Tobacco tar, Micamolds, and huh?

[jeyurkon]

I started to clean the 1-108 Sylvania chassis. The CRT face cleaned up with Windex. I tried both GooGone and Windex on the chassis. Windex seems to work best, but the tar seems to have really bonded with it. Any other suggestions other than something abrasive? I can't believe how much tar there is.

I've attached a photo. I seem to have a Micamold infestation. The two Micamold caps in the photo are listed as ceramic in the factory service manual part list. Sam's give a tubular ceramic part no. to replace them. I didn't know I had these so I'll be ordering more caps. Playthings of the Past has the exact Centralab part number for the tubular version. I have a stock of old silver micas I might use also.

The factory manual drawing show tubular ceramics. The Sam's photo however shows micas even though they list ceramic. Do schematics ever reflect reality?

In the center is a disk ceramic. I'm a bit amazed by what I see. It appears to have never been encapsulated. There should at least be a bit left on the leads if there ever was any. I think the missing piece was missing from day one. It's only run at about 200 volts and the value isn't critical, so I think it's quite possible that it was always this way. I just can't believe that someone would have installed it!

John