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#1
11-06-2013, 01:07 PM
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Metal-cone picture tubes
I've never seen a metal cone picture tube. How is it different from a regular tube? How is the anode connection made? Is the whole metal cone at high voltage? If not, is it grounded in the set?
Bob D. 
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#2
11-06-2013, 01:18 PM
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The cone of the CRT is metal to make it weight less than an all glass one. There is a HV lead with a little clip on the end that snaps on at the front rim.
Yes, it's all at high voltage! Don't get near them when the set is running. Here's a 16EP4. The HV lead is the white wire running along the spring holding the front plastic ring on.  Sometimes they came with a little plastic "skirt" to provide a little protection from accidental contact. 
Last edited by bandersen; 11-06-2013 at 01:21 PM.
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#3
11-06-2013, 02:06 PM
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HV connection was usually made to the metal cone CRTs by a small metal clip that attached to the rim/lip at the front of the CRT. Rim is normally covered by a plastic insulator but is shown here on a 16AP4:
http://www.videokarma.org/attachment...5&d=1284095012 jr
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#4
11-06-2013, 11:53 PM
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Quote:
 Most regular tubes have a glass cone, but not these. The cone is metal and will pop you and slam your head into the cabinet! But seriously, they often came with a rubber jacket covering most of the metal surface and plenty of warning stickers for you to read.
__________________
"Face piles of trials with smiles, for it riles them to believe that you perceive the web they weave, and keep on thinking free"
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