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#17
09-28-2010, 07:35 PM
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Well, I'm at a standstill with this set. I actually brought it up today and it has raster and a very bright CRT. My problem is the yoke housing has disintegrated, and the centering rings are dangling loose on the neck (see pic 4 in the first post of this thread.) The Sams states that all the replacement yokes I could locate should use the "original rear cover and centering device."
 The Triad Y-43 & NW2 simply state "connect same as original," but no luck finding those. So...how feasible is it to make a new cover for the yoke? Has anyone done this before?
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AUdubon5425 Youtube Channel 
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#18
09-28-2010, 08:32 PM
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I saw one get fashioed for an old NEC 60"s B/W - the shop used the top of one of those collapsible water bottles - they just cut off the top inch or so of the bottle. The CRT neck fit loosely through the opening at the top, and the rest of the top was slightly oversized. They used cement (Duco) to hold it, but it got the RTV treatment to secure the rings around the screw threads at the top.
Dunno it that would work, or where you could find a collapsible water bottle these days.... Cheers,
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Brian USN RET 22YRS (Avionics/Cal) CET-Consumer Repair and Avionics ('88) "Capacitor Cosmetologist since '79" When fuses go to work, they quit! Last edited by Findm-Keepm; 09-29-2017 at 06:39 PM.
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#19
09-28-2010, 09:40 PM
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I had the same problem with my Zenith. The plastic had deteriorated and made an ungodly mess. Probably not the best choice of materials, but I'm pretty good with card-stock and a pair of scissors so I formed a cover from that and assembled it with a mess of electrical tape. The neck doesn't seem to get all that hot around the yoke, not as much as it does near the filament. It has held up fine so far, but I'd like to improve on it by coating it in something firm and heat-resistant and seal it up with some kind of glue instead of the tape holding it together. I just needed something to support my centering rings, and I hope to later improve on this design with better materials.
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#20
09-28-2010, 10:49 PM
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Quote:
 http://www.videokarma.org/showthread.php?t=203537
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Charlie Trahan He who dies with the most toys still dies.
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#21
09-28-2010, 11:55 PM
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I would highly recommend the technique Charlie posted above. It hadn't occurred to me to use styrene, but it would really work nicely. It's a shame that I couldn't get the attached photo's from that thread to come up. I would love to see how it turned out! I'll keep my card-stock version in place until I get some styrene sheets to work with, and then I could dissect my older version as a template.
If nothing else, you could tuck something in there to hold your centering rings in place around the neck of the tube just for functionality. Covering the yoke doesn't do much but keep the dust out, but the rings actually affect the alignment of the beam. That was the sole reason I had to throw together my little concoction.
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#22
09-29-2010, 02:23 AM
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Thanks for the tips guys. I too sure wish the pictures of the styrene were still there.
I may use cardstock first just to get the rings in place so I can poke around it some more.
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AUdubon5425 Youtube Channel
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