Testing the TK Tar Baby

[TinselKoala]

I just watched your "function generator offset explained" clip.  That's one hell of a function generator!  John Hutchison must be envious.

Not a touch screen, floppy drive, or USB port in sight.   Ahhh....

Interstate Rules !! I actually have two, the F43 High Voltage model with step calibrator here, and in another place I have the F34 Sweep Function Generator, which has frequency sweep capability... very cool.
They are all big-trace circuit boards, discrete components and a few op-amps and logic chips, very easy to maintain if needed. Don't drop one on your foot, though !

[TinselKoala]

I think the time is nigh for the Big Question: How is Tar Baby different, in any significant way, from Rosemary Ainslie's NERD device described in the papers? Just what factor keeps Tar Baby from being an actual replication of the NERD device?

It can't _really_ be the white pegboard, can it?

[TinselKoala]

Load is at 124 degrees F, inline ammeter says 230 mA, nice oscillations on the Q2s, Q1 inactive but present, and NO FUNCTION GENERATOR, just the 555 timer making the pulses.
The duty cycle has changed a bit as the components have aged, but everything else is stable and getting warmer.

Oh yes... open-circuit battery voltage is now 35.3 volts.



So.... that's how Tar Baby is different. Its batteries run down while heating up the load....... awwwwwwwww dammit.

[picowatt]

Well, there have been a few other tests and explorations performed; and they are up in the usual place. Please check them out if you haven't already.

Here is an interesting one, with a little surprise at the end. No, nobody is going to scare you...unless you have a mosfet phobia. Some people do, I understand, which prevents them from understanding how they work.

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


Meanwhile, I've decided to make public my NERD RAT Test Prevention technology. This is how I am able to manage to prevent the NERD RATs (although I think there's only just the big old scrawny one left) from testing their battery capacity all the way on the other side of the planet.

You see, it's vital that they be prevented from proving their claims, and I know that I can't possibly do it by forum posts alone, so I've developed the Tesla longitudinal scalar quantum frequency wave linecaster and programmed it with frequencies that will turn the NERD RATs minds to mush. What's not mush already, I mean. In this manner, as long as I have the unit powered up and in the correct mode, the entire southern tip of Africa will be blanketed by the linecast and nobody there will be able to do any battery drawdown tests at all.

http://www.youtube.com/watch?v=LZQ498owHYE

TK,

I only have a minute, but nice videos!  I have not laughed that hard in some time watching the second one.

You better include a disclaimer stating that no stuffed critters were injured in the making of that video..

Now, I have some testing to do here, so could you please turn that thing off or point it the other way?


PW

[TinselKoala]

@PW: Thanks !! I'm glad you got a chuckle out of it. Many of the alt.snakeoil Video Reports have a similar...er... irreverent quality about them.
Don't worry, I think you are probably immune to Tesla longitudinal scalar quantum frequency linecasts. But just in case... better put on your foil hat (and underwear) as a precaution. Sidebands, you know.

Meanwhile.... I went ahead and trusted my remaining PG50s to the 555 driver.

Scope shot showing 555 timer pulses and drain trace, using 4 x IRFPG50 mosfets in the Q2 positions. Since the timer makes a positive pulse, to get the circuit to see it as a negative pulse... required swapping the little red thing for the little black thing, and vicey-versey.

It is confirmed that I am oscillating Q2s and leaving Q1 off. The Q2s are slightly warm and the Q1 is stone cold, and the circuit is carrying 200mA at least, by the inline DMM, and the load is maintaining 120 F. Touching the Q2 wiring or heatsinks causes the oscillations to change or go away but they are trivial to restore. The hot 555 timer adds some distortion to the overall waveform but with careful settings on the 555's input DC power you can get to the "classic" RA oscillation envelope as shown below.

Top is the pin 3 output from the 555 at 5 v/div, (also shows that "voltage floor" phenomenon), bottom is the common drains at 20 V/div, timebase at 0.5 ms/div.