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.

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.
http://farm7.staticflickr.com/6209/6...504e400f_b.jpg

Sometimes they came with a little plastic "skirt" to provide a little protection from accidental contact.
http://farm4.staticflickr.com/3182/5...bef722c4_b.jpg

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

:scratch2:

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.