unipolar Tx

[green]

I've been playing with moodz CC bipolar and a standard bipolar Tx circuit lately. Bipolar should be better, especially like moodz CC circuit. Longer Tx on time reduces signal subtracted from target sample. Bipolar doesn't need EF sample. But so far I haven't been able to get bipolar Tx to be better than my unipolar Tx. Charted change in integrator out vs target(US nickel) distance for my latest unipolar circuit which I added a 7V Tx supply so signal what remain constant as PS volts droops from 12V to 8V. I tried charting a 200mm fig8 coil that I'm working on. Data not as good as it should be. Coil needs shielding, added poster board sheet painted with graphite over the coil when I tried but it wasn't good enough.

Something to compare the bipolar circuits against if I can get one working the way I would like. Charted integrator volts out vs distance instead of a visual or audio indication detection vs distance to minimize noise effect, DVM averages signal. Target is stationary, not effected by how I move it.

[dbanner]

Your assumption that bipolar doesn't require ef sample is Ill founded .

[dbanner]

There's something else going on. Perhaps quantum mechanics can resolve it.
Now before I'm dismissed as some idiot, here me out.

[dbanner]

The wave theory predicts super position. We experimentors deal with empirical data.
So the logical conclusion is that there are forces, which however small, cannot be measured or quantified from the point of view of the observer.
The equations break down.
We enter into the domain of magic.

[green]

Your assumption that bipolar doesn't require ef sample is Ill founded .

You are correct. It does, just doesn't require a target and a separate EF sample. Each sample is a target and EF sample.

[green]

But so far I haven't been able to get bipolar Tx to be better than my unipolar Tx. from #1

Charted standard bipolar and unipolar with 133mm Rx. Bipolar charts higher signal strength at integrator out. Used same coil and amplifier for both tests, integrator gains the same(bipolar looks maybe a little more noise)not sure the integrators use the same value capacitors. Both Tx use 7V supplies(160us Tx., 5us delay and 10us sample) Reason I think the unipolar might be better, ferrite core has less effect but don't know what effect the ferrite should have. Don't know why end B of the figure8 Rx is effected more than end A.

[green]

Still wondering about ferrite core signal. Charted change in integrator out(ferrite core, no ferrite core)log log and linear log. Charts closer to straight line decay, log log. Maybe if sample time were shorter it would be straight line log log? Slope lot steeper than ground slope. Don't know if I'm charting real decay or something else. Any thoughts or maybe someone knows what a ferrite core should chart?

[green]

Still wondering about ferrite core signal. Charted change in integrator out(ferrite core, no ferrite core)log log and linear log. Charts closer to straight line decay, log log. Maybe if sample time were shorter it would be straight line log log? Slope lot steeper than ground slope. Don't know if I'm charting real decay or something else. Any thoughts or maybe someone knows what a ferrite core should chart?

More charts including California ground. Ground slope charts steeper if charted at amplifier out.

[green]

See one mistake I made when charting unipolar Tx7.png. Charted delay time, integrator out signal is the average between delay time and delay time + sample time(5.2us). Ground signal is straight line decay log log so (delay time)+(sample time/2)wouldn't be correct. Ground charts closer to charting amplifier out if I add 2us. Anyone know a formula to calculate the correct time to add?

[Carl-NC]

I think I understand your pulse width is 5.2us and you want to figure out the average to use for a point on the graph. Since it's logarithmic maybe a geometric mean gets you there.

[green]

I think I understand your pulse width is 5.2us and you want to figure out the average to use for a point on the graph. Since it's logarithmic maybe a geometric mean gets you there.

Thanks, I'll give it a try.

[green]

Thanks, I'll give it a try.

Couple charts. Charted the 45mm film canister of California ground and a 1qt zip lock bag of California ground to get enough signal to chart amplifier out to compare with integrator out. Used geometric mean for the X scale(integrator out). Looks good.

delay time_5, 10, 15, 20, 25 and 30us. sample time_5.2us

I see I labeled Rx wrong. 133mm not 33mm

The three slope lines on the charts cross 1 decade at 1 and 6us. I think that is a -1.29 slope?

[green]

Charted some ferrite. Ferrite core toroid, and 6ceramic hobby magnets stacked to increase the signal. Didn't know what to expect. Don't understand what I'm seeing with the magnets. What is happening to cause the signal to stay constant as the delay is increased when the stack is laying down? Also why is the stacked vertical signal opposite polarity? Charted signal(target signal-no target signal)

delay time, 5, 10, 15, 20, 25 and 30us. sample time, 5.2us. X axis, geometric mean.

[green]

I've been playing with moodz CC bipolar and a standard bipolar Tx circuit lately. Bipolar should be better, especially like moodz CC circuit. Longer Tx on time reduces signal subtracted from target sample. Bipolar doesn't need EF sample. But so far I haven't been able to get bipolar Tx to be better than my unipolar Tx. Charted change in integrator out vs target(US nickel) distance for my latest unipolar circuit which I added a 7V Tx supply so signal what remain constant as PS volts droops from 12V to 8V. I tried charting a 200mm fig8 coil that I'm working on. Data not as good as it should be. Coil needs shielding, added poster board sheet painted with graphite over the coil when I tried but it wasn't good enough.

Something to compare the bipolar circuits against if I can get one working the way I would like. Charted integrator volts out vs distance instead of a visual or audio indication detection vs distance to minimize noise effect, DVM averages signal. Target is stationary, not effected by how I move it.

Shielded 200mm fig8 coil with graphite. Added data to 133mm and 300mm chart.