How can we measure the voltage at the coil of a Slayer Exciter?
We have built a simple 9V Slayer Exciter for a school project. We are examining the conservation of energy at the transformer. The Slayer Exciter works fine: when held in front of it, a TL-light gives light. We use a BD-139 transistor. But we haven’t succeeded at measuring the voltage of the coils.
Measuring with a multimeter give incorrect voltages, like 0V or less than 1V. So, we thought that maybe a voltage divider would work. We connected it to the top of the larger coil and to the ground of the battery. We connect an oscilloscope to the smallest resistor, at the start and at the end of a resistor. It shows a sinus. However, If we put the resistor out of the voltage divider, the oscilloscope shows the same sinus. Without the resistor! If we put one cable from the oscilloscope to the voltage divider out, it also gives the same result. If we measure with two unconnected cables at the oscilloscope it gives a weaker signal. We believe that the electromagnetic field is causing a problem to the oscilloscope and the multimeter.
Our questions are:
- How can we measure the voltage at the coil of a Slayer Exciter, the primary and the secondary?
- Why is there no current going through the top of the bigger coil to the voltage divider?
- How can we stop the Slayer Exciter from creating an Electromagnetic field? The transistor creates an AC current, but how can we know what the frequency is of that current? Is it a specific property of the transistor?
- We have tested different transistors, all of them NPN. But the BD-139 was the only transistor working. The others got too hot. What are the reasons why they don’t work?
We have built the Slayer Exciter through the following scheme: