CRT decay

______________________________ Reply Separator _________________________________ Subject: CRT decay Author: classiccmp(a)u.washington.edu at internet Date: 10/31/98 11:05 PM Are you saying the phosphor is peeling off the inside of the tube, the aquedag peeling off, or is the glass actually deteriorating? I've never seen glass deteriorate and have some television kinescopes (CRT's) which are close to sixty years old and show no sign of decay, including the aquedag and phosphor. Marty I've seen foam turn to dust, rubber turn to goo, batteries turn to acid, but I hadn't expected CRT glass to revert to sand. Sam tells me that he's seen something similar on his Soroc terminal. What process is causing this? Isn't glass basically SiO2? I assume it's crystalizing rather than oxidizing. Anything I can do to prevent it from occurring on other tubes? Any interesting risks associated with firing an electron gun at this crystalized stuff with no remaining phosphor? -- Doug ------ Message Header Follows ------ Received: from lists2.u.washington.edu by smtp.itgonline.com (PostalUnion/SMTP(tm) v2.1.9i(b5) for Windows NT(tm)) id AA-1998Oct31.230501.1767.74354; Sat, 31 Oct 1998 23:05:01 -0500 Received: from host (lists.u.washington.edu [140.142.56.13]) by lists2.u.washington.edu (8.8.4+UW97.07/8.8.4+UW98.06) with SMTP id UAA20225; Sat, 31 Oct 1998 20:02:52 -0800 Received: from mxu2.u.washington.edu (mxu2.u.washington.edu [140.142.32.9]) by lists.u.washington.edu (8.8.4+UW97.07/8.8.4+UW98.06) with ESMTP id UAA23226 for &lt;classiccmp(a)lists.u.washington.edu&gt;du>; Sat, 31 Oct 1998 20:02:48 -0800 Received: from behemoth.host4u.net (behemoth.host4u.net [209.150.128.29]) by mxu2.u.washington.edu (8.9.1+UW98.09/8.9.1+UW98.09) with ESMTP id UAA25 293 for &lt;classiccmp(a)u.washington.edu&gt;du>; Sat, 31 Oct 1998 20:02:48 -0800 Received: from localhost (yowza@localhost) by behemoth.host4u.net (8.8.5/8.8.5) with SMTP id WAA21696 for &lt;classiccmp(a)u.washington.edu&gt;du>; Sat, 31 Oct 1998 22:02:47 -0600 Message-Id: &lt;Pine.LNX.3.95.981031214459.29291I-100000(a)behemoth.host4u.net&gt; Date: Sat, 31 Oct 1998 22:02:44 -0600 (CST) Reply-To: classiccmp(a)u.washington.edu Sender: CLASSICCMP-owner(a)u.washington.edu Precedence: bulk From: Doug Yowza &lt;yowza(a)yowza.com&gt; To: "Discussion re-collecting of classic computers" &lt;classiccmp(a)u.washington.edu&gt; Subject: CRT decay In-Reply-To: <m0zZoMa-000IyMC@p850ug1> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII X-To: Discussion re-collecting of classic computers &lt;classiccmp(a)u.washington.edu&gt; X-Sender: yowza(a)behemoth.host4u.net X-Listprocessor-Version: 8.1 beta -- ListProcessor(tm) by CREN