| CW sample file 1 |
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In this file you will hear the filter, first switched out completely, then switched in, and then the cut-off frequency control being tuned from high to low. Audio file is in WAV format and is 245kb. Click to listen now.
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| CW sample file 2 |
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A brief file, copying CW. First, the filter is switched out in an environment with considerable line noise. The filter is then switched in. The filter does not claim to remove the noise, but it makes copier much easier and less fatiguing. Audio file is in WAV format and is 117kb. Click to listen now.
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| CW sample file 3 |
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A longer file, copying a CW Signal that has some QSB, with some line noise. The filter is switched in and out multiple times. This file demonstrates very well the effect of also removing white noise. Audio file is in WAV format and is 900kb. Click to listen now.
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| CW sample file 4 |
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A brief file, showing first CW with no filter, then the filter switched in but at maximum bandwidth, then the filter is slowly "tightened" onto one signal. Audio file is in WAV format and is 203kb. Click to listen now.
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| CW sample file 5 |
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A brief file, showing CW first with a bad electrical noise, then the filter switched in. Again the noise is not removed but is considerably attenuated and copy becomes more pleasant. Audio file is in WAV format and is 111kb. Click to listen now.
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| SSB sample file 1 |
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A brief file, copying a fairly weak mobile SSB station, with background line noise. The apparent improvement when the filter is switched in does not seem huge, but the improvement in copy is substantial!
Audio file is in WAV format and is 98kb. Click to listen now.
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| SSB sample file 2 |
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Another brief file of a signal with line noise, and the filter out, then switched in. Audio file is in WAV format and is 110kb. Click to listen now.
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| SSB sample file 3 |
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A brief SSB file, showing QRM reduction when the filter is switched in. Audio file is in WAV format and is 183kb. Click to listen now.
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| SSB sample file 4 |
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A longer SSB file, with the filter switched in and out several times primarily demonstrating QRM reduction. Audio file is in WAV format and is 328kb. Click to listen now.
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| SSB sample file 5 |
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A longer SSB file, again with the filter switched in and out several times primarily demonstrating QRM reduction. Audio file is in WAV format and is 624kb. Click to listen now.
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