Kapanadze Cousin - DALLY FREE ENERGY

[gyulasun]

Hi Nick,

I was editing one of your scope pictures (see attached) when TK and Itsu reflected on your scope topic but anyway here is
my answer I prepared.
It is very good your scope channel CH2 seems to work too. You could use CH2 of course with the 100x probe, you could check CH2
by switching the Vertical MODE selector switch to position BOTH or to CH2 as now you know,
and switch the Trigger Source selector switch to position CH2 or to even VERT MODE (see
this switch in the lower left corner of your picture I indicated with a black line).
After this settings you connect the 100x probe to the CH2 input and you clip the tip of the probe
to the PROBE ADJUST output where a test signal is available. To see this 500mVpp (peak to peak)
1kHz square wave at all with the 100x probe, you have to choose the most sensitive input amplitude,
the 5mV/DIV by the CH2 rotary range switch, ok? (turn range switch fully clockwise).
So you should see just one_vertical_division_high square wave on the display (see note on the
CAL knob setting below).  You can repeat this for CH1 of course, just for fun.   

You can see the 3 green lines pointing to the 3 CAL knobs. In your picture the CAL knobs are just in
3 different settings, you may wish to turn all the 3 knobs fully clockwise in the detent position (they are
relatively rarely needed to control). In their detent settings you get a chosen VOLT/DIV voltage range switch
setting be true or you get a chosen SEC/DIV time base range switch be correct. If you turn these CAL knobs
anticlockwise (i.e. you release them from their detent positions, you get approximately 2.5:1 amplitude range
control (continuously variable) with respect to a chosen VOLTS/DIV or for the time base control with respect to
a chosen SEC/DIV setting. Putting this otherwise: you "uncalibrate" the chosen amplitude or time base
(rotary) switch settings and may easily fool yourself when you need to evaluate a waveform peak to peak
amplitude or its frequency.
One more notice: I can see your input coupling is set for AC in CH1 and DC for CH2, it is advisable to choose
DC coupling for most measurements (on both channels).

Gyula

PS: there is an Operator's Manual for your scope (if you do not have one) here:
http://exodus.poly.edu/~kurt/manuals/manuals/Tektronix/TEK%202205%20Operator.pdf  and see PDF file page
31 on explanations on the trigger SOURCE  switch settings if you need.

[NickZ]

   Gyula, Itsu, TK, and all:
  Here is what the probe adjust reading looks like for my scope's channel 2, below. I don't see a square wave, just the horizontal lines. Probe negative clip on the EXT input outer housing of that connector.
  And second image is of what the Mazilli's fet drain/source signal looks like on channel 2 (100x probe). It's hard to get even that image of a steady wave form.

   Great to see all you guys helping out. And good to know that my the Mazilli's induction crt, running at 24khz or so, is in the right ball park.
  I do have a scope manual for my 2205 model, and I have been reading it.  It's just the math that I don't like, but, I'll get that down as well.  I like tuning knobs, over pressing digital buttons.

  PS. Itsu, just where on the Kacher crt, should the probe be connected to see the Kacher's wave form to calculate it's output  frequency?  And the antenna's output HV frequency, also?
  The new Kacher circuit that I want to replicate is Ruslan's simpler model, like the picture below. Sorry for the blurry image.
 

[lost_bro]

Beautiful build!
Where is the schematic ?

Good evening verpies
I attached an excerpt from the US patent from which I took the original idea for the design.
I also attached a schematic of *one* of the versions I tested of the design.  I made this a while back, and in my LTspice directory I found no less than a dozen different variations of the same design.  I do remember playing around with the polarity of the 3rd mosfet. In some versions I find it inverted in relation to the lowest ground potential.  I do not remember how I finally left the 3rd mosfet in the final device seen in the video.  I do know that capacitor #65 (energy recycling cap.) does get *slightly warm* to the touch when left to run at 1.5-2kV, so it is absorbing/cycling reflected energy/leakage inductance. The main filtering/supply cap #50 remains cool at the same time.  The mosfets I used are rated at only 50 volts (HUF75344P3), but do not even get warm to the touch when left to run for twenty minutes outputting 1kV5 .   The GDT is wound with braided Silver plated copper/ teflon coated wire and the secondary side (GDT) runs a negative offset on the gate drive voltage waveform (-5 to +12 volts), so it is insured by design to turn off hard the mosfets under spurious conditions.

The 3 switch flyback was built to supply HV for another project which I have still not finished........

Also attached the complete patent for anyone interested.

EDIT: added one more photo to show the neon bulb & copper tape placed over the aluminum EMI reflector.  One terminal of the neon bulb connects to the copper foil tape (which is glued directly to the aluminum metal EMI reflector) and the other terminal in series with a switch which then connects to the positive rail of the input.  Strange thing is when the neon bulb is turned *on* the output voltage reads steady on the scope, and the input wattage (read on digital power source) *drops* a few milliwatts concurrently. 

take care, peace
lost_bro

[TinselKoala]

@Nick: Thanks for posting those photos. From the Probe Adjust trace: this actually looks pretty good, and falsifies my guess about the probe compensation causing the sloped bottoms in your Mazilli traces.The compensation is probably OK, and there must be another reason for those sloped bottoms. Maybe capacitors, maybe the Zener diodes, I'm not sure. You aren't seeing the vertical portions of the square wave because the Intensity is turned down and these lines are very thin in the first place. Nothing wrong there, if you play with the Intensity you will probably see them when you turn it up a bit. But then turn it back down to avoid burning the phosphor in the CRT.
In the one where you are showing the Mazilli drain signal on CH2: The reason your trace is unstable is because you have the Trigger Source still set to CH1 and there's nothing happening on CH1. Look at the switch on the far right of the picture: Trigger Source set to CH1. Set this switch to CH2 and adjust the Trigger Level knob to stabilize that display.
(This might also affect the Probe Adjust trace and make the vertical parts easier to see, maybe.)
The oscilloscope is the "King" of Test Equipment, and even a basic one like the 2205 will have a pretty steep learning curve at first. If there's anything that's not clear about using yours, just ask and you'll get probably more help than you actually need....   


One Very Important thing to remember at all times is that the BNC shields or outer conductors of both channels are connected together at the scope chassis, and are connected back to the Mains line cord ground pin. So the "black" or shield lead, ground clip, etc. of any probes you connect, are also connected to the Mains line cord ground pin, and to each other.

[itsu]

   Gyula, Itsu, TK, and all:
  Here is what the probe adjust reading looks like for my scope's channel 2, below. I don't see a square wave, just the horizontal lines. Probe negative clip on the EXT input outer housing of that connector.
  And second image is of what the Mazilli's fet drain/source signal looks like on channel 2 (100x probe). It's hard to get even that image of a steady wave form.

   Great to see all you guys helping out. And good to know that my the Mazilli's induction crt, running at 24khz or so, is in the right ball park.
  I do have a scope manual for my 2205 model, and I have been reading it.  It's just the math that I don't like, but, I'll get that down as well.  I like tuning knobs, over pressing digital buttons.

PS. Itsu, just where on the Kacher crt, should the probe be connected to see the Kacher's wave form to calculate it's output  frequency?  And the antenna's output HV frequency, also?
  The new Kacher circuit that I want to replicate is Ruslan's simpler model, like the picture below. Sorry for the blurry image.

Nick,  do  not connect the probe for checking the kacher or antenna, its a nasty high frequency, high voltage AC signal that can damage your scope, PS, DMM etc., so be carefull with it.

Like i mentioned in the above post #10306:
"Nick, now do the same with the probe laying close to the kacher and then you have both frequencies you need."

So just place your probe near by the kacher and/or antenna like you see me do in the above video of the "micro SSTC" and look at the scope screen.

Regards Itsu