Self running coil?

[gotoluc]

That is not how I understand Luc's description.  He said, 3vdc is feeding the mosfet, and it was able to self-oscillate to any frequency between 5KHz to 50KHz WITHOUT the use of capacitors.  He didn't say anything about changing the voltage feeding the mosfet in order to change the capacitance for a given resonate frequency.  If he's not changing the voltage, then it can only happen if the two coils have the proper relationship in their inductances and the capacitance of the mosfet is changing with the frequency. Please correct me if I am wrong, Luc.

If you change the frequency, then the capacitance must also change accordingly in order to be in resonance.  Their is only one frequency where the capacitance reactance and inductive reactance are equal.  If the frequency changes, then the capacitance must be changed also, in order to be in resonance.

Thanks,

GB

Hi GB,

correct the voltage is fixed at 3vdc. The pulse coil is any coil you want to use but it must have a ferrite core. I used a shaded pole motor coil and was just sliding a long ferrite rod in or out to vary the inductance. For the main toroid I have a large 1" cube neo magnet that is fixed and about 1" away from the toroid which I slide in and out to change its inductance.

We would appreciate you not jump the gun and make conclusions of what others or myself maybe doing. Think about it. If I wanted to hold back information do you think I would say in my post that someone is looking over the data

I've attached the sample scope shots so you or anyone can look at them if interested. I sent it to an individual who offered to help in order to find a simple formula for interested replicators.

At this time I have too many things on my plate. So I will not answer questions related to these scope shots. The details are in the Title of each scope shot. So if you can figure out a table of some kind or create a Java calculator program them please share what you can do to help.

As you say, this is a group effort and I am a strong believer of that principal if you know me or my way of life and past public forum sharing history.

Thanks for sharing.

Luc

[gotoluc]

Based on what I've seen of gotoluc I think you are totally wrong in that assumption.  He has a very caring and very open source save-the-world mindset.  If anything he simply wants to verify things so he does not mislead anyone into wasting time or money on something that may not give results they want.

Thanks e2matrix

you know me well and thanks for bringing this important point up. I hate waste! that's why I keep picking up microwaves, crt monitors from the garbage and try to strip all the stuff I can reuse instead of filling dumps and buying new. I would hate to see a hole bunch of replicators buy new stuff for something that is not proven yet. Give me more time and I'll give you a list with all parts and details if this really works. If you can't wait another 5 days or so then don't blame me for parts you bought for nothing

Luc

[gotoluc]

@gotoluc

Just wanted to confirm the inductance using my dual bucking toroid.
Lot's of fun with this one.

Inductance is only useful when it gets disconnected.
Capacitance is only useful when it is connected.
Both can pitch and catch, so more inductance like you show is preferable especially in the Ozone Mode where inductance plays a major role.

I wonder if the mosfet was inline between the two coils, connecting and disconnecting what would happen??

Thanks wattsup for posting and sharing your findings here

Luc

[NextGen67]

That is not how I understand Luc's description.  <...>

If you change the frequency, then the capacitance must also change accordingly in order to be in resonance.  Their is only one frequency where the capacitance reactance and inductive reactance are equal.  If the frequency changes, then the capacitance must be changed also, in order to be in resonance.

Thanks,

GB

Hi gravityblock,

I might have expressed myself not clearly.

I mean we can keep the mosfet Capacitance the same [at 3V DC in Luc's example], and still be able to choose any desired frequency [within limits].

By variation of the coil inductance instead, we can chose any frequency *without* changing the capacitance.

Edit: It might be clear that with ' *without* changing the capacitance ', I mean the capacitance of the mosfet it's C's during a full cycle... I don't talk in terms of 'in the progess of switching on and off'.

--
NextGen67

[gravityblock]

@Luc:

Thanks for posting the data.  Isn't it based on the standard formula as shown below.  I'll work on a resonance calculator.

Here's the formula:

F_r = .159 / square root of LC

F_r = the resonant frequency in hertz
L = the inductance in henries
C = the capacitance in farads

I really do appreciate your work,  I apologize for being hard on you (it was uncalled for).

GB