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UPDATE, SEPTEMBER 17, 2019, DAY 409
Hi Marshall. I have been “cooking” the chassis almost every night for about an hour and a half intervals. So far, no more arcing and the stability is good. Warmup for a good picture is about 15 minutes which is mostly for the crt to stabilize. But it starts up well, with color, sound and stable picture. I have done everything that “can” be done for this set and I am certain that it is working as well as it possibly can. During high brightness levels there is some “shadowed” streaking that appears and this is due to the “old” crt which has lost “cutoff” characteristics from age. It is a bit on the weak side, as I stated in the beginning. I am surprised that it works as well as it does considering the emission measurements of the guns. Most of the time, the shadowed streaking is not there. You have seen some images and I think you will be happy with the performance considering the age and technology of the set. Cheers!
My plan at this time is to deliver the chassis on September 30th which is a Monday. Let me know if this works for you. I will be mounting the chassis to a piece of plywood and installing lifting handles of some sort to make it easy and safe for 2 people to carry. I have here, the other knobs, the back cover, NEW chassis bolts! and a big box of old parts to bring with me. Of course I will be bringing the usual tools and equipment that I always bring to a “service call”.
I have enjoyed this “long march” and I’m sure that you know, I have given this my “best shot”
Special thanks to Dave for the crt gun magnets, Bob Gallanter, and John Folsom for their input, advice, parts availability and ideas during this restoration process. Please include Steve McVoy for the crt socket that the ETF donated to the cause.
LONG MAY SHE RUN!
Mike
Author: Although I haven’t seen the performance of the set personally, seeing the two screenshots of Oz, especially the facial shot, Mike you have exceeded my expectations. I never thought a 66 year old 15GP22, not to mention one with lower emissions could be capable of an image like that. It’s all due to your expertise, alignment skills and careful controlled step by step diagnostic procedures. I’m anxiously awaiting your delivery and final setup. I should mention that your restoration of my 21CT55 is still holding up well after nearly three years.
Marshall
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