Westinghouse K840CK15 Restoration

[old_tv_nut]

Originally Posted by Dave A

I was looking to see what the set did with dark tones and it did a great job. Not inspiring for sure compared to the others but it did answer my question. It can handle subtle dark tones. A great thread.

Yes, it definitely did well.

[etype2]

Originally Posted by dtvmcdonald

Is that set capable of producing a real green? My CT-100 sure was. For tests
of green I like live golf.

OR bright, saturated, magenta?

The acid test of any color TV is to get a bunch of stills, often of flowers, as well as less saturated ones. Then copy those to a USB key or Blu-ray disc, and play them
on a blu-ray player. Take shots of the color TV. Then open up Photoshop and load up each original and the TV shot at the same time. Run the color TV at the same time too, with the same shot. Then adjust the photo that you took of the TV screen on your monitor so that it exactly matches the actual color TV screen color. Then save that modified file.

You then post both the original slide that you played, and the retuned file off your computer. This means that when a viewer looks at both at once on the computer, the DIFFERENCE will be EXACTLY what it was in reality. In other words, doing this compensates for differences in rendition on the web viewer's monitor.

I did this for my CT-100. The file pairs are posted here in an old thread.

I refer you to post 287 and 299. Color bars and forest background.

In an early post, I noticed my camera was not processing green as I saw it on the 15GP22 and close on the 3 inch LCD screen of the camera. I watched the shot of the crying watchman (Oz) being processed on the LCD screen of the camera and when completed, weak green. I noticed my iPhone X seems to process the greens better in the movie I posted but suffers from a shutter bar that scrolls the screen from bottom to top which changes the colors of shot. That effect is definitely not there when viewing the 15GP22 directly. I wanted to shoot the movie on my camera but unable to download hi density file from camera to iPad.

I no longer use a desktop and no Photoshop. I do have third party editors.

[ceebee23]

One thing to remember with Kiss me Kate is that it was filmed in 3D using the ye olde worlde twin camera setup ... not sure of the originating film stock ... prints were ANSCO I believe... and of course lit to handle the 1/2 stop light loss because of the polarising filters.

Note the twin cameras... what a nightmare that must have been ... and of course most 3D movies were also shot with 2 or 3 track stereo sound.

[etype2]

UPDATE, OCTOBER 25, 2019
We were successful shooting a better quality movie with my Sony A6300 camera. The title, “Restoring a 1954 Westinghouse H840CK15 The World’s *First Color Television”. It’s in MP4 format, 60fps. 37mm, 1/25 sec., F20. This video eliminates the annoying shutter bar which discolored the images previously. We are getting better greens and we eliminated overexposure. We also added additional content from the 1939, Wizard Of Oz, three strip Technicolor film. Near the end of the movie, you can see multiple shades of green, a teardrop from Dorothy and you can hear my Golden/Irish drink water at 9:45 into the video. Note to self: Clean lens prior to shooting.
��

https://videos.files.wordpress.com/Y...mg_3323_hd.mp4

Edit: The Westy looks brighter than the video.

[ohohyodafarted]

It really looks great Marshal. Incredible quality video. Taking a video of a tv screen is never easy, your capture of the Westy playing is fantastic!

[old_tv_nut]

You definitely cured the shutter-bar problem. Nice.

[electronjohn]

Marvelous job on the restoration AND the video! Just fantastic.

[colorfixer]

Originally Posted by trinescope

Not sure who made these tubes besides RCA. Mine is also 4 13 date code.

Here is the best I could do with a phone camera to get a picture of the phosphor dots; the holes I mentioned show up mostly on the blue and red here.

Notice that the red dots are slightly larger than the green and blue? Remember that the red phosphor at the time was less efficient than those used for green and blue. It's known that the red gun was run harder to compensate for this, perhaps they also made the dots slightly larger to help as well?

[old_tv_nut]

Originally Posted by colorfixer

Notice that the red dots are slightly larger than the green and blue? Remember that the red phosphor at the time was less efficient than those used for green and blue. It's known that the red gun was run harder to compensate for this, perhaps they also made the dots slightly larger to help as well?

In these tubes, like all the early tubes, the size of the excited area was limited by the size of the holes in shadow mask ("positive guard band"). What you suggest could not be done until black matrix, negative guard band tubes were developed, in which the mask holes are larger than the visible area of the phosphor dots; and then it was not done, as far as I know.

[etype2]

Thank you for the nice comments. If Mike is reading this, he should chime in. :-)

[etype2]

iPad homepage screenshot from Westinghouse H840CK15 and 15GP22. Original resolution 4000 X 6000. Pinched out to fit portrait mode.

Edit: Pinched out (enlarged)

[Electronic M]

Wow, with how Apple touts the screen resolution of their iPads I figured you wouldn't be able to to see the dot pitch of the seceen like a protacolor.

[etype2]

Originally Posted by Electronic M

Wow, with how Apple touts the screen resolution of their iPads I figured you wouldn't be able to to see the dot pitch of the seceen like a protacolor.

In case you were not joking, you are looking at the enlarged pixel structure of the 15GP22 not the retina iPad display. I posted this to show the pixel structure of the 15GP22.

Original compressed 1668 vs. 4000 shot. Edit: VK lowers the resolution of these shots. My originals show more detail.

[etype2]

Just for fun, screenshots from my 1966 Portacolor.

[Electronic M]

Originally Posted by etype2

In case you were not joking, you are looking at the enlarged pixel structure of the 15GP22 not the retina iPad display. I posted this to show the pixel structure of the 15GP22.

Original compressed 1668 vs. 4000 shot. Edit: VK lowers the resolution of these shots. My originals show more detail.

95% of my sentences that end with this guy are intended to be jokes.