Partnered Output Coils - Free Energy

[TinselKoala]

I am almost going insane because I can't find the bits of precision for the four A/D channels and I am still searching.

8 bits. What do you expect for $399, chopped liver?



http://www.adafruit.com/datasheets/MSO%20%20DS1000Z%20Datasheet-EN.pdf

[MileHigh]

Assuming you are correct, this is where I hate Marketing.  They bury the 'ordinary' specification for the bits of precision.  I know everybody does it.

Thanks for the pdf link, I will have a look.

The very same scope but with four channels of 12-bit A/D and 1/2 the number of sample points (same amount of memory) for $499 would be a dream.

Even though I never really used a DSO seriously, I want 12 bits.

[MarkE]

No such claim by me! My  only hypothesis here is that similar circuits will perform similarly.

Definitely you made no such specious claims.  EMJ did.

Now here's a clue for us all: If that 10 Watt load resistor is not getting perceptibly warm to the touch, there is very little power being dissipated in it. In fact one should probably use a lower wattage resistor here and monitor its temperature carefully. If it doesn't get warm... The Walrus was Paul. 

It's hard to heat up a cement resistor when so much of the energy is being thrown out as RF.

Unfortunately my DSO, the old Link, cannot do trace multiplication, so I can't easily do a valid output power measurement, even though my FG is isolated. To measure the output power one would monitor the output as Conradelectro has done, with one probe looking at the V output across the load and inline CVR and the other probe looking just at Vdrop across the CVR itself with very short connecting leads. One assumes that the probes don't perturb the output very much. Then one would disconnect the probes from the output and do a similar measurement of the input power on the scope. I have not yet looked at the input waveshape to see how accurate the inline current meter is reading.

Ultimately I can do the measurements with the DSO, dump the data into the spreadsheet and generate an instantaneous power curve for both input and output sets of readings, then integrate them over a suitable number of whole cycles to get an energy balance. If I can maintain the enthusiasm, of course.

I'm hoping the Tooth Fairy will put one of these under my pillow:
http://www.tequipment.net/Rigol/DS1054Z/Digital-Oscilloscopes/

Four channels, deep memory, a screen, much faster sampling rate, the Rigol puts the Link to shame.  But then the Link must be over 15 years old.  Here's hoping the tooth fairy finds your house.

[MarkE]

I am almost going insane because I can't find the bits of precision for the four A/D channels and I am still searching.

Almost all scopes use 8 bit A/D's.  Some fancy scopes have 12 bit A/D's.  Those are definitely not in the sub $1000. class.

[MileHigh]

Here is where you have the Cabal in action!  lol   For all we know the 12-bit A/D converter chips are not really and truly that much more expensive.  Somebody has to eat some margin.  The internal guts of the thing may already support a 12-bit-wide acquisition path.  But 'they' are just waiting for the right time to set the right price-point that will get the most people to "refresh" their bench DSOs, just like upgrading your bloody cell phone.

But I should not be such a sourpuss.  The thing looks awesome for the price.