Mahogany Predicta Pedestal

[Electronic M]

Originally Posted by Radiotronman

All out of tolerance resistors have been replaced on the printed circuit board. Now awaiting my cap order to finish off the pcb.

You forgot the really big ones...They always have a different resistance from the color code.

[Radiotronman]

Funny Tom...while I'm waiting on the caps to come in, I took time to clean the case and the CRT housing with lense. The mold was very thick, but Easy Off oven spray made quick work of it.

[bandersen]

Originally Posted by Radiotronman

Funny Tom...while I'm waiting on the caps to come in, I took time to clean the case and the CRT housing with lense. The mold was very thick, but Easy Off oven spray made quick work of it.

It's actually not mold - that's the tenite plastic decomposing. I'm afraid that it will slowly come back

I've never heard of using Easy Off to clean these. Did it cause any harm to the plastic ?

[Electronic M]

Originally Posted by bandersen

It's actually not mold - that's the tenite plastic decomposing. I'm afraid that it will slowly come back

Interesting. I wonder if it is reacting with the atmosphere to decompose.....If it is then perhaps a transparent coating (like lacquer maybe) might stabilize it long term.

[Radiotronman]

I mostly used the oven off on the actual mold on the outside of the CRT case and band strap. I did use it in the lense cover, but very carefully. It cleans the plastic very clean and after minimal buffing, very shiny. Like any cleaner, always use in small amounts first before using. It works very well on plastic and wood, but don't use on Bakelite. It pretty much instantly takes the greasy dirt off of the rubber wire, with very little work. Makes the wire look like new.

[Radiotronman]

Ive also found that if I keep these predictas upstairs and not in the basement, that white haze on the CRT lense does not come back. I think it all has to do with temperature and humidity.

[ohohyodafarted]

Originally Posted by Electronic M

Interesting. I wonder if it is reacting with the atmosphere to decompose.....If it is then perhaps a transparent coating (like lacquer maybe) might stabilize it long term.

Lacquer will melt this type of plastic VERY EASILY. Don't even try it on something clear. I have preserved decomposing knobs with clear lacquer, and it does work well, however it is a bit risky because the surface of the knobs will dissolve while the lacquer is wet and must be allowed to re-harden. I would never try this on something that needs to be optically clear. You would be better off using a good coat of wax based furniture polish.

[Radiotronman]

I finished putting the set back together and fired it up with a variac slowly. I was rewarded with a nice raster. I then hooked up a DVD player and have great video. Now the problem is the plastic gear on the tuner fine tuning is broken. So the fine tuning knob spins freely. So I'll have to see if I can find another. Sorry I took the picture upside down.