Claimed OU circuit of Rosemary Ainslie

[poynt99]

Glen,

If you like I will upload a second picture of my setup. One thing that changed when I altered the grounding was that the top probe is now hanging off the top resistor terminal. So it is now parallel to the resistor.

That is the setup I have now and which was used to produce the last set of data. The "induction theory" does not pose a problem in my setup so far

Instead of trying to invalidate my entire effort, you ought to be trying to validate your own data. I've given you several things to check and think about in that regard.

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[poynt99]

Grounding update for setup. Current configuration used to acquire last data set #5.

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[PaulLowrance]

Thanks for posting the photos, poynt99. I see a lot of capacitance there, especially in the resistive wire *wound* long load. Also, long wires = capacitance, for anyone who's studied antenna theory.

When you get a chance, can post a scope shot of these spikes you are considering as part of power across the *resistance* aspect of that load, including the time domain?

Such details could save a lot of people a lot of time. This kind of analysis of considering spikes on the components you have shown in the photo is difficult because most of the spikes consist of current traveling in the *parallel* capacitance, not the resistive component.

Thanks,
Paul

[Hoppy]

@ Poynt99

Good move on the star grounding but as Paul says, the interconnecting leads are too long . If you've got crimped croc clip leads as many of them are, then they need to be soldered. Better not to use croc clips at all IMO.

Hoppy

[poynt99]

Another improvement.

I only had one 6" croc lead there Hoppy, but have now eliminated that as well. I noticed a marked improvement by doubling up on the croc lead back to the shunt, so I've soldered a 3" piece of 12 AWG to the shunt -'ve and brought it out for connection to all 3 scope probe gnd leads.

As a side note, I believe Glen is using long croc leads all over the place, not to mention the long leads to his pots...nice for noise coupling indeed. 

See the attached photo. Also see the Drain and Shunt wave forms, both for mine (now with better grounding) and Glen's. It should be noted that my test frequency is 2.5kHz (close to original Ainslie test), while Glen is still working in the 500kHz range, at least in that photo.

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