Confirmation of OU devices and claims

[itsu]

Thanks Itsu for spoiling me with this great video. What you said about connecting all the
to a super cap and beefing up the big coil driver will be very interesting. Thanks again
from 4 degrees south of the equator right in the middle of the INDIAN OCEAN.

seychelles,

I hooked up the 3 satellite coils DC output together and to a 15F supercap stack.

Running the big coil with the gate driver on 12V battery and have a ground lead to its negative rail and thus
to the variable cap.

Still running 193Khz square wave input 50% duty cycle from a FG also on a battery.

Input into the gate driver is 12.4V @ 130mA.

The voltage across the supercap stack is 1.5V and climbing @ 31mA rms, so it will take a while for the supercaps
reach 12V.

So these 3 coils produce about ¼ of the input current in their present positions.

Video here:  https://www.youtube.com/watch?v=RCMblzJmFLQ


Itsu

[a.king21]

Itsu:  I noticed an anomaly when I measured the voltage across the 12 volt 4 watt bulbs when powered by a satellite coil  The brightness indicated maybe 3 to 4 volts but the volt meter measures 0.2 of  a volt and less sometimes.  I do not know if the meter cannot read the voltages at this frequency. Also the bulb runs cold.  I wonder if you could check that out please.
IE the voltage powering the 4 watt bulb and the coldness versus a comparable brightness  of a 4 watt bulb normally powered.
Thanks.

[itsu]

A.king21,

i will check on that, i use a 12V 3.5W led bulb on a satellite coil with No rectification, just the coil and the parallel cap (5nF).

My Fluke 8060A true RMS meter reads 2.2V (AC mode) and my scope shows the below signal.
Yellow voltage across the bulb
green current through the bulb
red power calculated from V and I

I know from experience how multimeters can fool you when out of frequency range (most go to 10Khz max).
The bulb back reads 1°C above ambient (24° compared to 23°).

Gate driver is grounded

I will try severall combinations.


Itsu 

[gyulasun]

Hi Itsu,

Okay on your TX coil data, thanks. The wire length is too short to behave like a quarter wave coil on the
190 or 130 kHz frequencies so I cannot really compare it to a Tesla coil at this low frequency. 
Around 1 MHz it may more easily behave like that if operated as a Tesla coil, with an open end on its top.
In this latter case, the current distribution alongside the coil would be like having a maximum value at the
bottom and decreasing towards the top to a minimum value, just in the opposite way the voltage distribution
would behave when the tuning is correct. The reason for the minimum current at the top is that electrons
cannot 'go' beyond the top end of the coil wire, a small leakage may happen at a high enough top voltage
maximum, helped by some top capacity load. 
Thanks,
Gyula

[gyulasun]

A.king,
I think you have an oscilloscope and function generator.  If so, you can check your DMM's AC frequency response
by measuring the output voltage level across the output of the function generator, starting from say some hundred Hz
and then at some kHz, then at some ten and then some hundred kHz while you monitor the output voltage by the
oscilloscope too.  The waveform chosen should be sine wave, for a start. 
The scope shows peak to peak amplitude, you need to divide it by 2.81 to get the RMS value DMMs usually show AC.
This is correct only for sine waves within the specs,  distorted waves may have differing RMS values already.
IF you have a TRUE RMS type DMM, then the AC frequency range may go up to the some ten kHz range and higher,
otherwise they good up to perhaps some hundred Hz, and sine wave only.   
Another problem may be when the LED bulb simply cuts the "caps" of the sine wave coming from the resonant
LC circuit, you have no more sine wave, see itsu's scope shot on the voltage wave shapes.

Of course if your DMM has a Operation Manual, then the specifications in it may include AC frequency range for current
and voltage.  Unfortunately, some DMMs do not have manuals. Searching on the web by the type number may brings hits.

Gyula