source= http://www.piclist.com/piclist/2005/07/16/135003a.txt?
Thanks Jose and Stef for your reply. As a matter of fact Jose, transmission, despite the
audio frecuency involved is not accoustical at all, so anything behaving as a microphone
is discarded. I have tried a walkman earphone acting as a rf signal pickup, and being very
small, I can only get 5 mVolts peak to peak when its 5 cm. away from the belt. Ill try, as
Stef suggests, something bigger.

Thank you both. Ill let you know the results.
---
guillermo  mendive
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