Achtung! High Voltage!

[SteveNielsen]

Re: Achtung! High Voltage!

I once watched a spark jump about 3/4" from the flyback area of a crt into the tip of my thumb, then out the tip of my index finger 1/2" to the chassis - the higher the frequency (I think it was 15-something Khz) the closer to the bone the current travels, my hand felt a little weird for days afterwards.

When I was 15-16 I had an inop TV set that I only kept in my room so I could draw an arc from the flyback to an insulated screwdriver for entertainment. I could draw an arc about 5/8" max. Never got bit by it but for a kid I was being damn careful.

[stj]

Re: Achtung! High Voltage!

I agree with the last part, which accounts for how Nikola Tesla was able to hang out
in his room with all that sparking going on - wonder what frequencys he was working with...

Experiments with Alternate Currents of High Potential and High Frequency.pdf

search for it!

[xelectech]

Re: Achtung! High Voltage!

When I was 15-16 I had an inop TV set that I only kept in my room so I could draw an arc from the flyback to an insulated screwdriver for entertainment. I could draw an arc about 5/8" max. Never got bit by it but for a kid I was being damn careful.

As you probably know, the bigger the crt the higher the high voltage - the one I had was one of those big ole console models, I think maybe 25"...what better entertainment is there, and that ozone smell, so fresh so pure

[stj]

Re: Achtung! High Voltage!

24-26Kv on those.

[xelectech]

Re: Achtung! High Voltage!

24-26Kv on those.

Even a little higher on some, 30-32Kv, enough to generate x-rays, though that fact was never publicized.

[stj]

Re: Achtung! High Voltage!

lead-glass on the face and shielding at the back mitigates that.

[CapLeaker]

Re: Achtung! High Voltage!

Got 3 strings of 600VDC from my solar panels that feed a 10kw inverter every day. I also worked on 3 phase systems and RF tube amplifiers up to 10kw (radio station). If you get zapped working on one of these, that's the last mistake you ever made. TVs, radios, Ham Radio gear, low voltage stuff I don't count anymore.

[kaboom]

Re: Achtung! High Voltage!

@capleaker:

"One flash and you're ash."
"If it's not grounded, it's not dead."

[CapLeaker]

Re: Achtung! High Voltage!

I haven't heard those ones before

[Per Hansson]

Re: Achtung! High Voltage!

No I try to always de-energize all circuits before I work on them*
Not the least because it's just as likely to damage the equipment itself otherwise when working on it!

*But I admit to sometimes not following my own rules

[SteveNielsen]

Re: Achtung! High Voltage!

I learned an awful about about safety in the Navy and for all the right reasons; survival of the person and the equipment. Plus it really pisses the Navy off when they have damaged or lost either, and there is no such thing as an unavoidable accident in the Navy. They can ALL be prevented somehow and usually by being careful. The only time a sailor is allowed lose control is on liberty call and that's why they have Shore Patrol out there with them.