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 Post subject: Marking tested tubes
PostPosted: May Wed 01, 2019 9:12 pm 
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Joined: Jan Thu 01, 1970 1:00 am
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Location: Coopersburg, PA USA
Whenever I test tubes in a radio or TV, and they test good, I apply a dot of green acrylic paint, like you get in craft stores, on the top shoulder of the tube with a Q-tip. Never any "Did I test that tube?" questions.

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 Post subject: Re: Marking tested tubes
PostPosted: May Wed 01, 2019 9:47 pm 
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Joined: Dec Tue 23, 2014 6:51 pm
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Location: N. Palm Bch, Fl.
I like that idea. MISS works every time.

Freeman
Edit: I wish I had paid attention in the English class.


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 Post subject: Re: Marking tested tubes
PostPosted: May Thu 02, 2019 9:32 am 
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Location: Tucson, Arizona U.S.A.
Does it burn when the tubes get hot? Long, long ago I tried fingernail polish and found that on hot tubes it would burn and turn brown as well as smelling bad.

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 Post subject: Re: Marking tested tubes
PostPosted: May Thu 02, 2019 12:00 pm 
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Location: Coopersburg, PA USA
I've never had a problem with the paint burning.

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Coopersburg, PA
http://www.saegerradio.com/


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 Post subject: Re: Marking tested tubes
PostPosted: May Tue 14, 2019 7:38 pm 
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Joined: Nov Fri 10, 2006 12:24 am
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Location: Thornhill, Ontario, Canada
For tubes with black plastic bases I just write on them with silver permanent marker. For all-glass tubes I use black permanent marker... doesn't look great, but the electron have not complained yet!
Cheers,
Roger

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Roger Jones,
Thornhill, Ontario
Ontario Vintage Radio Assoc. http://www.ovra.ca


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 Post subject: Re: Marking tested tubes
PostPosted: May Fri 17, 2019 3:34 am 
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Joined: Apr Wed 24, 2013 10:08 pm
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Location: Highland, MI
I label all tubes with a tiny label that shows results of the mutual conductance test. It's time consuming, but I know exactly what I have.

Bakelite bases get the tube number engraved... just in case the number gets wiped off the glass in the future.


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 Post subject: Re: Marking tested tubes
PostPosted: May Fri 17, 2019 3:42 am 
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Location: Sanford Fla 32771
Quote:
Bakelite bases get the tube number engraved... just in case the number gets wiped off the glass in the future.

I engraved the bakelite bases of a couple of tubes with my laser cutter, but it was too much trouble, so now I just label them with brother labeler.

Quote:
For tubes with black plastic bases I just write on them with silver permanent marker.

I like this better.

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 Post subject: Re: Marking tested tubes
PostPosted: May Fri 17, 2019 4:59 am 
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Location: S. Dartmouth MA 02748-1225 USA
I do the silver marker on the glass, the tester reading over the chart value. The marker is easily removable with solvent.

Wish someone would offer water-based stickers like are found on vintage tubes.

Chas

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 Post subject: Re: Marking tested tubes
PostPosted: May Sun 19, 2019 8:16 pm 
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Joined: Sep Fri 14, 2012 12:18 am
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Location: Otis Orchards WA 99027
I use red, green, and yellow self adhesive paper dots. The dot color corresponds to the meter markings for bad, good, and marginal. I put the dot on the top of the tube for visibility when it's in a box or inside a radio. They are easily removed if desired.

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- Mike
When your memory goes, FORGET IT!


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 Post subject: Re: Marking tested tubes
PostPosted: May Mon 20, 2019 4:11 pm 
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Joined: May Tue 30, 2006 4:46 pm
Posts: 10014
Location: Santa Rosa, CA
I would not mark the glass on a hi temp tube (rectifier or power output) with ANY material.

https://www.bulbs.com/blogs/light_sourc ... Care!.aspx

Quote:
A common cause of early failure for quartz halogen bulbs is surface contamination, and the most likely source of contamination comes from touching the glass portion of the bulb with bare skin. Even clean skin will leave behind oils. This contamination causes a hot spot when the bulb is operated, which can result in cracks or bubbles that will allow halogen gas to leak out, resulting in early failure


Rich


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 Post subject: Re: Marking tested tubes
PostPosted: May Tue 21, 2019 7:38 pm 
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Joined: Jun Wed 08, 2011 2:33 am
Posts: 9545
Location: Ohio 45177
I found that the curved surface of bakelite tube bases tends to shed adhesive paper stickers over time. I would prefer the more permanent paint mark.

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 Post subject: Re: Marking tested tubes
PostPosted: May Thu 23, 2019 4:44 pm 
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Joined: Apr Wed 24, 2013 10:08 pm
Posts: 1285
Location: Highland, MI
Here is an illustration of how I label the test results for mutual conductance... a tiny label and scotch tape. You can faintly see the engraved tube number on the bakelite base on the right.

No angst for future collectors if the tube number is removed from the glass. I have a number of tubes with no ID.


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