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In Reply to: RE: update 5 posted by vinnie2 on September 14, 2016 at 05:19:02
A spectrum analyzer will show 60 cycle (AC hum) and 120 cycle (PS ripple) in relation to a typical test signal ( usually a 1KHz sine ).
I playing around with my RH test amp last night and noted that the 60 cycle hum was down about 75dB or so from the test signal.
120 cycle ripple would go down by adding more PS filtering.
It is easier to see if a circuit change is meaningful or not with something visual to look at like a graph in real time.
Follow Ups:
That would be great if I had one. Expensive piece of equipment I believe.
If you have a PC and a decent 192KHz soundcard, you have a basic audio measurement system.
There are freeware programs like ARTA or others online.
Search the archived posts for what others have already done.
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Have Fun and Enjoy the Music
"Still Working the Problem"
I think for now I will just use my on line tone generator to determine if it is 60 or 120. Much simpler and I already have everything I need. Thanks just he same guys.
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