Author Topic: Ripple Current (and fooling around with a HP 204C Sine Oscillator)  (Read 9489 times)

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Offline requimTopic starter

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Re: Ripple Current (and fooling around with a HP 204C Sine Oscillator)
« Reply #25 on: December 21, 2011, 07:29:30 am »
Well after many days of neglect I finally pulled out the necessary equipment along with the oscillator to test it.  As it turns out the something that was wrong was primarily user error.  I did however learn a few things.  I noticed one capacitor leg wasn't soldered in so I soldered that in.  Not sure whether I removed the solder on that joint before or after testing.

I also learned that in order to get positive and negative voltages I need to use the shared +/- as my circuit ground whereas before I had tried using earth ground (or I assume that's what the green ground is coming out of the power supply).  And finally I realized that my oscilloscope was triggering on a specific channel and not vertical mode.   After all was said and done it looks like I have a mostly working sine oscillator.  It seems a bit dodgy when I adjust the frequency but it seems to eventually stabilize.

I guess now that I've learned a thing or two testing the other sine oscillator should be a piece of cake.  I'm not sure whether I am going to go through the effort of making a power supply for it at this point primarily due to financial considerations.  I have some other projects I'd rather put the money into.  I should probably price it out before I make the final decision but that's the direction I'm leaning in.

Just glad to have finally figured out what was wrong with it.  I can finally clear it off my list of things to do and move onto something more interesting like my electronic load.
 


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