another small breakthrough on our NERD technology.

[TinselKoala]

This is getting to be like the SKDB, isn't it. Some claims are made, some interested people get involved trying to reproduce the claimed effects but get no real help from the originators... who then appear to have a stable of unpaid and maybe even _paying_ consultants to help them try to develop something that would support their original claims which had no real support in the first place, ashes ashes we all fall down ....

So I'm going to have to make up... literally, ha ha, a 555 timer circuit that will sub for the FG. Then.... since I am using it.... Rosemary won't be able to touch it, because it's contaminated by the truth.

It will take me half an hour or so; I should be able to get it done this afternoon, after I take my feral chowyote dog out to hunt for Easter Egg hunters.

[poynt99]

I ran up one of my simulations of the RAT circuit with two MOSFETs, Q1 and Q2, and you were pretty close PW, the average battery/FG current is about 175mA in my sim running in negative bias mode (Q1 inactive, Q2 actively oscillating).

The average battery power is about -2W, and average FG power about -1W, for a total of 3W to the circuit. I have a 4 Ohm FG resistor, not 50 Ohm. The oscillations don't appear correct if I use 50 Ohms.

It's interesting to note, that in my sim, the VGS does not seem to exceed -4V, even if I set the FG to -9V. Something is limiting it to about -4V.

[MileHigh]

TK:

Re:  The LEDs of Doom test.  I was keeping it simple.  Indeed you would have to parallel multiple LEDs.  I would default back to my suggestion to put 4 LEDs in parallel back to back with four LEDs in parallel on a breadboard.

If there are any problems with sustaining the oscillation perhaps put the LEDs between the battery positive terminal and the load resistor.

How about a simple Plan B:  Do the Poynt version:  Do the test (negative oscillation mode) using two small incandescent light bulbs back-to back with accompanying diodes that can easily handle 200 mA.

If you measure the voltage across the bulb + diode at 200 mA, then you would know how much you would need to compensate with the function generator by increasing its negative voltage output.

As a reminder to all, this is to show that the current is clockwise in negative oscillation mode and the batteries are discharging.  Rosemary believes that the batteries are charging and the current is running counter-clockwise.

MileHigh

[Rosemary Ainslie]

I ran up one of my simulations of the RAT circuit with two MOSFETs, Q1 and Q2, and you were pretty close PW, the average battery/FG current is about 175mA in my sim running in negative bias mode (Q1 inactive, Q2 actively oscillating).

The average battery power is about -2W, and average FG power about -1W, for a total of 3W to the circuit. I have a 4 Ohm FG resistor, not 50 Ohm. The oscillations don't appear correct if I use 50 Ohms.

It's interesting to note, that in my sim, the VGS does not seem to exceed -4V, even if I set the FG to -9V. Something is limiting it to about -4V.

Which RAT circuit Poynty?  There are so many.  And WHAT is a VGS?
Rosie Pose

[poynt99]

Which RAT circuit Poynty?  There are so many.  And WHAT is a VGS?
Rosie Pose

Rosemary,

It is a circuit with one Q1, and one Q2, connected as per your setup. FG is with 5V negative offset.

"VGS" is read: "voltage-gate-to-source". So this is the voltage measured from/between the gate and source legs of the MOSFET(s).