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#16
February 22nd 14, 05:19 PM
posted to uk.radio.amateur,rec.radio.amateur.homebrew
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The "Two Transistor challenge" - taking things a bit too far?
On 21/02/2014 21:54, Brian Reay wrote:
Brown Sugar wrote: On 21/02/2014 01:35, Jerry Stuckle wrote: Not necessarily with static charges - which is what's on the CRT with the HV removed. good point Really? What matters is the energy stored. There is enough stored on the CRT to kill or at least do serious harm. Calling it static charge doesn't make it any safer. Static charge can kill, it depends how quickly the charge is transferred (the current). That is determined, as basic circuit theory dictates, by the source impedance. A Van deGraff generator can generator perhaps 10's of thousands of volts. Enough to generate huge sparks. When I was at school, it was common practice for the teacher to have a ring of pupils touching it and have sparks jumping between metal rods they held. They all lived to write it up. It was safe because the source impedance was high (rate of energy transfer low). Had he tried it with 240V, he would be up on a murder charge. Low source impedance, the mains can supply a lot of energy quickly. good point -- J |
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