Everything You Ever Wanted To Know About the JRC NRD 545
Here are some audio spectrum measurements from my Icom R-71A, for comparison:
(But Were Afraid To Ask)
The spike you see around 16 kHz is most probably from the fluorescent display DC/DC
This R-71A is not completely stock, the medium filter is the Collins Mechanical Filter sold
by EEB back in the early 1990s.