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Working with the exciter tower can be a lot of fun, and the main goal is to find the extent of the field surrounding the tower. The standard tool for this kind of work is the traditional avramenko plug which consists of two opposite facing
and a third light emitting diode completing the circuit while observing polarity.
Connecting a loop of wire in the form of an alligator clip to the bottom of the diodes helps with the sensing of the field as it acts like an antenna.
I have come to believe that charges exist within a wire and other electrical components without them being plugged in to a circuit. That is to say they are like a pipe that is already filled with water waiting to be pumped to a location. When a battery is connected to a circuit, it does not supplied charges by squirting them into the circuit, instead it acts like a pump moving the charges are around by supplying voltage differential. The higher the voltage difference, the more force is acting on the charges pushing them around.
While playing around with this system I found a couple of other methods of detecting the fields surrounding the tower. The standard field detector (the AV plug) is held in the vicinity of the tower and the excited charges move through the circuit passing through the light emitting diode and producing light. When the plant is held in contact with your fingers, the brightness of the LED is doubled. This shows an interaction with the bodies capacitance or energy field, of which I am still undecided.
A different take on the AV plug is a single diode detector. This consists of a single diode leading from the short end of the light emitting diode to the longer end, with a leap of wire connected to the long end. While in contact with fingers and within the vicinity of the excited tower it also detects the field and produces light. As long as you can direct the flow of charges, through the light emitting diode then you have a field detector. Once again the loop of wire acts like an antenna enhancing its ability to detect the field, and supplying more charges to move around.
Another version of a field detector is the transistor detector for which I have not yet come up with a name. The image shown he uses a 2n2222 transistor with the longer end of the light emitting diode connected to the emitter and the shorter end connected to both the collector and the base. Other variations of this will also work and once again a loop of wire connected to the longer end of the light emitting diode will enhance its ability to detect the field. This is an interesting circuit in that the base voltage his first supplied by the towers field which then allows charges to flow through the light emitting diode ending up back at the base hence setting up a looping circuit. It is really just another way of controlling the flow of charges through the circuit. When in contact with fingers the bodies capacitance or field interacts with the circuit and also supplies charges.
I also found that my hand wound radio was very useful for measuring the field and visualising the frequency emitted. The video below shows the handheld radio set to 1000 Khz and interacting with the field around the tower. The frequency close to the tower is in the megahertz range and quickly dissipates with distance. The point at which the radio stop squealing, is the 1000 Khz frequency. The frequency from the tower matches the frequency that the radio was set at and cancels out the sound. If the tower is not connected them the radio does not squeal.