Jeff,
For AC bipolar pulse, I recommend you to have a look on the H bridge which is a well known circuit in electronic. 4 MOSFETs and adequate control are all you need, to build it. http://en.wikipedia.org/wiki/H_bridge You may need to use a transformator to be able to put one electrode to the ground. Arnaud _____ From: Jack Cole [mailto:[email protected]] Sent: jeudi 22 novembre 2012 22:59 To: [email protected] Subject: Re: [Vo]:25 experiments completed with borax and nickels Jeff, I don't think your scope would need that level of resolution. Godes describes using the following: A 100MHz Fluke 196C oscilloscope meter. Anyway, there is not a lot of info on the net about using PWM to make bipolar pulses. Producing a DC pulse to those specs is not so difficult. A bipolar pulse seems to be a different story. I have a 25mhz oscilloscope, so I'll try to see if it has the resolution needed. Supposedly, it will show down to 5 ns/div on the horizontal axis. I'll try to experiment to see if I can get a 100 ns DC pulse with PWM and see how the scope does. Here is the scope I have. http://www.amazon.com/dp/B007T6XNCA/ref=pe_175190_21431760_M3T1_SC_dp_1 Jack On Thu, Nov 22, 2012 at 3:38 PM, Jeff Berkowitz <[email protected]> wrote: Interesting. A U.S. nickel is 1.95mm thick. On Thu, Nov 22, 2012 at 1:21 PM, James Bowery <[email protected]> wrote: It's hard to know where to begin here but let me just say this that given the speed of sound in nickel <http://www.olympus-ims.com/en/ndt-tutorials/thickness-gage/appendices-veloc ities/> : 5630m/s and 430kHz: 5630m/s;430kHz?mm ([5630 * meter] / second) * (430 * [kilo*hertz])^-1 ? milli*meter = 2.0838194 mm In other words, a 2mm electrode should exhibit resonance at ~430kHz. On Thu, Nov 22, 2012 at 2:47 PM, Jones Beene <[email protected]> wrote: On the contrary James, at least two of us did look closely at this possibility [electrode acoustics]. My associate went to trouble to find and download a mpeg sound file of a bicycle bell of the same general size as Davey's, and plugged it into a program for this kind of analysis - in fact it is dedicated bell analysis software that has proved very accurate for electrodes in the past. The natural acoustic of this hemisphere are nowhere close. The main freq is 4,445.5 Hz, with some sub harmonics, the lowest being around 521/545 Hz, but those are so faint as to be discarded. Higher harmonics are barely above noise. Thus, since the acoustics of the electrodes were off by two orders of magnitude over the signature sound, we did not think that electrode acoustics were in any way relevant as an alternative explanation, or otherwise worth pursuing. Jones From: James Bowery As I previously advised <http://www.mail-archive.com/[email protected]/msg73144.html> : "Look at the acoustics of the electrodes." Since this advice seemed to make no impact on the discourse here at vortex-l, let me expand: Acoustic resonance in the metallic electrodes does have a reasonable chance of bearing directly on the creation of the "nuclear active environment" hypothesized to exist. I don't think I need to expland on list the possibilities here. Moreover, if one looks at the speed of sound in metals, the "430kHz LENR signature" regime corresponds to the thickness of the cathodes frequently reported as exhibiting the phenomena. Need I say more?
