Jeff Liebermann wrote in
:

For FM tuners, it's dBf (dB over 1 femtowatt) usually into 300 ohms
but sometimes into 75 ohms:


The Tecsun PL-390 uses dBµ (micro). Most of this is new to me, but I read
that Tecsun's dB referencing makes them useful to EMI and RFI engineers, and
one related radio beign especially useful for tracing noise, having a plug-in
rotatable magnetic loop antenna as well as a long(ish) whip.

At this point pouring scorn or praise on Tecsun radios is interesting to me
either way, because for the first time in a while I have found a radio I care
enough not to be indifferent to it.