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Old 7th April 2011, 01:13 AM   #1
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Default Drilling a hole in a Tube :)

That's right, I want to drill a small hole right through the trademark of a Telefunken tube on the bottom so I can fit it with an LED. Has anyone ever tried to drill a hole into a tube? My idea is to cover the glass on the bottom with a patch of masking tape and use a tiny glass drill to make a hole large enough to fit an LED into it.

Thoughts?
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Old 7th April 2011, 01:44 AM   #2
julcat is offline julcat  Mexico
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Drilling a hole in a Tube

WTF????????
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Old 7th April 2011, 01:49 AM   #3
Fuling is offline Fuling  Sweden
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Better be quick if you dont want to release the magic vacuum...
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Old 7th April 2011, 01:50 AM   #4
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I hope the tube is already deceased........
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Old 7th April 2011, 02:05 AM   #5
db! is offline db!  Canada
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Why not mount the LED in the tube socket? Most 9 pin sockets have a small pocket in the centre for a shielding pin IIRC...
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Old 7th April 2011, 02:19 AM   #6
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Quote:
Originally Posted by Dredfred View Post
That's right, I want to drill a small hole right through the trademark of a Telefunken tube on the bottom so I can fit it with an LED. Has anyone ever tried to drill a hole into a tube? My idea is to cover the glass on the bottom with a patch of masking tape and use a tiny glass drill to make a hole large enough to fit an LED into it.

Thoughts?
I think what looked a lot cooler (to a nerd) was what I did in high school when I warmed tubes with a propane torch to deform them without ruining them.

G
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Old 7th April 2011, 02:24 AM   #7
Salas is offline Salas  Greece
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It will go milky. Use the led in the noval if its a deceased one and the plan is to light it up decoratively.
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Old 7th April 2011, 02:35 AM   #8
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If you heat the glass (slowly at first) but in a very small spot, atmospheric pressure will cause it to cave in and blow through.

It may go milky, but if you work in the centre of the pins, it probably won't show.

You would normally do this with a blowpipe, which is a thin tube with a pinhole aperture at the end, they're common in chemistry labs, you put the tube into the blue cone of a Bunsen flame and blow gently into it and a little jet of flame is produced. You can probably improvise something to do the job.

Maybe.

w
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Old 7th April 2011, 03:56 AM   #9
kevinkr is offline kevinkr  United States
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I think we are all assuming that this tube is dead already. Tubes normally operate with high vacuum, and drilling a hole even successfully will let air in and ruin the tube. The getter will turn an unattractive white - as suggested mounting the led in a regular tube socket might be better.
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Old 7th April 2011, 09:39 AM   #10
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Is there a danger of implosion if you drill a hole in the glass?
I've seen rather spectacular (and dangerously) ones with picture tubes, but would guess the principle is the same.

jan didden
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