UPDATE, AUGUST 10, 2019, DAY 371
Hi Marshall. I am sending these pictures but I must say the images look a lot better than the pictures show. Not sure what’s going on with the images from the crt. Other images are fine. The focus is actually much better than the images show, and really not so grainy. Anyway, here goes. Also, I decided to install a fan on the power supply which is a fair distance from any magnetic interference for the crt. The 50 watt resistor heats things up a bit but it is necessary. The gain here is that we are not lighting up qty 2 5U4’s any more which is a big load taken away from the power transformer. (filaments)
Pix #1 Temporary hookup of the crt wires during the installation of the 15GP22 tube.
Pix #2 The hookup cleaned up properly with shrink wrap and proper color codes on the wiring.
Pix #3 The power supply chassis showing the newly installed silicon rectifiers which I implemented into old 5U4 sockets from dead 5U4 tubes. And the newly installed 300 ohm 50 watt resistor and fan.
Pix #4 The final circuit that worked well for the convergence pot new design.
Pix #5,6,7 Images from antenna tv over the air that are actually better than the images show.
Author: First impression, the images look brighter than expected. Picture #5 and #8 show diagonal banding artifacts from the camera. We also have a purity issue seen in the lower left hand portion of the screen on #5. Diagonal banding occurs when the camera is held in the portrait mode. Picture #6 shows a horizontal banding artifact in the lower half of the image, distorting the color. Sometimes the artifacts can be removed by adjusting the camera settings. Picture #7 looks to blue. These images came from less than an ideal source. Mike only wanted to show what we have achieved thus far. I agree with Mike that the images look out of focus and grainy. Mike has not adjusted the purity as yet and will continue working on the convergence. We have a way to go.
This did not fit in the last email. It is pix #8 I believe.
Onward to improve the convergence a bit. But we are getting close. The picture is very stable and no more arcing so far.
Regards, Mike
Author: I want to thank Steve McVoy for the 21 pin socket, John Folsom for the VCT and Dave Abramson for the spare convergence magnet. I strongly suggest viewers open this link to see full resolution images in the carousel.
https://visions4netjournal.com/westi...-carousel-9954
