Westinghouse K840CK15 Restoration

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The screenshot below is compressed. See full resolution here: https://visions4netjournal.com/wp-co...DF909EA1B.jpeg

UPDATE, SEPTEMBER 5, 2019, DAY 397

From Mike” “Upon receiving and installing the new H.V. rectifier tubes, the High Voltage is now, once again, very stable at all brightness levels. YAY. And I have installed mesh screen where the panel was missing on the side of the cage. I could not get a good image of it due to the meshwork. Not sure why. And, I am still not happy with the contrast levels, especially when operating from DVD. The images with antenna TV are mostly acceptable but the contrast control is always rotated all the way up. I would like to get a bit more video drive out of this set if possible. I have decided to go in to the sealed copper can where the video detector diode is, and replace it.

Pix #1 and pix #2 After removing a copper shield on the bottom of the chassis, and disconnecting 2 wires, some screws and desoldering, the can is removed from the chassis.
Pix #3 The video detector diode from 1954.
Pix #4 The new “all glass” version from 2019.

Pix #5 The can re-soldered, sealed.
Pix #6 and pix #7 Re-soldering to chassis.
Pix #8 Re-solder 2 wires on bottom of chassis.

Pix #9 Resoldering the shield/cover on the bottom of the chassis.
Pix #10 Screen shot

Although I feel very good about replacing the video detector diode, since they can be problematic, only a slight increase in contrast has been gained. I will be taking yet another look at what I might be able to do within the video amplifiers in an effort to squeeze a little more contrast out of the set. The photo of the screenshot show up much better then they really are.”