Nifty Find - HP2644A

From: Joe <rigdonj_at_cfl.rr.com>
Date: Mon Sep 16 11:50:20 2002

At 08:50 PM 9/13/02 -0700, you wrote:

>
>I'm a little nervous about screwdrivers or putty
>knives and glass under vacuum. I wonder if a HEATED
>wire would cut through this. Also, I've found that
>acetone goes through just about anything not metal or
>glass eventually.
>
>If you've ever seen the people who replace car
>windshields at work (on pre-1990's cars, anyway), they
>heat a very thin wire with a blowtorch and use this to
>cut the sealant.

   I was going to suggest using a thin wire as you described. I've done that to remove car windshields from the rubbery putty that they're mounted in. I used .030" stainless steel safety wire. Tie each end to a wooden handle (section of broom handle) and use a back and forth sawing motion to cut through the glue. If you want to heat it, connect each end to some kind of power supply (a car battery with a big variable resistor might work ok). I used a variac to heat a LONG piece of safety wire to cut through a big piece styrofoam to make a 6+ foot wing for a large model airplane once. But be carefull about variacs, remember that thier output is still connected directly to the AC line!




 It might be hard to find this thin,
>strong wire, though. Thin wire, easy. Strong wire,
>easy. Thin, strong wire...
>
>
>> End result- cleaned 'em up and got a perfectly
>> useable CRT and separate
>> 'anti glare' glass.
>> I reassembled them with an air gap and 'goo' in the
>> screen corners only-
>
>I might use clear RTV or something similar, if I am
>successful.

    They do make an optical grade of RTC. You might be able to call Dow Corning and get a sample from them. FWIW I spent yesterday afternoon carving the optical sensors that had been potted up n this stuff. Soaking in acetone helps soften it up.


     Joe
Received on Mon Sep 16 2002 - 11:50:20 BST