Hi John,
Yes it is a mistake to read too much into this amp-turn detail. It is more of a curiosity. The important thing to try to fit into the big picture, especially as a design option for kilowatt level LENR, seems to be that external magnetism at a moderate level is beneficial (per Letts/Cravens), and furthermore, that a surprising way to achieve a magnetic field is via resistance heating wire itself when properly configured (instead of having a dedicated electromagnet plus dedicated heating, as two separate inputs). AFAIK – no one prior to Rossi has realized this dual use for resistance heating. It could be the main reason that the hot cat can achieve the remarkable performance claimed. In fact, Rossi himself may not have been aiming for a magnetic effect, per se. Some months ago, no answer was forthcoming for the question of whether the new TIP report concerned the hot version or the original version or both. Mats Lewin seems to think it is the hot version. The hot version fits more neatly into the SPP theoretical base and magnetism fits nicely as well… not to mention conversion of heat to electricity. From: John Berry That oem page just turns out to be about amps/turns not being as accurate as a full calculation. No actual coil gauss tests were made despite the writer claiming that they should be. Hence no magic as such, the MOD-A is calculated to be no stronger despite a higher amps/turns, given an identical ID and length then this must mean a drop in the overall current density per square cm of coil cross section. But would result in the OD increasing in the amps turns is higher. This makes sense since it says there are more amps, more amps requires a thicker wire and thicker wires don't pack as well assuming they are round. John On Fri, Jul 4, 2014 at 4:44 AM, Jones Beene <jone...@pacbell.net> wrote: If you have seen the famous image of the Rossi HT "HotCat" showing the resistance wiring, then you probably realize that the electrical input, even though it is used for heating, and even though it is not applied constantly - has an equivalent amp-turn property. http://www.wired.co.uk/news/archive/2012-09/14/cold-fusion/viewgallery/29059 8 It can be estimated that the amp-turn equivalent of the device pictured is 10,000 if one includes the turns around the wire axis at 10 amps input - but that this arrangement cannot be modeled as a solenoid, and the resultant magnetic field would be complex, probably helical and only a few hundred gauss. Still, the 10,000 amp-turns stuck in my mind as worth remembering, since Letts/Cravens found that LENR benefits from modest fields of a few hundred gauss and not higher. As fate would have it, this value turned up recently as a "magic rating" in another field http://www.oem-usa.com/news/info_The_magical_mag_coil.html ... magic indeed. The $64 question in all of this is why a small field works best - and does a small helical field work best of all?
