The Tecsun PL-990 receives longwave much better with an external antenna plus ground than it does with just the antenna or with the internal ferrite antenna.
Here we see the PL-990 receiving the Culpeper Virginia Regional Airport non-directional beacon on 315 kHz comparing internal antenna, external antenna and antenna + ground.
For the text version of this article, see www.blogordie.com/2023/12/ant...
30 дек 2023