Restoring a RCA 21CT55

[etype2]

Good information flowing ...

Just read a 1954 paper by RCA last night. This particular tubes shadow mask, 21AXP22 blocks 85% of the electrons. This same figure was presented to the IEEE in a paper entitled “THE PDF CHROMATRON-A SINGLE OR MULTI-GUN TRI-COLOR CATHODE-RAY TUBE by Robert Dressler from the PROCEEDINGS OF THE I.R.E. VOL.41, NO. 7, JULY, 1953”, priniple engineer at Chromatic Television Laboratories’s Inc., developers of the Chromatron tube. The slot mask was an effort by American manufactures to increase the electron flow to the phosphors.

Like I said previously, I’m taking everything said seriously. We will curtail running the 21AXP22 until I have a chance to sort all of this out with Mike. He is about to have a second surgery and don’t want to bother him.

Any comments about the latest screenshots after the slug was adjusted?

[benman94]

Originally Posted by etype2

Just read a 1954 paper by RCA last night. This particular tubes shadow mask, 21AXP22 blocks 85% of the electrons. This same figure was presented to the IEEE....

And this is exactly what I referred to in my last post. This is yet another reason why you run the jug at 25 kV...

As far as the screenshots go, I can tell, especially in comparison to the CTC-7, that the image is on the dim side. Otherwise they look alright.

[etype2]

See the slideshow at the bottom of this link page.

https://visions4netjournal.com/vinta...tv-page-two-2/