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It is the tobacco tar - same stuff that accumulates in lungs of those who smokes.
Good thing is, it is outside your lungs, it is not going to get there, it is easily cleaned with any solvent (just pick one that does not harm the plastic) and it actually preserved the plastic to some degree.
Smoking is eventually good for something!
People who do not drink, do not smoke, do not eat red meat will one day feel really stupid lying there and dying from nothing.
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City: Roslyn Pa
When my pals were reading comic books
I was down in the basement in my dad's
workshop. Perusing his Sam's Photofoacts
Vol 1-50 admiring the old set and trying to
figure out what all those squiggly meant.
Circa 1966
Now I think I've got!
Terry
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City: Bellmawr, NJ
wow..gets plug into a socket,,,neat
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City: Sandwick, BC, CA
Bob;
That already looks better, before it looked like the survivor of a house fire. Hopefully that line across the screen won't be too noticeable once you get the set working again.
Regards
Arran
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City: Annapolis, IL
As for the line burned in the tube, you will notice it. Saddly. Had the same on a 1953 Zenith. The original owner ran it with a collapsed vertical for the "sound", while watching a small portable set that had no sound. She could have turned down the brightness. Old lady. Turned out to be a dirty linearity control. The line was very noticeable to me. I never used it after that, but 35 years later found a NOS tube. Of course, now I need to recap everything. Almost don't want to use that new tube lol!
If I could find the place called "Somewhere", I could find "Anything"
Tim
Jesus cried out and said, "Whoever believes in me , believes not in me but in him who sent me" John 12:44
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I would take it apart, take the cabinet and CRT Case to the bathtub, wipe it all down with Dish Soap and hose the heck out of it. Shower massage works great. Remove and clean the tubes but note what locations that they were removed from, even for multiple tube of the same type. I'm a little crazy, but in extreme situations I would tape over the most sensitive components (transformers, IF cans, etc.), and do the same thing to the chassis then stick the chassis in the oven on lowest setting with the door cracked for several hours. (The NRI Radio Correspondence Course had a lesson on rehabilitating radios that were flood damaged. They actually recommended this to remove the mud (and Lord knows what else), stating since it is already damaged, you are not going to hurt it much more. there are organic solvents in spray cans appropriate for cleaning PC Board based chassis also.
I absolutely hate the smell of old cigarette smoke and it is no better for electronics than it is for us.
"Do Justly, love Mercy and walk humbly with your God"- Micah 6:8
Best Regards,
MrFixr55
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City: Roslyn Pa
If you would like to watch the progression of the Siesta it can be found here:
https://www.youtube.com/watch?v=RXdLIlyBZb8 It's up to video #10 or so. Do realize that the original post was over two years ago. Bob knows his onions about tvs and Predictas as he has service a number of them. I've got a Siesta somewhere myself that needs servicing.[Image:
https://philcoradio.com/phorum/images/sm...on_eek.gif]
When my pals were reading comic books
I was down in the basement in my dad's
workshop. Perusing his Sam's Photofoacts
Vol 1-50 admiring the old set and trying to
figure out what all those squiggly meant.
Circa 1966
Now I think I've got!
Terry
Posts: 797
Threads: 42
Joined: Dec 2008
City: Chicago, IL
Sorry I didn't keep up on this thread.
Initial power up and troubleshooting.
[Image: https://live.staticflickr.com/65535/4972...502c_c.jpg]
The vertical linearity control pot was open that what caused the vertical to collapse and burned a line into the CRT.
[Image: https://live.staticflickr.com/65535/4972...cb93_c.jpg]
[Image: https://live.staticflickr.com/65535/4972...08d5_c.jpg]
I missed a broken ground connection on the main board that took a while to track down. My quick fix was to solder a wire directly to a tube pin. Later when I pulled the board I did a proper repair.
[Image: https://live.staticflickr.com/65535/4972...45dd_c.jpg]
I did take it all apart and washed it down with Simple Green. The results were impressive.
Tuner before a bath:
[Image: https://live.staticflickr.com/65535/4972...8036_c.jpg]
[Image: https://live.staticflickr.com/65535/4972...60d9_c.jpg]
Main chassis
[Image: https://live.staticflickr.com/65535/4973...f79f_c.jpg]
[Image: https://live.staticflickr.com/65535/4974...0027_c.jpg]
Fully cleaned and recapped.
[Image: https://live.staticflickr.com/65535/4974...2ac5_c.jpg]
I also swapped out the yoke as the wiring was cut, spliced and deteriorated.
[Image: https://live.staticflickr.com/65535/4974...7b66_c.jpg]
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City: Chicago, IL
Then disaster, the power transformer shorted out.
After I washed down the chassis, I "baked" it in the oven in dehydrate mode. Even so I suspect there was some residual moisture left.
Luckily, I had a replacement on hand.
[Image: https://live.staticflickr.com/65535/4974...5222_c.jpg]
Success! It's a real shame about the burn line. The CRT tests very strong and has a lot of life left.
[Image: https://live.staticflickr.com/65535/4974...f3c7_c.jpg]
Posts: 797
Threads: 42
Joined: Dec 2008
City: Chicago, IL
(This post was last modified: 12-03-2021, 11:57 PM by
Bob Andersen.)
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