Admiral 24A12 restoration

[charokeeroad]

Watched all eight videos on the restoration of this set. I learned a lot but still don't feel ready to do a restoration yet. For the time being I'm just collecting as many interesting sets as I have room for.

[Kevin Kuehn]

Viry nice work, I wish I had half your ambition.

It looks like those chroma dots are not really visible from a normal viewing distance? That set now has an incredibly sharp picture. Maybe you've gone and done "too good" of an alignment. In other words you could mess it up a little.

Kevin

[wa2ise]

Originally Posted by bandersen

There's just one problem. Now, I'm seeing what i believe are called 'chroma dots'. I recall reading a tip about using the green component output of a DVD player fed into an RF modulator. I tried that and it definitely did the trick.

Does anyone know any other tricks to reduce or eliminate them ?

I modified my Channel master CM7000 box to only feed the luma and not chroma to its RF modulator.


This box uses a special group delay filter on the video signal to condition it for TV set reception, just like real TV stations did back in the old analog NTSC days. Si it should produce really good pictures on your set, it does on mine.

[bandersen]

Originally Posted by Kevin Kuehn

Viry nice work, I wish I had half your ambition.

It looks like those chroma dots are not really visible from a normal viewing distance? That set now has an incredibly sharp picture. Maybe you've gone and done "too good" of an alignment. In other words you could mess it up a little.

Kevin

Thanks. No, it's not really visible at normal distance. Making the focus a little fuzzy helps too. It also blends the horizontal scan lines and makes a more natural looking picture.

Originally Posted by wa2ise

I modified my Channel master CM7000 box to only feed the luma and not chroma to its RF modulator.
...
This box uses a special group delay filter on the video signal to condition it for TV set reception, just like real TV stations did back in the old analog NTSC days. Si it should produce really good pictures on your set, it does on mine.

Cool. If I can get my hands on this model, I'll give it a try.

[old_tv_nut]

Originally Posted by miniman82

you'll need to filter out the 3.58 info to get rid of the dots. It's really bad on a Philco-Ford set I just got (which is color but still suffers), the dot crawl is atrocious. I don't think it properly filters out all the info for the chroma section, there's obviously still 3.58 in the luma.

There should be an adjustable (tuned coil) 3.58 trap somewhere in that set. (The CTC-5 Super chassis didn't need one because the luma response was so strongly rolled off already.) Excess 3.58 dots desaturate the color, so you do need to fix that for best picture.