Why no neck glow?

demogo

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Why can't I see neck glow on my G08?

It works -- I can see a picture.

On my G07 and Pentranic monitor I can look up at the neck and see a faint orange glow but not on my G08.

Any theories as to why?
 
Some tubes are like that, I noticed that on one of my tubes once

If the screen works the heater must be on, if the heater stops the picture fades to black, for sure :)
 
Okey dokey.

I'd like to use the neck glow = monitor has power as a diagnostic step but I guess the the opposite isn't necessarily true. :(
 
Why can't I see neck glow on my G08?

It works -- I can see a picture.

On my G07 and Pentranic monitor I can look up at the neck and see a faint orange glow but not on my G08.

Any theories as to why?

Room may not be dark enough. I usually wipe off a little dust from the neck to see it.
It may just be dim, but it's working if you have a pic.

Put a voltmeter back there across the two heater pins. You should see a small (~6V) reading.


Another thing- more theoretical: A vector monitor is tracing out a limited number of lines every second. A raster monitor is really modulating the color and intensity of a constantly scanning beam across the screen. Perhaps a slightly cooler heater generates enough electrons to throw at the vector screen while the raster screen needs more and thus a hotter heater.
K
 
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Room may not be dark enough. I usually wipe off a little dust from the neck to see it.
It may just be dim, but it's working if you have a pic.

Put a voltmeter back there across the two heater pins. You should see a small (~6V) reading.


Another thing- more theoretical: A vector monitor is tracing out a limited number of lines every second. A raster monitor is really modulating the color and intensity of a constantly scanning beam across the screen. Perhaps a slightly cooler heater generates enough electrons to throw at the vector screen while the raster screen needs more and thus a hotter heater.
K

Interesting, thanks.

Next time I have my Battlezone open I'll check for neck glow on it to see if it's a vector vs raster thing.
 
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