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 opinion is that a bigger non-amplified loop is better than a smaller
amplified loop and an amplifier should be used only if really necessary (and
only with the strictly required gain). On the contrary, another famous article
says that an antenna pre-amplifier is important for NDB DX, despite it mentions
quite a big loop as the antenna. I’m just a beginner in LF and NDB
listening with quite a simple system. I tried an homebrew amplifier together with
my small loop and it seemed to me that it did not add anything but loudness to both
the signal and the noise. Basically, no improvements in signal readability. What’s
your opinion, in particular when cheap portables (e.g. DE1103) are involved?
Best regards
Daniele
