The DC CT100

[N2IXK]

Originally Posted by Zenith6S321

Here is a picture of two of the getters and the purple ionized gas shown in the small circle. The getters did their job and they are all used up.

This CRT probably has way too much air, but have people been able to re-flash the getters for a little more life? Or are the cathodes just too poisoned by the time the getters show wear?

I'm gonna need to watch more bandersentv cabinet refinishing videos before I attempt this cabinet restoration.

Under the chassis it all looks original, white peaking coils included. The HV cage also looks untouched. The tuner seems to be missing its cover though.

Dave

Tube definitely looks like it has transformed into a 3-gun thyratron.

I have access to a small induction heater, and have tried reflashing getters on gassy tubes in the past (but never on a CRT). Heating the getter loop up is easy, but I haven't managed to get any visible deposit or any improvement in gas content. I suspect that the initial flashing evaporates substantially ALL of the barium content, and reheating the getter is pretty pointless after that.

Once the getters look that bad, there is far more gas in the tube than even a full new getter would be able to handle anyway, much less whatever remnants you could hope to liberate by reflashing the old tabs.