STEORN DEMO LIVE & STREAM in Dublin, December 15th, 10 AM

[broli]

Looks like I have been missing a bit of work that has been going on here. First of all omnibus

GOOD JOB

I don't care if the transformer is OU. But you have set an example of how this community should operate. Professional experimentation and sharing without making a joke or puzzle game about it. We need many more posts like these. I see you are getting some slack but these people don't understand how much work is needed to even get this far. All you hear is their bullshit and no contribution. Either you contribute or you back off idiots!

Anyway keep up the good work man you have my respect however little that's worth.

[Omnibus]

Thanks a lot @broli. Your words mean a lot to me. It's good to see someone who understands and appreciates the importance of careful studies and openness.

[Omega_0]

Omnibus,

I saw the data, these are my observations:
The current goes from -1.5A to 1A peak (slight offset)
Voltage goes from -9.6V to 9V (again some offset)

Now, at 1 Hz, there is no inductive effect, only resistive, so I'd expect it to follow ohm's law. The R is Rin+Rc = 63 ohms approx, and this gives a peak value of 9.6/63 = 0.15 A

So you see there can be some possible reasons-
- the coil is drawing 10x times current somehow, and not following ohm's law
- or your probe is set at 10x,
- or the scope is multiplying the current value by 10x internally
- or the Rc is actually 6.3 ohm (Btw, when you plug this value in excel, the Ein becomes exactly equal to Eout)

I'm only trying to eliminate errors here, not saying that there cannot be an anomaly. I'm hoping for OU to be there. So if you don't mind can you please double check the values and scope/probe settings. And also replace the coil with a simple resistor of value around 63(say 100 ohm) and capture the data again?

If it can show this behavior at 1 Hz, it will show it on 0 Hz (DC) also, so that can be one test.

[Omnibus]

@Omega_0,

- the coil is drawing 10x times current somehow, and not following ohm's law
- or your probe is set at 10x,
- or the scope is multiplying the current value by 10x internally
- or the Rc is actually 6.3 ohm (Btw, when you plug this value in excel, the Ein becomes exactly equal to Eout)

First off, I wouldn't expect the coil to follow Ohm's law if the effect is real. I think we're in agreement on that.

Probes are set at 1X, I double checked.

On the side of the scope the probes are st to 1X also. I double checked that too.

Rcoil is measured with the Keithley 2000 in 4-point mode--the 63Ohm value is correct.

I did the simple resistance test and also did some soldering in the transformer test, having in mind the importance of Rin. The simple resistor test shows OU at 1Hz as well. Please, bear with me, because I'd like to repeat the transformer test before sending you the data.

[IceStorm]

@Omega_0,

First off, I wouldn't expect the coil to follow Ohm's law if the effect is real. I think we're in agreement on that.

Probes are set at 1X, I double checked.

On the side of the scope the probes are st to 1X also. I double checked that too.

Rcoil is measured with the Keithley 2000 in 4-point mode--the 63Ohm value is correct.

I did the simple resistance test and also did some soldering in the transformer test, having in mind the importance of Rin. The simple resistor test shows OU at 1Hz as well. Please, bear with me, because I'd like to repeat the transformer test before sending you the data.

You forgot to multiply by 100 the result of what you got across your 0.001 resistor, its why you get 10 time more, Omega_0 was right.