Quote:
Originally Posted by andy
Actually, that is correct. The wall outlet is supposed to be about 120v RMS. You're looking at peak to peak voltage on the scope. Divide the p-p voltage by 2 to get peak voltage (350v p-p is 175v peak). Divide the peak voltage by the square root of 2 to get RMS (123.7v RMS in your case).
Also, you need to know that most AC volt meters are designed to read AC voltages as RMS, but that it only works for a pure sine wave like the AC power line. For anything else (like a square wave), it will be wrong unless it's a "true RMS" meter.
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Well then I feel better. Now I need to get back into the set to recheck the horizontal sweep as the PP I got put it at 160V and the Sams says it should be 120V. Since the board is driven by the 125V B+, I don't see how it could be putting out a 160V waveform.
Fun stuff, fun stuff.
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10-02-2013, 01:36 PM
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