Response to detailed questions from successful POD constructor

Q: The unit is not cold running. It actually runs quite warmly. I am not (yet) using the circuit that was provided on the web page. I am using a 555 timer circuit with which I use variable resistors to change the frequency and duty cycle, with a MOSFET switch. I am trying to understand the functioning of this device by using this setup and monitoring the effects with my oscilloscope.

When constructed per the site, the arrangement runs room temp to cool. This varies between components with the only element exhibiting any warmth being a loaded output (drive) motor. There will be no heat whatsoever in the pod coil or other electrical components. Keep in mind that with a 10 ohm set in there, simply being room temp involves a substantial net cooling effect.

Q: Thepm ring stack is approx 2 inches in length. 4 segments doesn't sound right unless they were 1/2" in thickness each.

All the dimensions are posted in the construction diagram. Just follow that. The unit and circuit have been replicated by several other people to date. The pod is actually 2 parts:

1. The pod device itself which is only used to generate potential and charge the storage capacitor. Thus the pod device itself is only pulsed 5-10 seconds at approx 1/2 hour run-time intervals. (unloaded motor)

2. The distribution circuit which is used to dispense that stored potential into a useful load "on demand". It is useless to simply dump the potential carelessly into the load circuit. Hence, "Power On Demand".

- sounds as if you are pulsing the pod device continuously.

Q: Also, my local hardware store does not carry soft or mild steel nails, so right now I am using a standard steel nail. Is a mild steel core necessary for the cold current effect?

Nails can be purchased at any Home Depot or Lowes. Just don't inadvertently grab any of the aluminum ones. Get a 6000 ft. spool of #30 at - around $15 and will last forever. The pm ring diameter sounds fine. That is not critical. You can get the ring pm magnets at any Radio Shack or mail order. BaFe magents as used in the old Sweet SQM / VTA unit are not necessary. Exotic magnets are not required at all. In fact, they should be avoided because they require higher voltages. If further experimentation is the strategy, be aware that supply voltage should be substantially higher if going with nibs, samarium, etc. The SQM was a flawed device, beset with several major problems, that would have in all probability prevented commercial development, even if Sweet had lived longer and been more sensible in the contracts he signed. Yes, the SQM is useful background reading, but please do not bring the flaws of the SQM unit across to the POD technology.

Q: Also, your comment about the capacitor charging voltage...for some reason, the backEMFfrom this coil system rises instantly to almost exactly 100V, stays there to form a short plateau, then falls down normally. I am not sure why there is a plateau there at 100V, but I think it could be connected to my MOSFET setup. The MOSFET has a built in shunt diode. So I have not been able to charge a cap up to anything past 99.8V or so (using a bridge just like the schematic on your web page).

This is due to capacitance. 15uF will get you to around 95v max. 4.7uF to 150v. 2uF to 200v+ and 1 uF up to 250v. use 250v capacitors (for pod II) since higher voltages will be obtained in the next version. As for your circuit and components, anywhere you provide a leak, it will leak. same goes for regulated power supplies. They dump excess to ground by design. Use a battery supply and (later) a battery re-charge at output or experiment with a pulsing dc variant from line.

Q: I have been pulsing it all throughout the audio spectrum, from about 50 hz to maybe 10-15 kHz or so. Most of my tests were conducted in the 1-5 kHz range (most of the peculiarities of the device seemed most prominent in this range).

Go for it.

Q: Also, I have been using some fairly low-grade/low-cost (less than $100) DMMs for some readings, and while I know that these are not going to be very accurate, they seem to convey relations pretty well, i.e. if they record a voltage increase then when measured with the oscilloscope there is an increase observed as well. So keeping this in mind, I tried pulsing one of the inner coils and measuring the voltage and the current on another one of the inner coils (remember, I have 3 inner coils in this device).

The coils are all series connected. separating the coils as input or output entities does not work. Build it as shown and alter or experiment from there.

Q: I had one meter measuring input current and one measuring output voltage and current (the output voltage and current being measured separately, of course) Generally, my meters recorded a halving of input current when the end magnet was added, and a doubling of output current and voltage when measured separately. When one of the coils is loaded, the input current drop is less remarkable (i.e. the greater the load, the higher the input current and the less the current drop when the end magnet is added). I have been pulsing it with about 10-12V unregulated low-ripple DC - that is, a step-down transformer from the power line with a 60000MFD cap and bridge on it.

Let me know if the unregulated DC supply is successful since I have not yet tried this. You should be able to use this (pulsing dc) as the pulse frequency / source as well.

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