Assume we are going SDR, RX and maybe TX, one rig could serve both frequencies.
Conceptual design:
- TCXO on 4.1943MHz
- 4.1943 / 2 = 2.0972
- 2.0972 / 4 = 0.5243 (SDR center frequency)
- about 20kHz above the band
- 4.1943 / 8 = 0.5243
- 0.5243 / 4 = 0.1311 (SDR center frequency)
- about 6kHz below the band
My experience is that (for my computers) 96k sampling works best. The observable ranges would therefore be:
- 476.3kHz - 572.3kHz for MW
- 83.1kHz - 179.1kHz for LW