Marjan Marbouti a graduate of Amir Kabir University in Iran built two VLF SID recievers for the soundcard. You can read about how she did that in the attached .PDF
Rodney
| Attachment | Size |
|---|---|
| Radio Telescopes version 3.pdf [1] | 1.12 MB |
Links:
[1] http://www.aavso.org/sites/default/files/Radio Telescopes version 3.pdf
[2] http://www.aavso.org/forums/variable-stars/solar-observing-and-sid-monitoring