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Wow! Remember this one? Well, there is news-we have a square raster! I bought still another yoke, and this time was finally rewarded with a nice, full screen! This has allowed me to find still more bonehead repairs on this thing, most shamefully the video detector diode was backwards, once that was swapped, I now get a very nice picture! Now for the current problems:
The picture STILL blooms if the brightness is adjusted at all: Turning up brightness really screws up the picture size, as well as creating as 'black hole' type of blooming in the center of the picture. Contrast adjustment is also finicky-throwing off vertical and horizontal holds.
Speaking of which, the vert and horizontal holds are really touchy-and they interact with eachother a lot. It is nearly impossible to get a stable picture for more than a few seconds. Working with the Horizontal drive and oscillator adjustments helped a little, as well as fooling with the vert lin and size.
Just wanted to give some update on this set-I haven't given up yet! If anyone has any suggestions, of course feel free to toss them out. I have one question though-the horizontal section uses two 'ladyfinger modules'-larger versions of couplates where about a dozen components are in a single unit. Are these fairly stable components? Or should they be held suspect as well? Sorry no pics, but I can't get a steady enough picture to run to the front of the set to snag one!
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