ctc-4 safety glass

[Tom Albrecht]

On my CT-100 (looks like similar type of mask and safety glass as your set) I found that with the mask out of the set on the bench, it actually took only a little heat (no where near glass cracking risk territory) to get things apart. I don't recall what I used to pry it apart, but prying with a putty knife would be safer than using a screwdriver blade to get things apart. Not much force needed. I got the black stuff off the mask by scraping with a razor blade, using paint thinner as a lubricant/solvent. Here you have to be careful not to damage any paint on the mask. Some of the other ideas noted above may be gentler on the mask than the razor blade method I used. Not sure if yours has any paint on the mask, however -- I don't really see anything like that in your picture. If it's just uncoated plastic, you simply have to be careful not to scratch it when removing the black stuff.

I don't think you'll break the safety glass, but if that were to happen, safety glass is readily available at most glass shops. It is used for shower doors and the like. On my RCA 621TS, the safety glass was broken (happened in an earthquake with a prior owner) and I was easily able to get replacement safety glass at a glass shop. Safety glass is a laminate of two sheets of glass with a layer of plastic in between that holds the broken pieces together if it cracks.

[Steve D.]

Hopefully you follow the well documented procedure for removing the CRT.
Cabinet face down, having a padded surface preset to place the CRT on when removed ect. The 21AXp22 has that metal flange that provides a good place to grip the tube when lifting out of the cabinet. Also marking the position of neck components before removing them. Perhaps taking photos of all the components and mounting hardware prior to removing the tube. Be sure to double check that all electrical connections are disconnected before removing chassis & CRT. And, of course, eyewear protection and perhaps gloves.
SAMS has the basic instructions, usually on the last page.

Take your time,
-Steve D.

[DaveWM]

just be aware of the fact that the glass neck parts are bonded to the crt bell and would be subject to a lot of stress if force was applied to the neck, You want to make sure you only grab the CRT by the metal bell, hands off the neck.

I do not know how strong that glass/metal bond is, but its a much smaller diameter where it attaches so all the force from the neck is going to a smaller bond area.

that being said it was not a big deal on my CTC-5 to remove the CRT (a 21AXP22). Just take pics, note how he anode lead is attached and routed, and how the rubber seals are attached.

Be careful not to overtighten anything when putting back together, you do not want to crack the plastic bell covering.

[bgk283]

Thanks for the input guys. I thought I would be real careful and try to apply alittle heat first, I did it evenly around the edges and with a small hook tool, worked my way around the edges and it pretty much peeled right off, the real miracle here is that I had a blow dryer in the house, going to be 50 next month and my need for one is long past...