Testing the TK Tar Baby

[fuzzytomcat]

Hi Tk,

If you go by the device schematic in Rosemary's BLOG site and two other locations that she claims is the wrong "Qray" whatever configuration .....

The shunt resistors R4, R5, R6 and R7 are shown to each have a inductance of 275nh

Cheers,
Fuzzy

[TinselKoala]

I did indeed.  My own scope has been sent for calibration certification.  It should have been returned last Thursday.  Now only to come next Thursday.  The guy who's working on it will explain all to me.  Then I'll let Poynty Point know.  And then he can let you know.

Rosemary

And when he does explain it to you... he will become another one of your former friends who now are classed as idiots in your mind ... because he will tell you the same thing PW has been telling you and you will deny it and claim that he doesn't know what he is talking about.

[picowatt]

TK,

Your figures corrected for the CSR inductance are getting close to going the "other way".  The fact that the oscillation is not a pure sine at 1.5MHz, i.e., it contains a lot of  harmonics, that reactance value at 1.5MHz may not be accurate as well, and would still be too low regarding those harmonics.

You might try making a measurement using a non-inductive or less-inductive CSR for a comparison.

It is a shame that the manufacturer and part numbers are not listed in the papers.


PW

[TinselKoala]

Hi Tk,

If you go by the device schematic in Rosemary's BLOG site and two other locations that she claims is the wrong "Qray" whatever configuration .....

The shunt resistors R4, R5, R6 and R7 are shown to each have a inductance of 275nh

Cheers,
Fuzzy

And just where did those figures come from? That is a sim, right? Designed to mimic the behavior of the circuit?

4 resistors in parallel with 275 nH inductance each should total about 69 nH, isn't it?

[picowatt]

FTC,

Deleted post, brainfade, it's getting late!

PW