UPDATE, SEPTEMBER 7, 2019, DAY 399
From Mike: “We have contrast! I changed the cathode resistor in the first stage of video (12BY7). Factory specs calls for 56 ohm. I tried different values downward in ohms and I arrived at 39 ohms which is roughly half the original value. The contrast improved by about 20 % and it did not affect the high frequency response of the amplifier. I am real happy with this improvement. This essentially increases the current going through the tube. Not to worry, we are still way within the specs of the tube, and the contrast control is no longer all the way to its maximum position. We now have “room to spare”.
Pix #1 Oz 1
Pix #2 Oz 2
Enjoy!
I think we are now in the “cooking stage”.
Mike”
Author: Mike nailed it! Much improved from the previous screenshot. The colors are well balanced. Color, gray scale, geometry, focus and convergence are very good in this viewers opinion. I think this will be the last update for now, unless something comes up. We have to be concerned in transporting the monster chassis’s and CRT. Mike has to travel 12 miles on a dirt road from his ranch. SLOW is the key word. Can’t wait for this set to arrive home to me. Our restored cabinet is waiting.
Link to high resolution images:
https://visions4netjournal.com/westi...r-tv-part-two/
