STEORN DEMO LIVE & STREAM in Dublin, December 15th, 10 AM

[Omnibus]

I thought I might bring you up to date on what's going on here while waiting for the TCP0030 current probe. First thing was to eliminate any additional wire that does not contribute to the workings of the device. The BNC from the pulse generator is the shortest I could find and it gets directly into a female BNC connector on the board. One of the transformer primary coil (having a resistance of 64.1701Ohms) leads are soldered directly to the female BNC. The other one is in parallel with a resistor of approx. 0.0038Ohms which on its part is soldered to the ground of the female BNC connector. The resistor in question is crucial for unearthing the effect. @LarryC was emphasizing that (namely, the fact that it has to have a possibly smallest value to avoid drawing of power). That resistor is parasitic in the circuit and will be eliminated by using a current probe. Its value must be low, though. If it isn't you may miss the OU effect big time.

[Omnibus]

Here's the schematic diagram:

[Omnibus]

... and, here's what I've got. This is taken at 1Hz. 1Hz, mind you--no inductance concerns, no nothing. We got OU over 200%. Again, 1Hz:

[Omnibus]

The Excel file:

[Omnibus]

Now, that's for 50Hz. Look at the weird forms voltage and especially current have. As you saw above, at 1Hz the sine wave is a sine wave and the current and voltage are not out of phase as would be expected for an inductive coil--frequency is too low. At 50Hz something happens and I attributed it to the long BNC cable from the pulse generator to the device which on top of that had about 6 inches of non-BNC part. Antenna, I though or some similar nuisance. But, no, now with the shorter, rigorous BNC cable the distortion has remained the same. Whatever. You can see clearly OU. Here too inductance can hardly play a role. I wonder if you can see in the pictures above the tiny wire, which is in fact a piece about an inch long from a spool of magnet wire from RadioShack. It's tiny and one can't do much with it but at least I bent it to resemble bifilar, just in case.