No Resonance on Hans Filter
I just bought an assembled Hans filter from Pusherman. The resonance pot has no effect on the output sound except when higher than 3:00, and then only slightly. I wonder if the module was built with a bad or incorrect resistor in the feedback loop.
I can email a video of it in operation if necessary; along with a spectrogram.
Board v1.1. The solder joints all look good under a magnifying glass.
How should I proceed with warrantee repair? Is there anything I can test at home?
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Hey Shak,
What you’re experiencing is actually the expected behavior of the filter. The resonance begins to come in very subtly around the 12 o’clock position, becomes more pronounced by 3 o’clock, and may get a little unstable beyond that point. This is due to some necessary design compromises in order to keep the circuitry simple and still fit a stereo filter into such a compact HP format.
If you’d like the resonance to take effect earlier, you can reduce the values of resistors R19 and R31. Just keep in mind that this will also make the circuit less stable (what I did not find desirable). Another option is to replace the resonance stereo potentiometer with a linear type, which can give a different feel to the response. Thanks, Stefan