Testing the TK Tar Baby

[Rosemary Ainslie]

Prove it.
Not in any of the scopeshots in your "papers" is a negative battery voltage shown during even the highest oscillations.

There is ample proof in our final test.  Take a look

Rosie

[Rosemary Ainslie]

OK... so here's a "correction" if indeed it is a correction. Note that the shape of the graph and the sign of the average power does not change, only the magnitude of the power level changes.

Any other problems?

LOL.  I'd say it does change.  Golly.  By a HUGE factor.

Rosie Posie

[TinselKoala]

Extra special non-inductive shunt resistors, wired so as to minimize overall inductance?

[Rosemary Ainslie]

Extra special non-inductive shunt resistors, wired so as to minimize overall inductance?

I have NEVER claimed to have non-inductive resistors.  Why would I bother?  We're not talking marginal values.  There's nothing that can't manage a generous error margin and STILL show the required evidence. 

Rosie Posie
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[TinselKoala]

TK,

You are indeed fast.  I wish we had a part number for Rosemary's CSR resistors so that their inductance could be confirmed.

You can see them in the photo I just posted, and I  know you have dozens just like them on your bench. And you can see how they are listed in the bill of materials. Would you not have  mentioned the fact that you used special noninductive resistors?

When you measured your CSR's inductance, did you measure them as paralleled or individually and then calculate their value?

Both. I thought I showed this in a video. I measured some known commercial inductors to establish the accuracy of my inductance meter and its lead inductances, and then I measured one out-of-circuit resistor, then I measured the stack in-circuit. The in-circuit measurement was under 2 microHenry and the calculated value based on the 7 microHenry individual resistor was 1.75 microHenry. I even showed the meter readings along a stack of series-wired 1 microHenry inductors to verify its accuracy at the bottom end. It's all in the video.

In all the video blowups, has anyone seen a manufacturer logo on Rosemary's CSR's?

No, they just appear to have the standard " 10W   1 U  J " marking, where the U is actually an omega, in a single line. Mine are marked "XICON W" on a second line of text.

You don't need such high wattage for the CSR, I'll bet you could live with 4 to 8 half-watt carbons paralleled.

PW

Yes, you could.