Approaching the best primary impedance on low or high side? - Page 2 - diyAudio
 Approaching the best primary impedance on low or high side?
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 24th August 2011, 08:41 AM #11 diyAudio Member   Join Date: Jul 2010 For class A operation on 250V they recommend 43mA, for AB 34mA. So I only lower the current and I am in other operation? But how do I find the power output? What will I have to measure to approximate?
 24th August 2011, 01:37 PM #12 diyAudio Member   Join Date: Nov 2010 Location: England Hertfordshire current x HT voltage will give you a rough guideline.
 24th August 2011, 01:39 PM #13 diyAudio Member     Join Date: Aug 2009 Location: Johnson City, TN Measure the RMS output voltage just before clipping. Then P=E*E/R where E is rms voltage, R is your load impedance and P is power. RMS = Peak to Peak /2.83
 24th August 2011, 01:45 PM #14 diyAudio Member   Join Date: Nov 2010 Location: England Hertfordshire isnt RMS = peak to peak/root2
 24th August 2011, 03:30 PM #15 diyAudio Member     Join Date: Aug 2009 Location: Johnson City, TN Peak = p-p/2 RMS = Peak/root2* * only for sine waves
 24th August 2011, 04:40 PM #16 diyAudio Member   Join Date: Jul 2010 If I use sine wave generator as input signal, then I use root^2. Tomorrow I will probably build the amp and try it out.

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