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 Post subject: Found tubes
PostPosted: Feb Sun 25, 2018 7:56 pm 
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Joined: Nov Sun 16, 2014 7:08 pm
Posts: 43
Location: Tulsa area
Just ran across a few tubes, don't think it's all the 11 tubes I misplaced, and there very dirty. What is a good way to clean them up with out taking off tube number or doing other bad things?


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 Post subject: Re: Found tubes
PostPosted: Feb Sun 25, 2018 11:41 pm 
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Location: Ohio 45177
Do not use Windex with ammonia, it will take the markings right off. I have sometimes just cleaned tubes with liquid hand soap and patted them dry instead of rubbing to preserve the markings. But did not rub right on the numbers when cleaning either. I have also used Windex on a paper towel, taking absolute care to wipe around the markings. That is easier in the instance of having a couple tubes or so to clean. And does not risk getting water in the bases if they are octals or such. Glass tubes don't mind water I guess. It amazes me how fragile the ID marks on tubes are. But I suppose that they were assumed to be put in equipment, not touched further until they needed replacement? Or clean one at a time so if the marks to vanish, you know what it is and can mark it with a permanent ink sharpie.


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 Post subject: Re: Found tubes
PostPosted: Feb Mon 26, 2018 1:10 am 
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Location: Tucson, Arizona U.S.A.
A while back someone suggested using Mr. Clean Magic Eraser from the grocery store. Use it dry. I tried it and sometimes it works and sometimes it doesn't.

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 Post subject: Re: Found tubes
PostPosted: Feb Mon 26, 2018 5:53 am 
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I believe Windex has ammonia in it.?
I would use a qtip and just water to have control around the markings.

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 Post subject: Re: Found tubes
PostPosted: Feb Mon 26, 2018 8:34 pm 
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Joined: Nov Sun 16, 2014 7:08 pm
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Location: Tulsa area
Thanks guys.


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 Post subject: Re: Found tubes
PostPosted: Feb Tue 27, 2018 8:17 pm 
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Joined: Sep Tue 30, 2014 6:08 am
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Location: The Old Dominion VA 23518
Jim Mueller wrote:
A while back someone suggested using Mr. Clean Magic Eraser from the grocery store. Use it dry. I tried it and sometimes it works and sometimes it doesn't.


Those are remarked BASF Basotect finish sponges - IIRC, about 4000-grit sandpaper. We used them to polish heat-transfer mating surfaces in some avionics boxes.

https://en.wikipedia.org/wiki/Melamine_foam

BASF markings on the bags always warned to not use on glass or glazed ceramics.

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 Post subject: Re: Found tubes
PostPosted: Feb Wed 28, 2018 9:26 am 
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Location: Montvale NJ, 07645
I have cleaned hundreds of them using windex and nothing works better. I spray the windex directly on a paper towel and carefully clean tube avoiding the numbers. If the numbers have a thick deposit of gunk on them, I may use #0000 steel wool lightly over the numbers to remove most of it.


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