new oscillator circuit shared By Nelson Rocha

Matt Watts

Re: new oscillator circuit shared By Nelson Rocha
« Reply #200,  »
Quote from evostars on October 26th, 03:49 PM
that 460 can handle 20A!
You'd be surprised how many amps you can get out of small electrolytic capacitor.  Not continuous of course, but a surge.  One hundred amps from a 3300uF cap is nothing.  Seems like the leads would blow off, but they don't.

evostars

Re: new oscillator circuit shared By Nelson Rocha
« Reply #201,  »
Quote from Matt Watts on October 26th, 03:53 PM
You'd be surprised how many amps you can get out of small electrolytic capacitor.  Not continuous of course, but a surge.  One hundred amps from a 3300uF cap is nothing.  Seems like the leads would blow off, but they don't.
the faster the discharge the more amps is what Steinmetz said.
and faster means less resistance

Matt Watts

Re: new oscillator circuit shared By Nelson Rocha
« Reply #202,  »
Quote from evostars on October 26th, 03:57 PM
the faster the discharge the more amps is what Steinmetz said.
and faster means less resistance
Yeap.  At the closing of a capacitive discharge, the current is off the charts.


Meant to show you this little baby I built a couple years back.  It's a switching monster for this kind of stuff.

 Switch-Baby.png - 983.93 kB, 1188x570, viewed 18 times.


evostars

Re: new oscillator circuit shared By Nelson Rocha
« Reply #203,  »
Quote from Matt Watts on October 26th, 04:01 PM
Yeap.  At the closing of a capacitive discharge, the current is off the charts.


Meant to show you this little baby I built a couple years back.  It's a switching monster for this kind of stuff.
Thats a cute baby :)
Re: new oscillator circuit shared By Nelson Rocha
« Reply #204,  »
played with C2 and C3. Big values had a big amp draw, and gave a lot of ringing.
So In this test I made it 1nF for both c2 and c3.
C4=2.3uF like Nelson has.
C5=30nF (3x10nF in parallel)
F=32.81kHz
power supply: 0.37A V=11.8V
111 Ohm load is connected to L3

L3 is in the middle of the stack. coils are separated by tape rolls (15mm) L1 is bottom and L2 is top distance between L1 and L3 is 2x15mm + L3(=10mm)= 40mm (maybe L3 should be closely coupled to L2? )

Both probes 10:1 blue is between C4 and L2 yellow is between C5 and L2
Blue negative spike is NOT at the mosfet turn off, but right before the mosfet turns on

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Re: new oscillator circuit shared By Nelson Rocha
« Reply #205,  »
then new oscillator I build works fine. but the small precision trimpots are very anoying... since I now know it works fine in top if the inductive spike if L1, I ordered a dc to dc converter to connect my trusted pulse generator to the the circuit so I can tune easier again.

I was planning on increasing C3 but... I have never seen a change do anything....

Still wonder how that inductive spike from L1 can disappear, and instead give a spike right before the mosfet turns on. So weird
Re: new oscillator circuit shared By Nelson Rocha
« Reply #206,  »
c1 size doesn't matter as the powersupply has a large cap parallel to it
Re: new oscillator circuit shared By Nelson Rocha
« Reply #207,  »
c3 doesn't do anything diffent when I change it... nothing at all. It just charges up and stays charged. Those diodes dont open up.

1nF cap for C2 gives the delayed spike, which gives a small bumb in the L2 coil on the minimum voltage valley.

I feel like tuning, C5 and see if something happens... 
Re: new oscillator circuit shared By Nelson Rocha
« Reply #208,  »
increased C4 to 52nF F is now 25kHz
current draw is much higher. not good 0.9 Amps.. but also wioth load. will take it off, and see if current drops with l2

 discharge in L1 is again delayed, to just before the mosfet turns on again.
Re: new oscillator circuit shared By Nelson Rocha
« Reply #209,  »
Without load, L2 does bring the current down. When its not on top current is 0.21A when it is placed on top of L3+L1 the current drops to 0.06A
frequnecy is 25.8kHz (added a 1nf in parallel with the 1nF of the 555, to get lower range)

The discharge in L1 also changes. it is now ringing without the load on L3. I will retune again.
Re: new oscillator circuit shared By Nelson Rocha
« Reply #210,  »
retuned. noting special

Did notice L2 has a perfect distance somewhere, where the current drops to the lowest. But probably also because it detunes.
L3 still open with no load or cap
Re: new oscillator circuit shared By Nelson Rocha
« Reply #211,  »
did a distance test. L2 seems to like a certain distance form L1 where the current drops to the lowest. Nelson mentioned this. Will have to take a note and keep it there
distance between L1 and L2
« Reply #212,  »
distance seemed best (lowest current draw) when its about 54mm between L1 and L2 (with L3 inbetween) since I now have it at 50mm and it doesnt differ much, ill keep it like this.

now it seems time for more boring repetition experimentation with C2. make a table with different values. and see what it does after retuning (if needed).

I'll do it with the load on. for now its a 111 ohm resistor (from heater).
I guess I'll also have to measure current and see if it increases

Re: new oscillator circuit shared By Nelson Rocha
« Reply #213,  »
bought a 2A 5V buck converter to drive my old trusted  pulse generator (with memory) for only 2 euro.
and it works.
back to easy tuning

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Re: new oscillator circuit shared By Nelson Rocha
« Reply #214,  »
thats so much better now I can tune again with a proper knob instead if a tiny screw driver
Re: new oscillator circuit shared By Nelson Rocha
« Reply #215,  »
I can't seem to get the discharge as seen in my previous video.

By now I'm pretty sure c3 and c4 have  same function. they charge up with the back emf, and provide the series resonance of L2 c5 with a ground.
That ground has a positive offset of a several hundred volts positive.

So L2/C5 series resonance is grounded on C4/c3 that provides a positive offset ground.
The diodes keep it that way.

Why doesn't C4 discharge over the series resonant L2 C2 (when mosfet conducts)? Is it because C2 blocks the dc?

pff to much info.
would like to do a lot more tests with c2.  or remove the resistance from l3 and tune l3 with a cap. as thats how I first saw the discharge in l2 (as shown  in my last youtube video)
break time
« Reply #216,  »
Break time
c5 is disruptive discharged, c2 can be parallel to whole of L1
« Reply #217,  »
I thought c5 tuned the series resonance. but its not.

its the cap that is disruptive discharged when the mosfet starts conducting again.

L2 sees this discharge of c5 and shows the spike that is needed for the radiant energy effect.

c2 can be parallel over the complete L1 coil if voltages higher that 12V are used. Its all a matter of tuning.
using the body diode
« Reply #218,  »Last edited
Did a new test based on using the body diode.
Intention was to open it up through resonance of c2 and L1. positive voltage would charge C5 and C1.

C1=33nf c2=10nF c3=635nF C4=2.3uF c5=54nF
L3 is in the center of the stack, unloaded untuned, open. L1 is 15mm distance from L3 and L2 is on l3 tight coupled.
0.89A 12.1Vdc 
F=48.254 kHz

Blue probe 10:1 between c5 and L2
yellow probe,10:1 on source of mosfet

notice, the yellow probe (source) is having a "posiitve"  bump on top...
Right now I can even see where the mosfet turns on and off again...

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Radomir

Re: new oscillator circuit shared By Nelson Rocha
« Reply #219,  »
Try this circuit and attach L2 and L3.


evostars

Re: new oscillator circuit shared By Nelson Rocha
« Reply #220,  »
Tnx  Radomir. but for now I got something that works.

Did a new test with the same settings:
C1=33nf c2=10nF c3=635nF C4=2.3uF c5=54nF
L3 is in the center of the stack, unloaded untuned, open. L1 is 15mm distance from L3 and L2 is on l3 tight coupled.
0.54A 12.2Vdc

this time I looked at the junction of D3 C1 and C5, this is shown by the yellow trace 10:1
Blu trace is C5/L2 10:1

As you can see the yellow has a positive bump of 95V. This is from the body diode opening up. due to the positive resonance of C2 L1.

Blue shows, that same voltage shows up on L2. Very interesting. need further tuning.

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GOT THE SPIKE
« Reply #221,  »
I removed C1 from the circuit. and added 111 Ohm load to L3 with 100mV/A setting
 C2=10nF C3=635nF C4=2.3uF C5=44nF

newfile7:
Power supply 0.66A 12.2Vdc
F=72.254
blue is source 10:1
yellow is C5/L2 10:1  Spike is @ turnoff of the mosfet

newfile8: Same, but only now blue is at D3 C5 junction

Newfile 9, tuned up the frequency for maximum spike
F=102.254kHz
0.44A 12.2Vdc
Blue = current probe on 111 ohm load of L3 100mV/A setting shows 0.5A

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Radomir

Re: new oscillator circuit shared By Nelson Rocha
« Reply #222,  »Last edited
Hello Evo

Nice advance from you !

I am sure that generating very sharp nanopulse effect wich Nelson shown us is due to the ДДРВ (DSRD = Drift step recovery diode effect) discovered 1970 in Physical Institute named P.N. Lebedev in USSR by Dr. G.A. Mesyac. Key words : Dsrd, drift step recovery.

You can download his book here:
https://eknigi.org/nauka_i_ucheba/144320-formirovanie-nanosekundnyx-impulsov-vysokogo.html

Also new works by Prohorenko and Korsun (translated in english)
http://erewhon.superkuh.com/library/Electronics/SRD_SOS_DOS_DRSD_Avalanche/Drift%20Step%20Recovery%20Devices%20Utilization%20for%20Electromagnetic%20Pulse%20Radiation_%20V%20Prokhorenko_%20V%20Ivashchuk_%20S%20Korsun_%202004.pdf

Also the wrok of Michael John Chudobiak, B.Sc. from Department of Electronics Carleton University, Ottawa, Canada
New Approaches For Designing High Voltage, High Current Silicon Step Recovery Diodes for Pulse Sharpening Applications
https://docviewer.yandex.ru/view/0/source?url=http%3A%2F%2Fwww.avtechpulse.com%2Fpapers%2Fthesis.pdf&ts=166f32babe4&token=9Ovqb5onpbIaJwJg6vGdcg%3D%3D&name=thesis.pdf&dsid=3a03a2a0b95343df6c001435215ff42d

ps: Interesting is tha effect better works with older step recovery diodes, and older mosfets body diode.

ps2: Edward Lee Dally has used dsrd effect 2012 in his BTG (Free Energy Generator)
His blog: www.liveinternet.ru/users/edward_lee

evostars

Re: new oscillator circuit shared By Nelson Rocha
« Reply #223,  »
Thanks for sharing Radomir!
Thats interesting.
can you describe in short what the effect is/does?
Re: new oscillator circuit shared By Nelson Rocha
« Reply #224,  »
Quote from Radomir on November 8th, 04:19 AM
ps: Interesting is tha effect better works with older step recovery diodes, and older mosfets body diode.
Would you know which older mosfets? A type number would be very helpfull