File:Unknown-Wideband-Signal-4m-WSPR-area 4kHz-Audio-Band-all 5-Ap-21.jpg
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170 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). carriers in 4kHz audio bandwidth
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| Date/Time | Dimensions | User | Comment | |
|---|---|---|---|---|
| current | 08:59, 6 April 2021 | 1,366 × 768 (836 KB) | G8BQR (Talk | contribs) | 170 Hz carriers in 4kHz audio bandwidth |
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