RESONANCE EFFECTS FOR EVERYONE TO SHARE

[DrSimon]

@gotoluc

It is very simple if you have a (low value carbon resistor of less than 10% of the output impedance of the generator.

Place your scope (A) at the generator output terminals and measure the rms.

Across a 1 ohm resistor in the ground return of the generator use (B) and obtain the rms.

Use rms(R)/Rohms = Igen in a carbon resistor the voltage and current are always in phase (low freq)

Now that you have Igen you can use rmsOut X Igen to get the gen output.

Lets say you have 0.66V(rms) on the 1ohm - so Igen = 0.66/1 or = 0.66

Now if you gen output is 10vrms - 10 x 0.66 = 6.6

Simon

BTW you do not want to touch your gen as in an earlier post - all that will do is damage your gen and measure the eff of the gen and nothing to do with the output terminals.

[watercellguy]

To trully account for OU you need to measure how much power the circuit that generates the signal is using.

that is why I said you need to measure how much power the signal generator is using, not just how much power the LC circuit uses.

maybe that is why I was not able to measure any OU using this resonance methode, I am accounting for the power used by my electronic circuit also.

watercellguy

[CRANKYpants]

@everyone,

can someone please explain to me how to correctly measure and calculate my signal generator output ... please keep in mind that I have no electronic knowledge  so using words or letters that are related to this feild means nothing to me.

Please just explain it in plain English... like example: put scope prob A across SG and probe B across input resistor, then take RMS voltage reading of probe A and multiply by probe B RMS voltage, then divide by resistor value and this amount would be your watts in.

Can someone please do this favor for me.

Thank you for your time.

Luc

Sai Ram Luc,

If you bring it to the lab I can show you how to do it.

Cheers
Thane

[gotoluc]

Sai Ram Luc,

If you bring it to the lab I can show you how to do it.

Cheers
Thane

Sai Ram Thane,

this is the best way to do it ... thanks for the offer ... once I see it done I'll know how to do it after.

I don't know if it will be tomorrow though since I got to dig the car out of the snow and I have to drive to Ogdensburg, N.Y., USA to pickup the six 12vdc lead acid batteries and magnet wire I ordered on eBay to do the closed loop test and in the evening a meeting plus at 11:30pm my daughter is flying in from Calgary for a one week visit after being away over 2 years. I'm saying this so you and others know I may not be at this full time for several days.

After writing all this I'm thinking ... maybe it's easier to just do the closed loop test setup that Groundloop proposed since tomorrow I'll have all the parts to do this

I'll let you know later what I decide

Thanks for your great offer

Luc

[minde4000]

Closed loop ... NICE!  Buckle up ladies and gentelman. The biggest has yet to come. GJ