Epic CVL Projector Build Thread

**QUAZAR** · 06-01-2009, 07:24

I built an extension socket with a "red mushroom" kill switch on it for when I work on esoteric items. It is relatively easy for someone to activate it with the plastic mallet that is nearby.

**heroic** · 06-01-2009, 13:45

Originally Posted by QUAZAR

I built an extension socket with a "red mushroom" kill switch on it for when I work on esoteric items. It is relatively easy for someone to activate it with the plastic mallet that is nearby.

Be warned that nylon conducts very nicely at a couple of kV.

I discovered this in a sonar lab when my nylon trim tool decided to become conductive (damn those delocalized electrons) while I was adjusting the trim cap on a resonant transducer. When you hit resonance, you get a nice two or three kV standing wave there, and the pulse energy is a good ten or fifteen joules on high resolution inspection ultrasounds like the one we were building.

In other news, it fracking HURT. I had to order a set of hi-pot trim tools... with my hands shaking.

**QUAZAR** · 06-01-2009, 15:31

Originally Posted by heroic

Be warned that nylon conducts very nicely at a couple of kV.

The head is rubber.

Does that help?

**mixedgas** · 06-01-2009, 18:00

Three letters and one word, from years of working in a HV based lab

PVC pipe and teflon

I did not have much problem with nylon though...

Steve

**QUAZAR** · 06-02-2009, 04:38

I shall consign the rubber mallet to the bike shed and look for some plastic drain pipe next time I play with HV.

**cat** · 06-02-2009, 09:29

The moral of all these stories is that you can never have too much SAFETY when it comes to lasers or anything else that has electricity going thru it............I thought being in the electrical field was scary enough. .........Cat

**Doc** · 06-02-2009, 10:01

Black rubber is conductive when the potential is high, as is black pvc.

**Things** · 06-03-2009, 04:02

Metallic paint is also conductive D:

I had a rather bad experience with my neon sign transformer last year, I managed to hit the terminals with my hand once. 15kV 30ma right thru my left arm.

Now THAT was sore for about 2 days

**aijii** · 06-09-2009, 05:35

don't touch train wires:

http://trogoglin.ning.com/video/vide...%3AVideo%3A322

**aijii** · 06-09-2009, 05:37

might i add that video is somewhat graphic, if you're faint hearted do not watch it

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