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Based on the engineers' preliminary comments, the 15GP22's gun structure appears to be the most significant hurdle. It seems that there are no surplus guns as there are for the later 21" tube designs. Making new guns for the tubes appears to be the only way to proceed. Re-gunning a 15GP22 would be more expensive than installing a new surplus gun in a 21FBP22, but the high value ($3,000+) of the CT100 and other 15" sets in working condition would justify the anticipated $500-$600 cost per tube. For the 15GP22 rebuild cost to be about the same as that of having two 21" tubes rebuilt seems reasonable considering that some of the parts will likely need to be custom made for the application. If the rebuilding equipment can be bought at a reasonable cost, is relatively compact and supports the 50mm neck diameter of early color tubes (both 15" and 21"), then it may be a good idea for one of us to purchase it. What is its item number? I'd like to see its listing and evaluate whether or not setup at my location is feasible. I assume it requires electric power for the vacuum pump and sealing device among other functions. If the power requirements and physical size are comparable to a large household appliance (refrigerator or washer) then I might buy it. If it's the size of a car and/or requires 3-phase or 480-volt power, then I would not be able to set it up here.
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