Westinghouse K840CK15 Restoration

[trinescope]

Originally Posted by etype2

Erich,

Look at post #224 on page 15. The shutters were closed with front facing illumination in mid-afternoon sunny day. The picture is washed out, but gives an idea. It is brighter then I thought it would be and maybe because the light is concentrated on a small screen.

My camera won’t pick up the intensity of green on the Westy.

I saw your video on Facebook. Looking good, congratulations.

I looked at the pictures you referenced and I get the idea. The red on mine will go out of focus if run too bright, but the grayscale will still track normally, so I don't think it's all that bad. I was trying to tweak convergence last night and the horizontal oscillator decided to lose lock and go off frequency, so it's back to troubleshooting for me. It looks like one of the mica capacitors is failing, so I'm just going to replace all the ones in that circuit. The resistors seemed OK, heated them with a soldering iron and they didn't change value much. Swapping out tubes did nothing, so it's not that. Oh well, we saved two more of these early sets.

[etype2]

Originally Posted by trinescope

I looked at the pictures you referenced and I get the idea. The red on mine will go out of focus if run too bright, but the grayscale will still track normally, so I don't think it's all that bad. I was trying to tweak convergence last night and the horizontal oscillator decided to lose lock and go off frequency, so it's back to troubleshooting for me. It looks like one of the mica capacitors is failing, so I'm just going to replace all the ones in that circuit. The resistors seemed OK, heated them with a soldering iron and they didn't change value much. Swapping out tubes did nothing, so it's not that. Oh well, we saved two more of these early sets.

There are thousands of parts in these sets and one can’t replace everything. You hope you address the key failure points and mitigate potential problems ahead of time. I will never use this set as a daily viewer and keenly aware of future failures to come. I should not own this set, because I’m not an engineer, but knowing the history and the nostalgic value was my motive to restore the set. Your set failure is just a minor setback and you have the smarts to fix it.