Hi all,
Yesterday I tried out the circuit below. Basically it is something like the Bedini solid state oscillator. I used relay for switching and a basic 555 timer to pulse the relay. I had two pots to control the frequency and duty cycles of the impulses. The goal was to charge the coil to create a big electromagnet with a big field around it. And when the relay breaks the circuit, the fields energy of EMF wont have anywhere to go, except the + terminal of the battery thus charging it. I thought that by adding the ground wire with a diode like Kevin said, should make the battery to charge up. I had no ground wire so I simply made the circuit run without the ground and see what will happen. That is something like Ricks selfrunner. The voltages on the battery were jumping from 12.50 to 13.50 V (the resting voltage was about 12.5). But the battery did go down slowly. Then I placed a second battery in the system, like in the basic SSG circuit, to see if that battery will charge faster than the primary battery discharges. Also no luck this time, maybe because the batteries were not conditioned or maybe because the ground wire was not attached. But I noticed an interesting effect. I tried three different coils with the welding rods as a core. At first I tried a coil with about 2000 windings of gauge 21 wire. The resistance of this coil was 10 Ohms. When the circuit was switched on, the charging battery started to charge petty fast to a certain voltage (12.8) and then slowed down. The amp draw form the primary battery was about 90mA. Then I switched the coil for another one. This coil was a trifilar coil with 500 windings of gauge 24 wire and both ends of the coils were connected together, I mean the three coils were in parallel. That way the resistance of the coil was only 1.2 Ohms. When I switched the circuit on, the charging battery went to 14.5v very fast, in about 1 minute and then slowly started to decrease. But also the primary battery went down pretty fast as the amp draw was much bigger. But the interesting thing is that there was a much bigger field around the coil and at the ends of the coil core. I held a screwdriver in my hand and it vibrated in my hand about 2 inches from the core. The field was much bigger than with the coil with higher resistance. Also I made an experiment when I put two mumetal plates on both ends of the coils core. By doing that I retained much of the field in the coil, this decreased the amp draw from the primary, but also decreased the charging effect. That's why Peter Lindemann says, that by folding the magnetic field around the coil, we get more torque but less charging. I will try this simple circuit on conditioned batteries and with a grounding wire and the diode attached. Maybe these observations will help someone
