Quote from: infringer on September 25, 2012, 09:18:20 PM
excellent thinking mags I recall the videos about shorting the coils that people were trying to do to see certain effects but I think this has yet to be attempted nice outside of the box comment +1

Thanks. If Romero was using this method, we could not tell. Except for those lil solder points on the circumference of the coils. Not a normal thing seen on the outer surface of  coil windings. ;]

He either used bifi to increase capacitance, or shorted coils, just not necessarily the 'whole coil' being shorted. Or even both. The working coil bifi and shorted turns on top. We dont know for sure, but I dont think he had reed switches or any shorting circuitry, at least none seen. And constantly shorting the working coil would do us no good. Always shorted = no output ever. So it would make sense to have separate shorted windings with the working coil open to the load circuit.

I dont remember Romero making a big deal about bifi coils , at least not as much as shorting and putting some distance between the rotor and the pickup coils to reduce drag while still getting great outputs finally with bias mags. All before his Muller mod.  ;]

I always saw the Muller version was just what he believed would work with all that he was working on just before that build. And look what happened. Others were trolling him and he said, "Oh yeah, well here it is bitches!! BAAAHAHAHAHAaaa" ;]  lol  But things happened. Sold it, got mib'd, what ever. Its gone. But a lot of info and legacy still exists.  ;]



MaGs

Mags,

You are pretty close.

I'll dig up the exact post from him that describes the coil and post it here.

Back soon

Penno

Thanks Penn

Also, if you have any scope shots. I have an inkling of something I remember, but not sure.  ;]

MaGs

Hey Loner

Im thinking that maybe 1 layer of maybe the same litz. Or few turns. If that causes any drag, i dont believe too much, its possible the benefits are greater. ;]  Also Ive read that if it is a transformer on a straight core, not a closed core, that the 'primary should be on top of the secondary as the flux of the primary will be attracted to the core, through the secondary windings. Having the primary under the secondary, the field that expands outward is not as dense. So this position of the winding on top is great for you guys as you dont have to make new coils. And it should work by the book.

As for the transformer action, I dont know how that plays out with the magnet passing also. But it does seem like Romero was get 'high' voltage compared to others. What was it 23v, 24v?  I dont remember exactly, but did he have scope shots of coils loaded and unloaded? I would go look, but if you guys got them on hand, that would be cool.

From what I understand on bifi coils is, take for example the wind some wire on a nail, 100 turns, and also a nail with 50 and 50 in series bifi, and the bifi should pick up more paper clips with the same input. I never did the experiment. One guy said he did but said there is no difference. But I think I know what is wrong there...

Any advantages or differences are going to be during the time of reactance, not once currents are flowing as free as they can and the magnetic field is no longer expanding.

So the nail trick should be done with the coiled nail already in contact with the paper clips, then apply power, then lift to count the amount picket up.  The field builds much faster in a bifi due to the capacitance between windings overcomes inductive reactance and allows the field to build quickly. Im sure most have heard this, that when a magnet is attached to a magnetic metal, the bond becomes greater over time. Well, if the nail is 'in the paper clip pile when the bifi is fired, as the pulse of the field spreads through the pile, it is making links to more clips and building that bond quicker than the normal coil. So now, the bifi should pick up more clips. than powering the bifi first and then trying to pick up clips. Doing it like that will be equal to the single 100 turn nail.

That reactance of the bifi is at or I should say near the freq of the magnets passing the coil in time. So we have speedup in this range. Or maybe even a harmonic of the actual freq, which is what I lean towards, not sure, but just thinking here.

The outer shorted coils should be tried as I dont think anyone has so far. Even to test one coil with several different no. of turns and wire wouldnt be too much of a burden at this point. ;]

I would try it on normal wound coils first since most have them that way. Then make 1 bifi and test it, also with shorted coils after.

Sounds like a plan. ;]

MaGs

Thanks Loner

I gota get some zzzs  ill be back tomorrow.

Ya know what would be great. At the bottom of every page, thumb nails of all pics with links once clicked from the thread, for easy access. ;] 

Night

MaGzzz