Audio Low Pass Filters


Good for ham radio use where good voice quality is desired without alot of trouble.

Home
How to use: Each file name describes the filter. example "3k5hz_100kohm_lpf_chart.png" means a filter that starts to drop off at 3.5KHz (not the -3dB point, but the point where the filter starts to attenuate) and has input and output impedance of 100K Ohms. The chart and schematic are provided for each one.

3k5hz_100kohm_lpf_chart.png
3k5hz_100kohm_lpf_chart.png
3k5hz_100kohm_lpf_schem.png
3k5hz_100kohm_lpf_schem.png
3k5hz_20kohm_lpf_chart.png
3k5hz_20kohm_lpf_chart.png
3k5hz_20kohm_lpf_schem.png
3k5hz_20kohm_lpf_schem.png
3k5hz_600ohm_lpf_chart.png
3k5hz_600ohm_lpf_chart.png
3k5hz_600ohm_lpf_schem.png
3k5hz_600ohm_lpf_schem.png
4k5hz_100kohm_lpf_chart.png
4k5hz_100kohm_lpf_chart.png
4k5hz_100kohm_lpf_schem.png
4k5hz_100kohm_lpf_schem.png
4k5hz_20kohm_lpf_chart.png
4k5hz_20kohm_lpf_chart.png
4k5hz_20kohm_lpf_schem.png
4k5hz_20kohm_lpf_schem.png
4k5hz_600ohm_lpf_chart.png
4k5hz_600ohm_lpf_chart.png
4k5hz_600ohm_lpf_schem.png
4k5hz_600ohm_lpf_schem.png