry an untraceable mistake.
Any advice or suggestions from the experts here? This would be easier if the CRT was mounted to the chassis but it's not.
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