CRT TV High Rez Video Mods you've never seen before! - S-video & RGB MUX

For more information on repairs, diagnostics and to connect with me, please visit: / retrotechusa
Today we are repairing, restoring and modding three CRT TVs from the 1990s.
JVC AV-20321
Sony KV 20S21
Sony KV 20S40
RGB Mux and S-video mod guides:
JVC AV 20321 RGB Guide: sector.sunthar...
Sony KV 20S21 S-video Guide: crtdatabase.co...
Sony KV 20S40 RGB Mux Guide: sector.sunthar...
Testing Software (240P Test Suite): junkerhq.net/x...
0:00 - The CRT TV's Intro
1:30 - The JVC AV-20321
9:57 - What is an RGB MUX mod?
20:40 - The Sony KV 20S21
45:04 - The dog goes crazy
47:50 -The Sony KV 20S40 Ultimate RGB Mux guide
#crt #retrotech #retro

[@silva_579]

That white jvc is 👌

[@RetroTechUSA]

It's nice one

[@TheSimTetuChannel]

I finally did the MUX RGB mod on my Toshiba 27AFX54 and used the RGB-PI Scart cable adapter to a Raspberry Pi 4b with RGB-PI OS4.... it's Arcade Heaven!!!

[@standley_steamers]

Thank you Stevie for another great video

[@RetroTechUSA]

@@standley_steamers thank you!

[@Zionfarm]

Looking good Steve.

[@RetroTechUSA]

Thanks @Zionfarm

[@brianharmon9405]

High rez mods? Sounds awesome

[@Zionfarm]

The black dog at the end looked so sad 😂🤣🥹

[@TheSimTetuChannel]

Oh, I forgot...With the amount of scart holes you dremel out, instead of using a pencil have you thought of bending a 1/32 steel strip to the contour of a scart connector to make a template that you could heat up and mark the plastic with everytime?
Then you just need to follow the groove with the dremel.

[@njlwag]

Would you ever make a video on a HD CRT? I just picked one up and have attempted working on it but it's pretty daunting. The service menu alone is a lot haha.

[@TheJoushua]

Hello brother, I am Ganesh your biggest fan from all the way in the Caribbean, Trinidad and Tobago. I fell in love with CRT technology because of you. But I want your email to show you something. There is something remarkable I have discovered and I can't really understand what kind of electronic wizardry is happening. I have a 27" Phillips CRT Tv, after tweaking with the tv and trying all kind of explorative stuff playing retro games.
I use a HDMI to composite converter, I run my computer to the tv. The thing is I connect the video composite cable to the component Y input on the tv, and voila I can see genuine Component on Black and White.
I understand there is a conversion going on where the converter is allowing the HDMI resolution to be downscaled to NTSC 480i resolution.
But, when you look at that image quality in black and white component on a Philips SD CRT, this tv is producing one of the sharpest image I have ever seen in my life. I am blown away.
I have read that black and white has higher contrast ratio than color. So I know that sharp image has something to do with the way black and white imagery is shown and processed by the human eye.
But, I set my computer on AMD andrenaline software to native black and white to properly synchronize. There was a bit of dot crawl, but when you take all the color saturation to 0 on black and white it shows perfectly sharp with zero dot crawl.
The thing is I am telling you bro, you need to try this and tell me what you think. connect your computer to a Phillips SD CRT with HDMI to component converter, make the native saturation to black and white.
Play a 4K video. One of those 4k Cyberpunk 2077 videos on TH-cam. And tell me that is not the most impressive image you have ever seen in your life.
My question what is allowing this to happen?

[@Elwarez1994]

The Green or "Y" component input means Luma or luminescence so you get a sharp black and white image

[@TheJoushua]

Hellooo

[@Ocelot35]

Why's it called R308? Why not call it Bert? No logic.