> On Mar 1, 2020, at 9:02 PM, Toby Thain <[email protected]> wrote: > > Exactly the same happened with Monoscope CRTs that I purchased on ebay. > The original foam in the Raytheon box had turned into dust, but before > that, had acidically corroded the pins and label on the tube.
A lot of polyurethane foam decades past has completely disintegrated. One famous example is the analog synthesizer that Radio Shack sold, the MG-1. All of the foam behind the front panel, put there to keep dust out of the linear pots, turned to tar years ago. Fortunately, that synth is so popular that replacement pot and switch kits were made available. It's a bitch to clean up but at least it does. > Can still probably be restored, but it's ugly! At least the foam surrounds on loudspeakers can be replaced. Terry Bowman, KA4HJH "The Mac Doctor" "I've seen things you people wouldn't believe: attack ships on fire off the shoulder of Orion... beams...in the dark in the Tannhauser Gate. All those moments will be lost in time...like tears in the rain." — Roy Batty, Blade Runner -- You received this message because you are subscribed to the Google Groups "neonixie-l" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web, visit https://groups.google.com/d/msgid/neonixie-l/76E97B34-F411-44CD-A4AC-5D889514F0EA%40gmail.com.
