Ransom, on Sun Feb 26, 2012 10:18 AM, said:
Wow, that looks really great now!
This is it reassembled and working with a VBXE 1200XL:
The RGB wasn't working when I dismantled it and I was all ready with the soldering iron... but it somehow righted itself. Tube is super-sharp on this one, and colours extremely vibrant. It also gives the best Y/C picture of any CRT I own. All it required was a slight pincushion adjustment using a pot on the board.
One thing I have trouble understanding is how to get it all to come out evenly. Does everyone use five or six light sources at once, so that every side is bathed in light? Or do you do one side at a time? And what about the crevices? It seems that if light is a critical component of the process, it would be very difficult to get it to come out even, unless you do it a single surface at a time. But that seems far too time-consuming, particularly with items that are shaped like that monitor, with its control panel area.
It's not easy to get an even result, but this is usually because the discolouration tends not to occur evenly in the first place. If you look at this monitor in certain lights, you'll see that there's a trace of streaking on the front (where it was most severely discoloured), but I decided to call it a day when the chance of blooming, etc, outweighed the likelihood of further improvements. Indeed the objective, in a case like this, is not necessarily to achieve the original colour, but to achieve an even
Regarding light sources, naturally with a monitor, the bezel is easiest to position on a windowsill for exposure to the sun. In this case, the bezel also needed the most work. The back cover was in better shape, so I was content to coat it with perioxide and leave it on the bench not far from the window, where it could catch ambient light. It was thereafter a case of washing and recoating, gradually confining activity to the most stubborn areas, and repositioning parts near to the light source as appropriate. I'm becoming more partial to ambient light when Retr0Briting. I think the reaction is most balanced when the light source isn't too searingly intense. A slow reaction tends to produce better results than a fast one, especially when discolouration was severe. I'm never putting OXY into the mixture again (since the last job I tried it with bloomed badly).
This monitor was done with pure 40 vol creme peroxide, and took a total of around eight hours in weak daylight.
Edited by flashjazzcat, Sun Feb 26, 2012 11:49 AM.