Hi Stefan, Understood and I would like to try an active E-probe soon. I also believe that I have experienced the amusing side of homebrewing enough and now I think I will choose a more reliable way t
Hi Johan, Would a normal carbon resistor be quiet enough as a dummy antenna impedance for this test? Cheers D. Daniele, the ususal rule of thumb is that you don't need any preamplifier if you get a b
Daniele, the ususal rule of thumb is that you don't need any preamplifier if you get a big increase in the noise level when the antenna is connected. It is best to make the comparison with a dummy lo
Hi Daniele, yes, absolutely. A simple resistor is very quiet compared to the noise figure of most LF receivers. An ideal resistor has a noise voltage of about 0.128 * R^0.5 [nV/(Hz^0.5)] at room temp
Hi Daniele, I mean, it depends on the surroundings and the space you have for an (RX) antenna. If you live in the nature, e.g. in a farmers house without electrical energy except a solar panel, batte
Hi LF, Quite a general question: is a pre-amplifier needed in your opinion for listening to LF weak signals (e.g. NDB DX, etc.)? I read different opinions in very famous articles on the Web: one opin
