Re: I should have a 100 watt wire wound resistor here to use, thanks for the gentle warning.

tubesforever,

I hope my post didn't sound like I'm a mother hen, and I don't want to discourge anyone working with tubes.

I have been injured many times by white-hot sparks due to my own carelessness. I'm sure you have received a piece of dust in your eye that feels as if your eye has a dagger in it! With careful cleansing and your own tears, the pain will go away.

In 1978, I was building a high voltage supply (2kV @ 1.5A). I was having problems with the power supply, some sort of oscillation occured at a certain current level. I was bone-tired, and at the end of the day, my good judgement wasn't working. I switched off the power supply, but I was in a hurry to go to bed. I used a test probe wire with copper alligator clips to short the power supply. I heard what sounded like a 0.22 caliper rifle shot, and a blinding blue flash, followed by the worst pain in my life!!! A piece of white-hot copper landed in my right eye. Fortunately, I was not blinded.

My advice is this: Don't work with high voltage when you are tired, angry, and upset. Don't let your hobby kill you.

Regards,

Mike

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Follow Ups Full Thread

Topic - Proper procedure to bleed a power cap. - tubesforever 15:33:23 12/17/05 (14)

After all this I found that my tube amp has bleeders in the circuit. - tubesforever 11:57:41 12/23/05 (0)

Necessary to drain caps with bleeder resistorin the circuit? - tweakydee 13:01:21 12/18/05 (1)

no, if it is installed...... - REL54 15:54:27 12/18/05 (0)

Before you take your amp to the test bench.... - grhughes 07:14:21 12/18/05 (0)

Ron is right...I'll only add - Russ57 05:51:33 12/18/05 (0)

Re: a misconception - ROehlert 22:12:59 12/17/05 (0)

Ahhh, sparks ain't nuttin...read on... - Kico 18:03:06 12/17/05 (0)

Don't do it! - Mike Burrows 16:01:02 12/17/05 (3)

I should have a 100 watt wire wound resistor here to use, thanks for the gentle warning. - tubesforever 16:07:22 12/17/05 (2)

Re: I should have a 100 watt wire wound resistor here to use, thanks for the gentle warning. - Mike Burrows 16:39:54 12/17/05 (1)

I am so glad you did not get blinded! - tubesforever 17:46:55 12/17/05 (0)

Re: Proper procedure to bleed a power cap. - REL54 16:00:50 12/17/05 (2)

Thanks Ron - tubesforever 16:09:12 12/17/05 (1)

Re: Thanks Ron - ROehlert 22:16:55 12/17/05 (0)

Follow Ups

Re: I should have a 100 watt wire wound resistor here to use, thanks for the gentle warning. - Mike Burrows 16:39:54 12/17/05 (1)

I am so glad you did not get blinded! - tubesforever 17:46:55 12/17/05 (0)

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