Testing the TK Tar Baby

[ReFried]

Greetings All,

I've been following this thread since its beginning.  I've signed up for an account here so that I could offer my thanks and admiration for this thread and topic. A special shout out to TK whose videos and explanations even I can understand. I've learned a great deal, though I've been required to stop and start the videos from time to time and sometimes go back and Google something.  The Open Source model is being demonstrated here in all of its colorful glory. Thanks to all the participants.

I can't really add a lot to the technical discussion as I am merely keeping up. That said, I can add something topical which I believe many of you may appreciate. It's science, just not very electronic.

Two words and a YouTube link:  Dunning - Kruger

http://www.youtube.com/watch?v=XyOHJa5Vj5Y

Tar Baby Rulz ...

ReFried

[poynt99]

PW,

This is for you, as requested.

Note; I did not add any inductance. It oscillates nicely with the filtering across all the batteries.

Also note that 3.3W x 4 = 13.2W, precisely the same value obtained by using the power probe on one battery and multiplying by 6x.

[TinselKoala]

Poynt:

I just noticed those new simulations and the how the addition of the filtering switches the battery power calculation over.  Very impressive!

TK:

I just saw your clip demoing the CVR voltage change and I will share some thoughts with you.

Let's assume that wire impedance at the operating frequency + harmonics and other capacitive/inductive effects mean that the whole setup is like a slinky festival in a mosh pit.

So, you really need to define a "home base."  Let's call the negative terminal of the lowest battery in the totem pole your home base.  I would move your CVR off of the circuit board and solder it to the negative battery post.  This is not going to change the replication and Rosie has no argument about this not being a replication because of this.

So in theory your returning current will be viewed between the negative battery post and the CVR.  It's unlikely that you will see dramatic changes in the voltage across the CVR with this setup.

Now here is the key:  Needless to say your second channel will use the same negative battery post for the probe ground.  Now your second channel signal probe can "go off on an adventure" to see what the rest of the circuit looks like relative to "home base," the negative battery terminal.   Even if you have to add a longer length to the ground clip lead to make measurements that are far away from the battery post, stick with the "home base" philosophy.

So you can imagine "snaking" your second channel probe through the rest of the circuit, where you look at the potentials every three or four inches of wire length.  You will probably find that your whole circuit board and load resistor setup is "bouncing up and down" relative to your home base.

Once you get a feel for how the CVR voltage is behaving then you can disconnect that channel from the CVR and "send that scope probe out on an adventure" also.  So you can have two channels on your scope tied to your "home base" master reference ground point while you examine the "bouncing" going on at different points in the circuit.

Notice that if you line up the ground references for each channel of your scope, and have the gain for each scope channel the same, you will get a live visual display of the differential potential with respect to time between any two points in the circuit.

With enough interactive probing of the whole setup, you should be able to get a feel for how the major parts of the circuit are fluctuating in potential with respect to home base, i.e.; the slinky fest in a mosh pit.

Also note that if you do this measurement setup it makes adding capacitive decoupling to the bottom-most battery quite simple and elegant.  You are just a step away from measuring the current and the capacitively-decoupled potential across that single battery in order to measure how much power is being output by that single battery.

MileHigh

P.S.:  It may be worth it to strip off some wire insulation as needed in order to see what is going on as your probes snake their way away from home base.

Bumped to the front so I don't have to search back through post after post of Ains-lies.

Her typical tactic is in use again: whenever there's an important point raised she goes off on post after post of misrepresentation, misinterpretation and outright lying in order to deflect discussion from the true issues.

Refutations of her points don't matter...she simply ignores them, UNTIL, as at present, her advisors at her elbow tell her that we here are right, and then she's got to start spinning and trying to change the meaning of her own previous posts.

What is the "IsoTech GFG 324" function generator? I would like to see a link to some internet information about this unit.

[TinselKoala]

PW,

This is for you, as requested.

60 uf sounds more like it. One or 5 helps but there is still noticeable ripple.  But I can only get to about 40 uF with all my blue RIFAs.

[picowatt]

Greetings All,

I've been following this thread since its beginning.  I've signed up for an account here so that I could offer my thanks and admiration for this thread and topic. A special shout out to TK whose videos and explanations even I can understand. I've learned a great deal, though I've been required to stop and start the videos from time to time and sometimes go back and Google something.  The Open Source model is being demonstrated here in all of its colorful glory. Thanks to all the participants.

I can't really add a lot to the technical discussion as I am merely keeping up. That said, I can add something topical which I believe many of you may appreciate. It's science, just not very electronic.

Two words and a YouTube link:  Dunning - Kruger

http://www.youtube.com/watch?v=XyOHJa5Vj5Y

Tar Baby Rulz ...

ReFried

ReFried,

I got a good chuckle over how he ended the video... "two words"

Feel free to ask questions if you have any, I am sure most here would try to provide you an anwer.

PW