Testing the TK Tar Baby

[TinselKoala]

I'd really like to see someone else besides me analyze that SCRN0235 shot I posted above, so I can check my work. And so that some conclusions can be drawn.

Also, I am searching for a blow up of the oscillations taken with a 48-volt battery pack. I don't mean the slower envelope or a "burst" all the way across the screen... I want something I can actually measure the frequency of the oscs from, that was taken with the 48 volt battery pack.  If anybody comes across one in the "SCRNXXXX" series please post it or link it. Thanks in advance...
--TK

[TinselKoala]

Groundloop and Poynty Point

Thanks for the explanation

Kindest as ever
Rosie

This is unlike you, Rosemary. This surely is the record for the least word count in one of your posts. Especially when replying to MH or .99.

Aren't you feeling well? Cat got your tailfeathers again?

I'm crushed that you didn't even acknowledge the photograph I gave you. That one, I sell big prints of occasionally, and it's very popular with a certain crowd. Artsy types, you know. I really thought you might like it. Oh well..... different strokes for different folks, I guess.

Now... about those tests that you are getting ready to perform... of course you aren't going to charge your batteries beforehand, since they are always fully charged, and we know that even when they aren't, like down to 10 volts even, they still will run the circuit. So of COURSE you won't be needing to recharge your batteries before you start your current round of tests, which will commence as soon as you get your scope back from the repair shop. Won't it.

[Groundloop]

Groundloop:

You are wrong for negative oscillation mode.  In this mode the signal amplifier inside the the function generator acts like a battery in series will all of the other batteries with additive voltage.  It's also possible that the voltage being output by the signal amplifier is 15 or 20 volts.  In that sense it's a "bigger battery" in series with the other batteries.

In this case, all of the batteries, and the amplifier inside the function generator, provide power that is dissipated as heat in RLOAD.

MileHigh

MileHigh,

Yes, and that is the beauty of it. I may be wrong about the oscillator cycle and power into RLOAD.
And that is because I haven't done all the necessary measurements and theoretical analysis yet.
I will let you know what I find when I have done that.

GL.

[Rosemary Ainslie]

Guys - this one is hilarious.  I've highlighted the appropriate.

Ah.. .but GL... you are talking about ONE mode of operation, and the NERDs have typically been operating either in BOTH modes, or the OTHER Mode.

That is, they use a negative bias current exclusively or for most of the time. In the negative bias mode the bias source and the main battery are in aiding series and so both contribute to the entire power in the circuit. They never operate in the Positive bias mode for more than 50 percent of the duty cycle and usually much less than that, and the "desired" mode is to not use the positive bias at all, just stay in the negative bias, oscillation mode. And in that mode, it is apparent that the bias source or FG  CAN add to the power in the load... I think.


HEH... I see that MH is on top of this too. Great minds think alike !!

And kindly note in the context in which those 'GREAT MINDS' operate - as a gentle reminder...

Long exposure deep sky astrophotography is a piece of cake compared to some of the photography I can do...if it's important enough.  But shooting impromptu documentation of demonstrations designed to entertain a small audience and to educate an even smaller one... heck. I'll hold the camera under my chin, dim the lights to encourage hallucinations, reduce the HD originals to .flv, show the dog and the NERD preventer, all of that. If someone doesn't like it, they really should take the issue up with whoever it is that forces them to watch my videos. And if they fail to Get The Message, they only have their early educational choices and experiences to thank for that.)

If it weren't quite so insulting then it would REALLY be comical.   What troubles me is that I REALLY need the work of Groundloop and Poynty.  We all do.  And there's not much of this thread that is likely to survive when they're called on to remove the calumny and slander.  Hopefully we can salvage this more important aspect.

Regards as ever,
Rosemary

[Groundloop]

Ah.. .but GL... you are talking about ONE mode of operation, and the NERDs have typically been operating either in BOTH modes, or the OTHER Mode.

That is, they use a negative bias current exclusively or for most of the time. In the negative bias mode the bias source and the main battery are in aiding series and so both contribute to the entire power in the circuit. They never operate in the Positive bias mode for more than 50 percent of the duty cycle and usually much less than that, and the "desired" mode is to not use the positive bias at all, just stay in the negative bias, oscillation mode. And in that mode, it is apparent that the bias source or FG  CAN add to the power in the load... I think.


HEH... I see that MH is on top of this too. Great minds think alike !!

TK,

See my post to MileHigh.

Added: My next focus will be the oscillator mode. And I want to find out as much as I can about it.

GL.