This is my first attempt to replicate the basic POC OU effect.

First I want to thank Chris for this extraordinary site and its amazing content! I only came across it recently and wish I had known of it for the last few years that I have been experimenting. But it is never too late, so I want to start from scratch with POC effect.

Since this is my first post and the interface is very new, please forgive any errors. I will learn and correct as I go along.

My goal is to document in a way that others can also replicate by following my mistakes and successes.

I wound three coils on a 8cm ferrite rod thus:

L2 99 turns CW followed by L3 99 turns CCW

Then L1 on top of L2 with 98 turns CW.

All coils made with 26 SWG.

I tried to pulse L1 with 3.6 volts from standard PSU using IC555 circuit. This did not give any effect as the frequency was too low and I had no idea of what would be the resonant frequency.

The solution was to use Jagau's SRO circuit which automatically oscillates at resonant frequency, which I found to be about 12KHz in this case.

Below are photos and oscilloscope captures.

Coil and SRO circuit by Jagau

In order to get any useful signal on L3, I had to add a resistor and diode in both L2 and L3.

With resistor value of 33 Ohms and diode in opposing directions, I got the following in L3:

Red is pulse going into L1

Yellow is floating signal in L3, without connecting ground which seems to kill the signal.

Zooming in on this:

Slight adjustments on R1 give the following two variations to the pulse:

All the above readings are taken in the junction of the resistor and diode. The following is taken at the junction between L3 and diode:

I'm thrilled to get the ringing waveform but am not sure if I see the OU effect clearly lasting beyond the end of the L1 pulse.

Hence I request your guidance on how to further optimise the effect.

Thank you for your help and guidance!