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Or, are you talking about putting the DMM in “Frequency/Duty measurement”? Putting 1 probe on the “In” and the other probe on the “Out” of the Muff’n PCB? When I do that, the LEDs light up when engaged, and I get a reading of 196 Hz when the Diode Selection switch is in the “Off” position, 145 Hz in “LED” position(also they light up), and 106 Hz in the “Silicon” switch position.
Nope. Remember. DC is direct current. That is a fixed (hopefully) voltage that you measure using the DC scale on the DMM.
A guitar signal is a complex AC signal. It varies in amplitude and also contains harmonic frequencies. A DMM set to AC scale will show a digital reading that moves around and never settles to a fixed value. This is best observed on an oscilloscope.
The best way to determine if the clipping diodes are working is to use your ears and hear the difference in tonal quality as you switch from one setting to another. Remember, clipping may not commence until the signal level exceeds a threshold level.
I hope this helps.
Wilkie, thank you so much for all your patience and help. Today I was able to really crank up my amp(and the Sustain on the Muff’n), and I could hear a difference in the clipping. I guess I assumed it would be a bigger difference when switching between Silicon, LED, and “Off”.
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