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Re: camcorder CRT

You can enjoy up to 30kV from a big CRT TV or VGA monitor. From a 1" CRT expect up to about 5-10kV depending on the deflection angle.

Carefully discharge the tube (which is in essence a giant capacitor) and any associated HV capacitors through a big resistor. Big in terms of easy to touch the terminals with, not ohms. Try anything 100 ohms to 1K or so. You should hear an audible *click* when you short out the high voltage, and give it a few seconds to completely discharge. To be extra sure maybe put a multimeter across the terminals after to check that it's completely discharged.

Kind regards,

Nick

----- Original Message -----
From: Eugene <>
Date: Friday, October 17, 2003 11:04 am
Subject: Re: camcorder CRT

> If it is old enough to be a CRT on not an LCD then there will be a 
> high 
> voltage of a few thousand volts just like a full size CRT.  Also 
> the CRT 
> itsself will act as a capacitor so the stored charge there can 
> "bite" you 
> pretty good.  Though most of us have been shocked probably more 
> than once, a 
> high voltage does have the potential to cause real harm.  Just 
> remember those 
> paddles used to revive people on the hospital/ER/doctor/rescue 
> shows on TV 
> use the same type of capacitor discharged high voltage to 
> start/stop a heart.
> 
> On Thursday 16 October 2003 5:18 pm, Jennifer Pellinen wrote:
> > I got a broken camcorder off of ebay and it came
> > yesterday. the CRT seems to work but because the
> > camera is broken there was no image, the CRT was lit
> > up though. The CRT setup has, the CRT, an LED, and a
> > MIC. it has 8 wires comming off of it. The wires are,
> > Brown, Red, Orange, yellow, green, white, black and
> > blue. Both the black and white wires are encased
> > together in a grey sheath. I haven't opened it up yet
> > so I don't know whats inside. I don't a proper screw
> > driver for that. I am probobly going to pick one up
> > today. The CRT setup has a sticker labeled
> > "manufactured september 1991. Also there it says
> > "caution risk of electric shock. do not open." Is
> > there realy that much of a riks of shock? Is it safe
> > to handle a bare CRT with power flowing? What other
> > safety precautions should I worry about? Once I crack
> > the thing open I suspect it shouldn't be to hard to
> > isolate the wires for the CRT. Also I might want to
> > keep the mic on there. But due to weight
> > considerations I might remove it. I don't know much
> > about camcorder CRT's asside form the stuff on this
> > list. I will keep you posted when I crack it open. I
> > might even take some pics.
> >
> > Jennifer Ann Pellinen
> >
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