Thread: Eric Dollard
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Old 11-25-2012, 09:15 PM
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Dr Green Setup

1) Dr Green, your experiments have determined the coil characteristics well. It should be noted that when I first presented the tentative formulae for a secondary, as well as an extra, resonator, the two were NOT matched to each other, but only served as examples of design. At that time I found that an extra coil resonator for that given secondary was physically too small. Conversely one could say the secondary resonator need to be larger with less turns, a lower inductance.

2) Standing wave measurement is crucial in understanding Tesla Transformer operation. These are no longer just inductance coils, but are now complex transmission networks such as waveguides. Common electro-magnetic thinking is is useless here, thus the inability for understanding by the pedant. Never the less a good understanding of basic transmission line principles is required in this study, or understanding will be futile.

The coil networks or waveguides considered here are harmonic resonators, and as resonators the condition must exist that the total energy of the dielectric field must equal the total energy in the magnetic field. Maxwell fails us here in that energy is now a complex quantity in space. The pedant will never get it.

Detectors for pickup of the potential or current along the coil distance variable are of a critical design, since the instensity of the electric field is so high. Electronics is of no use here, Marconi era devices from yesteryear must be employed in resonant transformer work. See book "UHF Simplified" , Kiver.

Small electric lamps are best. Ne-2 neon lamps make good potential probes. On the end of a stick, one wire points at the resonator, the other wire is tapped to a small metal foil on the stick, about an inch down from the neon lamp. For current probes small incandescent lamps exist, 1.5 volt at 60 milliamps typical. This lamp is on the end of a stick connected to a 3" diameter coil "loop" of magnet wire. This will measure current. The Ham Radio setup in use now may give faulty readings as it is electro-magnetic and not magnetic.

A small RF (thermocouple) milliampere meter is better than the incandescent, but has more capacity.

A wire point, for the dielectric, and a wire loop, for the magnetic can be at the end of the stick with no lamp, but a small co-axial line to an oscilloscope, here then the lag or lead angle along the distance variable can be determined as well as the field intensity.

Finally, the graph for the lower frequency resonance is the concatenated mode, as shown for your setup. The higher is a harmonic , no good.

For this lower F mode shown each resonator is in a quarter wave distribution. The "current" probe is picking up more than that it looks to me. The degree of impedance mismatch between extra and secondary is important, it is a sort of index refraction. (Review my writing on the QuadraPolar Resonator). The degree of mismatch should be large as related to the characteristic impedance of the coils. It is important that the stored energy in each coil be mostly reflected at its point of interconnection to its companion coil, this ensures maximum magnification.


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