Wow Doug, Very interesting science project. I'm curious, why are you doing this? Just because . . . or is there a specific purpose?
I don't like HV, it scares me, especially when there are thick wires that can carry lots of current, pulsed or not. Well, except ESD, that's a coffee substitute in the morning to get your body moving. About 10 years ago we had to do MIL-STD-461 EMI tests on a HV military project inside a 5m semi-anechoic chamber. Because we had never tested a HV EUT before, a 20 page safety document became part of the test plan. Requirements: 1) only 2 test persons allowed in the chamber at any time and 1 must be AED certified, 2) the AED must be accessible within 1 minute, 3) a Sheppard's hook must be available immediately if needed, 4) special rubber gloves required inside the chamber, 5) special insulated shoes required for test personnel, 6) clear indicators that EUT is energized or not, 7) emergency Power Off switch must be easily accessible, plus numerous other miscellaneous HV safety requirements that I can't remember right now. Needless to say we were very cautious with everything we did during the test. No I don't like HV, it scares me. Good luck on your HV project. And be careful ! Manny Barron EMC Engineer On Fri, Aug 27, 2021 at 1:38 PM doug emcesd.com <[email protected]> wrote: > Hi Bill, > > > > The other day I got the power supply, my interface circuitry, the > capacitor, and the right length gap all to start oscillating as a > relaxation oscillator at about 10 Hz (30 lb capacitor is rated for 360 > pulses per second). It sounds like a machine gun! My wife says I should > take it easy with this lest the SWAT team shows up. > > > > The pulse width is a few hundred nanoseconds, estimated. Trying for a more > accurate measurement. Today a roll of #8 wire should show up from Amazon > for me to make a 10:1 current divider. > > > > The capacitor stands almost three feet high with a large insulator, 13,500 > pf @ 50 kV. It weighs a lot, at least 30 lb and since I don’t want to pick > it up by the insulator, I have to drag it across the floor as there is > nothing to grab onto to lift it. I got a few of them as surplus, being > thrown out, from UNLV. Their EE department must be fun! > > > > I have been playing around with high voltage stuff since about 15-16 years > old. My experiments back then generated so much EMI that the feds showed up > at my house while I was in school. I would like to have been a fly on wall > while they were talking with my mother. This was back in 1962. > > > > Currently working on constructing a Marx generator. Parts are in from > Amazon (resistors and capacitors). If you don’t see anymore posts, you will > know what happened. > > > > I still feel like I am 16! Same wonderment at physics. My lifetime hero is > Nicola Tesla I am also like a 16 year old in that at 74, I am running a few > thousands of miles per year. Even at 110+ degrees in the summer! > > > > Doug > > > > *From:* Bill Owsley <[email protected]> > *Sent:* Friday, August 27, 2021 12:13 > *To:* doug emcesd.com <[email protected]>; [email protected] > *Subject:* Re: [PSES] My new Odysee technical channel > > > > Typical lightning is about 300 million volts and 30 thousand amps. > > And if you are within several 10's of feet of a strike, it makes an > impression. > > So a scaled down version is useful, like Doug's emp generator. > > Useful for imaginative coupling into various devices under test. > > > > Sent from Yahoo Mail on Android > <https://urldefense.proofpoint.com/v2/url?u=https-3A__go.onelink.me_107872968-3Fpid-3DInProduct-26c-3DGlobal-5FInternal-5FYGrowth-5FAndroidEmailSig-5F-5FAndroidUsers-26af-5Fwl-3Dym-26af-5Fsub1-3DInternal-26af-5Fsub2-3DGlobal-5FYGrowth-26af-5Fsub3-3DEmailSignature&d=DwMFaQ&c=euGZstcaTDllvimEN8b7jXrwqOf-v5A_CdpgnVfiiMM&r=jCRzTaNQorPZq38xZ6lIGQ&m=sp2-iZpIiLm92XEmcPXBIBJpjhPwJBr6W8MUBrfUEC0&s=iulfSxZNFywm7IvVze4oy1MTcH3xq_vR9a2ZQN0Zjys&e=> > > > > On Thu, Aug 19, 2021 at 10:55 PM, doug emcesd.com > > <[email protected]> wrote: > > I am not sure of the peak power as the peak voltage and peak current are > likely offset in time some. > > > > Doug Smith > > Sent from my iPhone > > IPhone: 408-858-4528 > > Office: 702-570-6108 > > Email: [email protected] > > Website: http://dsmith.org > ------------------------------ > > *From:* Manny Barron <[email protected]> > *Sent:* Thursday, August 19, 2021 5:05:50 PM > *To:* doug emcesd.com <[email protected]>; [email protected] < > [email protected]> > *Subject:* Re: [PSES] My new Odysee technical channel > > > > Hi Doug, > > > > Uh, let's see ... 1,000 A x 15,000 V = 15,000,000 W. > > Not sure about the gain or directivity but that's alot of power! > > Hopefully it's just a pulse or two in the microsecond range. > > And hope you're in the desert. > > Very interesting indeed! > > > > Manny Barron > > EMC Engineer > > > > > > On Thu, Aug 19, 2021 at 4:50 PM doug emcesd.com > <https://urldefense.proofpoint.com/v2/url?u=http-3A__emcesd.com&d=DwMFaQ&c=euGZstcaTDllvimEN8b7jXrwqOf-v5A_CdpgnVfiiMM&r=c9NR2mGfldry-2pM9Bbuww&m=yIOvFk6eGOB4699DY_4xOSD2hAlHciioAbJQcS1DMq4&s=Mt-t26cldbDAs9JWcQmqSyxTZalpvFdvRFznV1zYiJo&e=> > <[email protected]> wrote: > > Hi All, > > > > I have created two new video channels over on Odysee. > > > > On https://Odysee.com/@Dougsengineering > <https://urldefense.proofpoint.com/v2/url?u=https-3A__Odysee.com_-40Dougsengineering&d=DwMFaQ&c=euGZstcaTDllvimEN8b7jXrwqOf-v5A_CdpgnVfiiMM&r=c9NR2mGfldry-2pM9Bbuww&m=yIOvFk6eGOB4699DY_4xOSD2hAlHciioAbJQcS1DMq4&s=T7nCFm0nceIbZS02TODVqJX3_RzqmkcsuFG-dohJ6Dk&e=> > I will be posting technical videos as well as copying over my YouTube > technical videos there. New content will only be posted to Odysee though. I > am currently working on a new video using my home built EMP generator. > Nothing like a 1000 Ampere, 15 kV high voltage pulse to spice up the day! I > am also working on a Marx generator to get extremely high voltage pulses as > well. If you don’t hear anymore from me, I may have been vaporized. > > > > On https://Odysee.com/@Dougshealthandrunning > <https://urldefense.proofpoint.com/v2/url?u=https-3A__Odysee.com_-40Dougshealthandrunning&d=DwMFaQ&c=euGZstcaTDllvimEN8b7jXrwqOf-v5A_CdpgnVfiiMM&r=c9NR2mGfldry-2pM9Bbuww&m=yIOvFk6eGOB4699DY_4xOSD2hAlHciioAbJQcS1DMq4&s=HX_bRwuehlJJFdUFi9Z-tdVKbEKV4Y8LR0VEj0erMqE&e=> > the content has nothing to do with engineering but will contain my health > related videos, topics like diet, supplements, and running/exercise. (I am > at about 1500 miles of running in 2021 so far at age 74, much of it at 110 > degrees F in the Southern Nevada desert this summer.) > > > > Each channel now has one video with lots coming soon. Some of the > engineering videos are snippets from the demonstrations of my seminars, > including the virtual ones coming up shortly. > > > > Doug > > > > - > ---------------------------------------------------------------- > > This message is from the IEEE Product Safety Engineering Society emc-pstc > discussion list. 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To post a message to the list, send your e-mail to <[email protected]> All emc-pstc postings are archived and searchable on the web at: http://www.ieee-pses.org/emc-pstc.html Attachments are not permitted but the IEEE PSES Online Communities site at http://product-compliance.oc.ieee.org/ can be used for graphics (in well-used formats), large files, etc. Website: http://www.ieee-pses.org/ Instructions: http://www.ieee-pses.org/list.html (including how to unsubscribe) List rules: http://www.ieee-pses.org/listrules.html For help, send mail to the list administrators: Scott Douglas <[email protected]> Mike Cantwell <[email protected]> For policy questions, send mail to: Jim Bacher: <[email protected]> David Heald: <[email protected]>
