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CRT Video Projectors: amazing, but fiddly, tech
🕑 Added 2025-10-06 23:19:03 +0000 UTCHelloooo!
UPDATE: YouTube link replaced with new version where a lowpass filter was added to remove the CRT whine from 7:06 to 9:04. I'd appreciate your feedback to see if it's effective - I cannot hear anything in the recording which either means the day has finally come for me or... I think since the TV was generating its own raster without a signal it was a slightly higher frequency that just managed to escaped what I can hear. I turned on one of my little Sony CRTs and I can still hear the whine in person. Am I writing all of this in the vain attempt to deny the fact that I'm aging? Surely not.
Anyway, so for the second main channel video where I promote the socks, I decided to make a video on the CRT projector I picked up a while ago. And I dusted off some of the old tricks I used to use for putting my face on another screen.
Here's the YT version:
https://youtu.be/ms8uu0zeU88
The TV that I was restoring also made an appearance - a couple of the mica capacitors in the horizontal oscillator circuit ended up being leaky and after replacing those it came to life. I figured it would be fun to show an actual all-tube TV design when talking about the early history.
Okeydoke, well I'm gonna try to get the captions finished up tonight for everybody. But I hope you enjoy it!
Comments
Marcin Szymczak
Loved that video! But I'm returning to this one not because I'm so delayed, but I was thinking today: huh, I wonder if Alex is planning anything about vector graphics computer (or a console) 🧐 🤩
MrHammond
When I started studying at university by the end of the 1990s, they still had these in the lecture rooms, although there was already a portable one around for use in smaller rooms. Still quite expensive back then! Now I got a professional Christie from work, they were selling them for about 100 bucks a piece to employees after they switched all conference rooms to big LCD screens.
Jason Poggioli
If you misaligned the red/blue tubes a little and looked at the image through old red/blue 3D glasses - what would you see?
