Testing the TK Tar Baby

[TinselKoala]

TK:

With some of your recent experiments with the oscillations running (let's assume 'negative' power) you had an in-line digital ammeter and an in-line analog ammeter showing that there was a net DC current flowing out of the batteries.  Correct?

(snip)

Yes, that's right. The ultimate cheapo CenTech DMM, purchased on sale from Harbor Freight for 3 dollars each, battery included. I have 4 or 5 of them. The voltmeter was right on the battery terminals with the tiny clipleads, and the ammeter was in series with the negative supply lead with about 36 inches of wire total. The DC resistance of the ammeter is 1.8 ohms.

http://www.harborfreight.com/7-function-multimeter-98025.html

And the ammeter was calibrated against Ohm's Law with a known resistance and regulated DC voltages, as I showed in a video. But of course.... there is the RF component, and it does make these meters go crazy at times. Even in the latest videos where I get my fingers close to the voltage reading you can see it fluctuate... this is because of the RF.  I have a Fluke 83 that is less susceptible .... but I have lots of other stuff too. Who needs it? Why waste heavy artillery on soft targets?

And yes, I never saw a negative current reading. But I wasn't looking at it 100 percent of the time.... therefore aliens.

[TinselKoala]

PW,

Thanks for mentioning the Vbat video. TK, you should do a better job identifying your video links as to what they will show. 

I completely missed this video, as it was not labeled.

You mean the one that's "not" labelled "Electric OU: Oscillations measured at several places going upstream" ? OK, sorry, I'll try to do a better job.

Anyhow, it's good that you've confirmed some of my findings in the simulations TK. Now if you were to perform the average power computations with the Tek scope as you move along, you'll see a similar fall in negative power, then back up to a positive power.

Yes, that's right, and I'm not going to be doing that... on this oscilloscope... because it takes all day to do just one position. However.... there are other oscilloscopes in the world.

Exactly as I've shown in the detailed analysis6 document done 10 months ago. Here is a relevant excerpt (snip)

Exactly. And as I recall Rosemary agreed with you about that simulation and the results from it... all up to the point where you showed their error. Calling something an instantaneous power curve representing the true power in the circuit, when it's not... and claiming COP exceeding infinity because of that alone.... is a pretty big error indeed.

[picowatt]

PW,

Regarding "where you are going", I've done a detailed analysis on using "averaging" to obtain an easy accurate measurement of input battery power. You might be surprised by a couple things. From page 42 and 43 of the attached document:

.99,

Interesting, I'll find the time to read the full document and give it further thought.

Apparently, you too have also spent a great deal of time on all of this!

I'd still like to see some heavily decoupled measurements for comparison (which as proposed is similar to your optional non-invasive RC filtering at the meter, only done via the supply decoupling instead).

PW

[picowatt]

TK,

Your astrophoto rig???

PW

[TinselKoala]

@PW: Ah... a fellow amateur stargazer!
I have three telescopes. The first is a Meade ETX-125, a great little scope that was my first real telescope and my introduction to AP. It's at the other location and I haven't used it in a year, unfortunately.
Next there are the primary visual and AP instruments. The rich-field refractor is a William Optics Megrez 90 apochromat with a TeleVue field flattener/reducer which gives me about f/4.8 or so. Then there is the Celestron 9.25 inch EdgeHD aplanatic SCT, f/10, the true "yard cannon". Both these are used on the fine Celestron CGEM mount, which I can control from inside the house over the wireless LAN with a laptop out in the TK ObservaYurt. The mount is guided by the Orion "AAG" guide scope using Stark Labs PHD guide software. I put a simple pier in the yurt a couple months ago, but all those photos are taken from the CGEM tripod. For photography I use a Canon EOS 400D, and an Orion Parsec 8300M monochrome imager, with filters to construct the RGB images like that of NGC891. The planetary stuff is done with a Celestron NexImage webcam thingy and lots of advanced processing. Images are processed with Nebulosity (paid for in full),  DeepSkyStacker, RegiStax, PixInsightLE and the gimp, all free or shareware. PixInsightLE has 96-bit data paths and handles all astronomical image formats in full data resolution until the final jpegging for transport.

Now you know why I LOL whenever Rosie Poser comments about my poorly lit videos and shaky camera. The Rosette Nebula shot is well over four hours of exposure, for example. And most of those shots are taken from my backyard in the middle of San Antonio.