Hi itsu, The frequency shift you observe is due changing inter-winding capacitance when you squeeze coil. So the LC resonance changes due this factor. The resonance which should be looked at is by wave length which does not relate to LC resonance. The grenade coil is meant to be signal receiver where signal go by longitudinal waves(not transverse used in radio). Good luck!
+T1000LTU Thanks, these longitudinal waves are a pain, as nobody can detect them, so how to know they are there. Also strange is that we need to have the kacher on a 3th or 4th of the grenade frequency, but what grenade frequency, the longitudinal wave or the LC wave?? Itsu
+itsusable The 3rth or 4th frequency is determined by the wire length of grenade coil and not by LC frequency.. Thinking outside of the box - there are clues what Dally/Ruslan intention was by these pulses: to disrupt magnetic coupling between inductor and output part of grenade coil with the strong EM pulse. Which should make magnetic field move in order to make induction in bifilar coil with opposite windings. And with that coil configuration the power source won't "see" the load.
Its, I think that the issue here is: (1) that your Kacher is not in resonance - you should have a high voltage sinus wave that matches the same resonant frequency as the yoke. (2) once you have the same resonant sine wave on the Kacher you have to use the PLL to synchronize with the current of the series LC circuit on the yoke. The high current potential of the yoke will prop up the voltage of the Kacher. The two sine waves need to be phase locked perfectly. Extracting the voltage and current potential of the two separate circuits can be achieved by using the bucking coil. The output to the bulbs should be connected using only inductive coupling and not by any direct connection to either resonant circuit. Send me a private message if you wish to discuss further. Chris
+endlessanalog Hello Chris, thanks for the reaction.(1) I don't think that a kacher can NOT be in resonance (only when powered off), afterall, it won't work when not in resonance. And a kacher that works on that low frequency as the yoke (15KHz in my case) needs many many turns if it will work at all, so i am not sure if that is what you mean. Regards Itsu
+itsusable Hi Itsu, What I mean is that when you look at the resonance sin wave of the Kacher on the scope it should look just like that of the yoke. The two sine waves should look identical and should line up perfectly using the PLL. The Kacher resonance I observed in your latest video is ringing down and the sinus does not match that of the yoke. I hope that makes sense.
+endlessanalog Chris,what you see in that latest video PLL 9, and specifically the last part is the 15KHz sine wave of the yoke (yellow trace) and ontop the 886KHz kacher signal (red trace) which is pulsed at a 15KHz repetition frequency only for a few nanoseconds (400) so to be only active ontop (or bottom) of the peak of the sine wave of the yoke. This pulsing (pulsing the gate of the Kacher MOSFET) is causing this ringing down of the sine wave of the kacher. I too would prefer it to stop directly after the gate signal is gone, but it does not, it rings down. To my understanding of this Ruslan circuit, the PLL is only used to keep the yokes frequency stable at the resonance frequency of the inductor/cap (15KHz), but as i understand PLL systems, in this case it has no circuitry to be able to "lock on resonance", it only locks on a frequency and that is what i am seeing. When shifting the resonance frequency because of a load or so, it does not track / lock on it. To be able to "lock on resonance", it should, in my opinion, have to have a peak detector or so (resonance = max amplitude). I will be leaving this PLL system and go back to a manual resonance tracking system via a potmeter. Thanks, Itsu
Hi itsu,
The frequency shift you observe is due changing inter-winding capacitance when you squeeze coil.
So the LC resonance changes due this factor. The resonance which should be looked at is by wave length which does not relate to LC resonance. The grenade coil is meant to be signal receiver where signal go by longitudinal waves(not transverse used in radio).
Good luck!
+T1000LTU Thanks, these longitudinal waves are a pain, as nobody can detect them, so how to know they are there. Also strange is that we need to have the kacher on a 3th or 4th of the grenade frequency, but what grenade frequency, the longitudinal wave or the LC wave?? Itsu
+itsusable The 3rth or 4th frequency is determined by the wire length of grenade coil and not by LC frequency.. Thinking outside of the box - there are clues what Dally/Ruslan intention was by these pulses: to disrupt magnetic coupling between inductor and output part of grenade coil with the strong EM pulse. Which should make magnetic field move in order to make induction in bifilar coil with opposite windings. And with that coil configuration the power source won't "see" the load.
Its, I think that the issue here is: (1) that your Kacher is not in resonance - you should have a high voltage sinus wave that matches the same resonant frequency as the yoke. (2) once you have the same resonant sine wave on the Kacher you have to use the PLL to synchronize with the current of the series LC circuit on the yoke. The high current potential of the yoke will prop up the voltage of the Kacher. The two sine waves need to be phase locked perfectly. Extracting the voltage and current potential of the two separate circuits can be achieved by using the bucking coil. The output to the bulbs should be connected using only inductive coupling and not by any direct connection to either resonant circuit. Send me a private message if you wish to discuss further. Chris
+endlessanalog Hello Chris, thanks for the reaction.(1) I don't think that a kacher can NOT be in resonance (only when powered off), afterall, it won't work when not in resonance. And a kacher that works on that low frequency as the yoke (15KHz in my case) needs many many turns if it will work at all, so i am not sure if that is what you mean. Regards Itsu
+itsusable Hi Itsu, What I mean is that when you look at the resonance sin wave of the Kacher on the scope it should look just like that of the yoke. The two sine waves should look identical and should line up perfectly using the PLL. The Kacher resonance I observed in your latest video is ringing down and the sinus does not match that of the yoke. I hope that makes sense.
+endlessanalog Chris,what you see in that latest video PLL 9, and specifically the last part is the 15KHz sine wave of the yoke (yellow trace) and ontop the 886KHz kacher signal (red trace) which is pulsed at a 15KHz repetition frequency only for a few nanoseconds (400) so to be only active ontop (or bottom) of the peak of the sine wave of the yoke. This pulsing (pulsing the gate of the Kacher MOSFET) is causing this ringing down of the sine wave of the kacher.
I too would prefer it to stop directly after the gate signal is gone, but it does not, it rings down. To my understanding of this Ruslan circuit, the PLL is only used to keep the yokes frequency stable at the resonance frequency of the inductor/cap (15KHz),
but as i understand PLL systems, in this case it has no circuitry to be able to "lock on resonance", it only locks on a frequency and that is what i am seeing.
When shifting the resonance frequency because of a load or so, it does not track / lock on it. To be able to "lock on resonance", it should, in my opinion, have to have a peak detector or so (resonance = max amplitude). I will be leaving this PLL system and go back to a manual resonance tracking system via a potmeter.
Thanks, Itsu
Keep up the fight, nice work Itsu:)