Dear LF Group, The 137kHz ferrite rod RX antenna I have been experimenting with in the last few weeks has proved to have more than adequate sensitivity, but the narrow <1kHz bandwidth is a problem. I
Excellent! Maybe i will try that circuit. 37 mA at 12V (so about 50 mA in sum) is probably close to the limit of my USB 5V/12V supply but acceptable. 73, Stefan Am 11.09.2011 15:16, schrieb James Mor