Testing the TK Tar Baby

[TinselKoala]

Tania Kosell (friend of Stella) says, "Hi."

Stella's napping right now, but I'll leave a note for her, that Tania checked in. We don't see a lot of her these days.... I think she's doing some deep undercover work and hasn't reported in in a while.

Thanks !!

[TinselKoala]

DigiKey: Three days from placing the order on the net, to receiving it in my mailbox. In Toronto, it sometimes was in my hands at 10 am the next morning, if I ordered by 2 pm. How they did that I will never understand. They must have their own UPS airplane, or set of flying reindeer or something.

I found the cap she needed in half a minute on the online catalog, found the exhange rate conversion, could have even placed the order for her. She'd have the cap by Wednesday, or Thursday at the latest. And she wouldn't have had to admit her ignorance to anyone.

But if she wants to spend three or four times as much on a useless (for her purposes) and more dangerous (in her intended usage) capacitor ... well, that is just part of the plotline, isn't it.

I agree, it sounds like a big, multisection oilfilled motor cap, since she calls it specifically an "AC" capacitor. But the capacitance rating seems high for that type of cap. But who knows what numbers she might have scrambled.

[picowatt]

She probably ordered something like this but with a higher VAC.

http://www.grainger.com/Grainger/DAYTON-Motor-Start-Capacitor-6FLV5?Pid=search

Note how the uF on start caps is typically specified as a range of capacitance similar to the numbers she stated.

[TinselKoala]

She probably ordered something like this but with a higher VAC.

http://www.grainger.com/Grainger/DAYTON-Motor-Start-Capacitor-6FLV5?Pid=search

Note how the uF on start caps is typically specified as a range of capacitance similar to the numbers she stated.

Facepalm.

That woman is going to hurt herself one of these days. It's a good thing for her that the voltages in her system are actually relatively low  AC. Charge up 800 microFarads to a couple hundred volts and manage to leave it on the cap ... that's not chopped liver. 25 Joules will kill you if you take it across the chest.

[TinselKoala]

What is even more hilarious is this:

https://www.youtube.com/watch?v=R-Awd8_Xro0

I am here running Tar Baby at 36 volts.... with NO BATTERY, just a bank of capacitors in parallel. I've charged these caps to the same voltage as the batteries, showed the SAME AINSLIE OSCILLATIONS, same negative mean power product, and then disconnected the batteries and let the circuit run on the caps alone-- showing that the oscillations and the negative mean power persist unchanged for as long as there is enough charge in the caps to sustain them.

And not a single cap in the _parallel stack_ is rated over 55 volts ... DC. Most are rated 40 volts. They are all polarized electrolytics of course.

So... why didn't they blow up? Duh....

Oh... maybe it's because I wasn't using enough mosfets. Yeah... that's got to be it.