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The PVA could not withstand the heat of the rebuilding, so had to be removed.
The question would be, did they rebond the safety glass with PVA? RCA obviously did, but how about the small shops?
When I got my rebuilt 21FBP22 from Scotty, it did not have the safety glass re-applied. Doug Harland helped me salvage the glass from a dud and then tape it on the good tube, as is the usual practice for collectors.
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Old TV literature, New York World's Fair, and other miscellany
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