New pulse gen. power supply and scope, new cores and we are finally away. Pulse gen driving the tip3055 into my new secondary transformer. Very pleased at what I can do just with air gaps and different frequencies.
All on the video.

https://www.youtube.com/watch?v=yTfDzKP4WDc&feature=youtu.be

Alright :thumbsup2:

I've found the self resonant frequency of my chokes now. The paracitic impedance is charging them at 150Ma really quickly and i'm down at 2 volts. I'm going to have to build a bigger cell. The resistor is still across the secondary but the chokes are intercepting the signal because i've placed them between the secondary transformer and the resistor but because the chokes are resonant at the paracitic frequency then the load on the secondary transformer has gone up but not alarmingly and I can narrow the gate to bring the current down. There is a balance on the system where you have the resistor running at the gate frequency and the chokes running at the paracitic frequency via the dielectric property of water.
This is great to see.

Right, more news, another effect worked out: When the paracitic impedance is collected by the chokes, the gate frequency is missing from the signal and the voltage amplitude increases by a massive amount. There is no doubt about it, the gate frequency and its voltage amplitude stops the paracitic voltage from setting off towards infinity, once the paracitic voltage amplitude is in the chokes, the gate frequency and its voltage carries on through the resistor.
I've now isolated the two signals completely so that the paracitic signal is trapped in the choke and the gate signal is trapped in the resistor.
Holy moly. I owe Matt a few beers.

OMG, it's filling in the gate signal on the choke with more f*cking voltage and I don't know where it's coming from, it's inverting the missing time differential and filling it with voltage but the same voltage is appearing across the resistor on the gate signal. Now I know why Ronnie's signature says 'all we need is a little more time'. Ronnie, you crafty son of a gun, you knew it all along didn't you?
This system creates a gap in time and fills it with voltage that never existed only as an inversion. Holy crap.

It's definately inverted the gate signal in the chokes to more voltage. Just done it again with a bigger gate and counted the peaks. But the inverted part is twice the voltage amplitude of the normal part of the signal and as you decrease the gate the voltage amplitude gets higher and higher. There seems to be a glitch in the pulse though as if it's trying to form a new pattern between each gated area as if the scope knows there are two signals in one.
More tomorrow.

Quote from nav on May 12th, 2017, 03:10 PM

Holy moly. I owe Matt a few beers.

I'll drink to that!   :-D

Just stick with it Nav, you are making great progress and what you are showing is really starting to match up with our understanding of how this gizmo works.  Piece by piece the mystery is dissolving...

Quote from Matt Watts on May 12th, 2017, 04:24 PM

I'll drink to that!   :-D

Just stick with it Nav, you are making great progress and what you are showing is really starting to match up with our understanding of how this gizmo works.  Piece by piece the mystery is dissolving...

Got lots to do before I can think about the cell but basically we are now at this point:
1. The secondary is reactive at the gate frequency but passive of another frequency. This works best when you match a resistor to the secondary gate impedance so that the high impedance signal passes through the resistor with ease.
2. The choke is reactive at its own self resonant frequency but passive of the gate frequency. This slightly increases the load on the resistor circuit because of the magnetising force of the chokes.
3. You can find the self resonant frequency of the chokes by placing a small pickup coil on the chokes core then frequency sweep block by block. Where the chokes are the most reactive and the voltage is highest on the pickup is the frequency you need. You can set the secondary to become passive at that same frequency but this passive frequency through the secondary is doubled by the diode so if the chokes are reactive at 9khz then you set the secondary passive frequency to 4.5khz.
4. You can change the reactive and passive parameters in both the secondary transformer and the chokes with cardboard, paper, thin plastic sheet etc as gaps in the core.
I'm going to need a bigger probe, my probe is 10x and 30v max into the scope. Going to order 100x and 1000x so I can continue to show the forum this reactive and passive effect.

Right, you can't use audio transformers and switchmode power supply units as the secondary and I'll explain why. When you find the self resonant frequency of the chokes and they become reactive at that frequency, choking off that part of the signal into capacitance, you have to set up the secondary air gap parameter to match.
So lets say for example the chokes are highly reactive at 18khz and begin dumping their voltage field into the caps, the secondary passive frequency is 9khz and a secondary without an air gap won't pass that frequency while still passing the reactive gate frequency into the resistor which will also rise with air gaps.
So in the video I had 4khz passive at respectable voltage amplitude and 60hz reactance into the resistor, at 9khz passive and decent voltage amplitude, the gate reactance into the resistor also went up in frequency as a result of the air gap. You'd be hard pushed to find an audio transformer that is both reactive and passive at the exact frequency where you need it.