[BARC-List] Waveform of Costco generator vs Honda vs Dayton

[Steven L. Finberg]

Well .. 

You have the generator.. what's inside?

An external test.  What does the frequency do 
as the throttle is bumped up?  If its just an iron generator
the freq will track the RPM exactly.

Its hard to imagine where that distortion and harmonic content
comes from in a simple  alternator. What was the load?

The real question we should be asking... 
How much RFI does it make?
Can you run / listen to an AM radio while it is running?
Under load?
How about an HF station on Field Day?   

73 Steve F
   W1GSL

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Steve Finberg                        W1GSL                       w1gsl at mit.edu
PO Box 397082 MIT Br        Cambridge MA  02139-7082              617 258 3754
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>I really doubt that there is any "inverter" in the Costco. Cheap (and       
>mid-priced) stand alone inverters produce "modified sine wave" power ... I  
>prefer to call it "modified square wave" power. Full sine wave inverters    
>cost considerably more. I've put cheap inverters on the scope and the       
>waveform looks nothing like the Costco. It is just a generator .. a cheap   
>generator made in China .. and you get what you pay for.                    
                                                                            
>Richard Amirault                                                            
>N1JDU                                                                       
>http://bostonfandom.org