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Vintage Computers Any vintage computer systems, calculators, video games etc., but with an emphasis on 1980s and earlier equipment. |
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19th Apr 2019, 7:35 am | #1 |
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Join Date: Oct 2016
Location: Maroochydore, Queensland, Australia.
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Vintage amber VDU project
Recently I built two vintage NOS Zenith amber CRT VDU's into special order Takachi enclosures. One thing was a successful CRT gasket/mask that was machined out of 10mm thick black acrylic. Using thicker acrylic this could also be a method to recreate masks for vintage CRT's too.
The article/story is here: http://worldphaco.com/uploads/THE_AM...DU_PROJECT.pdf |
19th Apr 2019, 8:24 am | #2 |
Octode
Join Date: Mar 2015
Location: Yorkshire, England.
Posts: 1,303
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Re: Vintage amber VDU project
That's a very professional looking job, congratulations!
How did you arrive at the 700 mm radius of curvature of the crt?
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Regards, Ken. BVWS member |
19th Apr 2019, 8:40 am | #3 |
Dekatron
Join Date: May 2003
Location: Edinburgh, UK.
Posts: 3,274
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Re: Vintage amber VDU project
As Ken has said, a truly professional job! Beautifully executed.
Peter |
19th Apr 2019, 12:14 pm | #4 |
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Join Date: Oct 2016
Location: Maroochydore, Queensland, Australia.
Posts: 2,679
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Re: Vintage amber VDU project
I used a long string with a pen and drew curves on thin card, then cut them out and held them to the crt faceplate, in the end, through iteration, I found the radius of the faceplate.
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19th Apr 2019, 1:35 pm | #5 |
Rest in Peace
Join Date: Jul 2011
Location: Bridgnorth, Shropshire, UK.
Posts: 787
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Re: Vintage amber VDU project
That is REALLY nice!
Mounting 5.5" CRTs has been a real bugbear. Sometimes I use the metalwork that comes with the TV. Other times I form a large hose clip into a kind of rim band. Your solution is better by far. I like the SOL 20 too: perhaps the only desktop computer with an S100 bus card cage...? |
19th Apr 2019, 2:00 pm | #6 | |
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Location: Maroochydore, Queensland, Australia.
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Re: Vintage amber VDU project
Quote:
It is not ideal for cooling as the heat builds up between the S-100 boards. On my Sol-20 I added an extra fan to combat this. In my computer I run three 16k ram cards so I can run 48k CP/M and the heat between the cards is an issue. Also these cards have issues with their digital delay lines. Here is an article about the cards, if you go to page 24 you will see the cooling fan I added: http://worldphaco.com/uploads/PROCES...A_RAM_CARD.pdf Last edited by Argus25; 19th Apr 2019 at 2:09 pm. |
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21st Apr 2019, 2:23 am | #7 |
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Join Date: Oct 2016
Location: Maroochydore, Queensland, Australia.
Posts: 2,679
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Re: Vintage amber VDU project
I just made a very short video of my Walking Man on the Amber monitor. This program was written in 8080 assembly language and uses plots of the $ symbol, since the Sol has no graphics screens, just text:
https://youtu.be/D8PEJsoEWUc |
21st Apr 2019, 8:28 am | #8 |
Octode
Join Date: Mar 2015
Location: Yorkshire, England.
Posts: 1,303
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Re: Vintage amber VDU project
That does look good. I'm sure I've seen something similar on a European pedestrian crossing, possibly in Spain.
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Regards, Ken. BVWS member |