Quote:
Originally Posted by jhalphen
Here's a similar endeavour by two French guys, Frederic A. & Pierre G. on their web site.
A Miniature 2" CRT Monitor using a Scope tube (Green phosphor).
- All tube design
- Every important section (Scanning, Video Amplication, Sync, Power supply) is studied in fine detail with an analysis of the Pro's & Con's of each design. The study is divided into 19 chapters for each sub-assembly.
- Loads of Scope photos, construction snapshots, voltage/current measurements.
http://www.cfp-radio.com/ |
This is amazing and very close to what I am looking for! Thanks!
My goal is to design something that will work with late 1990s era 90-degree deflection fine dot pitch color CRTs around 13-inch in size, such as the M34AFA13X02. There are plenty NOS CRTs from that era out there, especially from places such as
https://www.relltubes.com/ My understanding is that the yoke designs starting in around the 1990s for "bubble curved" screen, 90-degree deflection CRTs (like the M34AFA13X02 ) are wound in a way that automatically corrects for pincushion distortion. So that will make the circuit design more simplistic. However, these yokes use parallel windings and a much lower series inductance than the yokes described in the 1950s thru 1970s television theory textbooks that I have access too. Grob mentions parallel yoke windings in his 1970s edition of his textbook, but it sounded like a new technology at the time and so he didn't go into any detail other than mentioning it.
That French project used a much smaller deflection degree than 90 degrees. It is also not clear from a brief viewing what type of deflection yoke is being used, and it may be deflection plates?
Quote:
Originally Posted by maxhifi
Start by digesting everything tv related you can find ih RCA Review, Electronics, Radio and TV News, etc. You can find much info at www.worldradiohistory.com, but it will be basic research - no spoon feeding here. |
This is what I am currently doing. The guy that runs that website is providing an incredibly valuable service to the world. I hope to help slow the fading of this technology into distant history by reading and digesting as much as I can from that site... and hopefully creating a cookbook DIY TV project to give back.
Next on my list after Grob's "Basic Television" is read Zworykin's "Television" 2nd edition. Zworykin literally invented television, and founded RCA's television division. I've paged through the PDF copy of his book that is available on
www.worldradiohistory.com. I see he has an explanation of many formulas for electromagnetic deflection. Zworykin is a once-in-a-hundred-years caliber person, and his 1000 page "bible" is intimidating. Hopefully it has enough details for what I am after.