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Progress update. Had a weird and uncommon failure in the 3.58 osc section, the xtal tuning coil literally shorted out. The little dab of wax used to hold the wires across the coil form dissolved the enamel and shorted the windings killing the color and giving me a good week of headaches chasing this one down. At first it was lost color sync then a fade to gray, it acted like the color killer was coming on so that's where I focused until I looked at pin-7 of the 6HS5 and found chroma and the osc, when I bumped the tuning coil the color flashed and that's when I looked closer and found the wax flaking with some green enamel missing.
My fix was using some fine wire from a small audio transformer and winding a new coil, once I had it on frequency it was dabbed with a touch of Testors model adhesive. Not a common repair for sure but my odds of finding another coil is around zero.
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09-21-2024, 01:38 AM
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