Just how bad can an Ion burn be?

[Jon1967us]

I think thats more or less where it landed for the brightest picture.

[kramden66]

If you find a set with X burned into the screen that's from a pirate who left the treasure map with x marks the spot up on the screen for too long

[peter scott]

In extreme cases the glass can even be melted!

Peter

[init4fun]

Originally Posted by kramden66

If you find a set with X burned into the screen that's from a pirate who left the treasure map with x marks the spot up on the screen for too long

Arg , don't ya go be givin the landlubbers all our pirate booty secrets ......

[MIPS]

Originally Posted by peter scott

In extreme cases the glass can even be melted!

Peter

Redefining a glass nipple.

[Electronic M]

Originally Posted by init4fun

Arg , don't ya go be givin the landlubbers all our pirate booty secrets ......

Originally Posted by MIPS

Redefining a glass nipple.

Peter is that a CRT you own or a picture you found? To me that looks like a metal anode connection rather than melted glass. If the glass melted the vacuum would suck it in not bulge it out. I may be wrong but I think that is a test pattern tube...I forget the exact name they had but I've read they had broadcast test pattern generators tubes in the 50s that were basically a CRT with a permanent pattern built in and that they had the second anode connection in the center of the screen because the black spot in the center of the common US indian head test pattern would be there.

[bandersen]

Monoscope.



Also some WWII radar CRTs (3DP1) I think that's what he's showing above.

[peter scott]

Yes, it is a tube I have with an electrode to generate polar displays as in Banderson's post above.
http://www.r-type.org/exhib/abo0197.htm

Peter.

[jr_tech]

Indeed, interesting technology.

https://www.oscilloscopemuseum.com/u...e_ts100-ap.pdf

https://www.oscilloscopemuseum.com/o...-ap-s604c.html

jr

[bandersen]

Very cool. I have one and build a circuit from scratch to generate the circle but not much else. That's the first I've seen of the actual equipment that used them. Lots of tubes in there to generate the sine and cosine waves for the deflection plates.